MedWorm.com provides a medical RSS filtering service. Over 6000 RSS medical sources are combined and output via different filters. This feed contains the latest items from the 'Journal of Sleep Research' source. Wed, 08 Feb 2012 20:43:19 +0100 http://www.medworm.com/index.php?rid=5668641&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2012.01000.x SummaryThe sleep–wake disorder narcolepsy with cataplexy is associated with the loss of hypocretin‐(orexin‐) producing neurons in the lateral hypothalamus. Several studies have reported abnormal cerebral activation in patients with narcolepsy with cataplexy. It remains unclear, however, whether these functional changes are related to structural alterations, particularly at the cortical level. To quantify structural brain changes associated with narcolepsy with cataplexy, we used high‐resolution T1‐weighted magnetic resonance imaging (MRI) in 12 patients compared with 12 healthy participants matched for age and gender. Subcortical and regional cortical volumes were measured using a method unbiased by non‐linear registration. Further whole‐brain analyses were conducted, measuri... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5668641 Mon, 06 Feb 2012 05:00:00 +0100 5668641 http://www.medworm.com/index.php?rid=5668640&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2012.00996.x This study involved 199 working women with a mean age of 33.8 years. Sleep problems were assessed with the Jenkins Sleep Problems Scale, and the Day Reconstruction Method was used to measure positive affect and stress on the evening before and during the working day. Heart rate variability was indexed by the mean square root of the successive standard difference in heart period. Disturbed sleep was inversely related to heart rate variability during the working day (P = 0.022), independently of demographic and behavioural confounders. Additional adjustment for positive affect and stress did not lead to further reductions in the association between sleep problems and reduced heart rate variability over the work day. Sleep problems were not predictive of reduced night‐time heart rate ... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5668640 Wed, 01 Feb 2012 05:00:00 +0100 5668640 http://www.medworm.com/index.php?rid=5639459&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00991.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5639459 Mon, 30 Jan 2012 02:10:17 +0100 5639459 http://www.medworm.com/index.php?rid=5621467&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22260308%26dopt%3DAbstract Authors: Dijk DJ PMID: 22260308 [PubMed - in process] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5621467 Tue, 24 Jan 2012 03:12:12 +0100 5621467 http://www.medworm.com/index.php?rid=5610962&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00995.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5610962 Sat, 21 Jan 2012 00:39:31 +0100 5610962 http://www.medworm.com/index.php?rid=5610961&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00963.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5610961 Sat, 21 Jan 2012 00:39:29 +0100 5610961 http://www.medworm.com/index.php?rid=5578143&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22221543%26dopt%3DAbstract Authors: Jakobson AJ, Fitzgerald PB, Conduit R Abstract REM sleep is a unique brain state characterized by frontal deactivation alongside activation of the posterior association and limbic cortices. Human brain lesion studies have found that the loss of dreaming is characterized by damage to the frontal and posterior parieto-temporo-occipital association cortex. Therefore, it is reasonable to assume that the function of these brain regions might encapsulate the neural processes of dreaming. The aim of the following two experiments was to investigate the effect of transcranial direct current stimulation (tDCs), applied simultaneously to the frontal and right posterior parietal cortex during Stage 2 sleep, on dreaming. In Experiment 1, 17 healthy participants received tDCs (cathodal-... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5578143 Thu, 05 Jan 2012 05:00:00 +0100 5578143 http://www.medworm.com/index.php?rid=5560038&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22211627%26dopt%3DAbstract Authors: Oksenberg A, Dynia A, Nasser K, Gadoth N Abstract The aim of this work was to study the relationship between changes of body posture dominance and changes of body weight overtime in adults with obstructive sleep apnoea. The participants were 112 non-treated adults with obstructive sleep apnoea who underwent two polysomnographic evaluations at our Sleep Disorders Unit during an average of 6.2 years interval. Positional patients - having most of their breathing abnormalities in the supine posture and who became non-positional patients - had a significant gain in weight and a significant increase in apnoea-hypopnoea index, mainly in lateral apnoea-hypopnoea index. On the contrary, non-positional patients who became positional patients had a significant decrease in weight (b... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5560038 Thu, 29 Dec 2011 05:00:00 +0100 5560038 http://www.medworm.com/index.php?rid=5560037&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22211671%26dopt%3DAbstract The objective of this paper was to examine the associations between sleep duration and prevalent cardiovascular disease in a large sample of Australian adults, and identify the sociodemographic and health-related factors moderating these associations. Participants included 218 155 Australian adults aged 45 years and over. The results indicated that 6 h versus 7 h sleep was associated with increased odds of heart disease [odds ratio (OR) = 1.11 (1.06-1.17)], diabetes [OR = 1.15 (1.09-1.22)], stroke [OR = 1.25 (1.14-1.38)] and high blood pressure [OR = 1.08 (1.04-1.11)]. Long sleep (≥9 h sleep) was also related to elevated odds of heart disease [OR = 1.14 (1.09-1.19)], diabetes [OR = 1.25 (1.19-1.31)], stroke [OR = 1.50 (1.38-1.62)] and high blood pres... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5560037 Thu, 29 Dec 2011 05:00:00 +0100 5560037 http://www.medworm.com/index.php?rid=5553254&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00993.x The objective of this paper was to examine the associations between sleep duration and prevalent cardiovascular disease in a large sample of Australian adults, and identify the sociodemographic and health‐related factors moderating these associations. Participants included 218 155 Australian adults aged 45 years and over. The results indicated that 6 h versus 7 h sleep was associated with increased odds of heart disease [odds ratio (OR) = 1.11 (1.06–1.17)], diabetes [OR = 1.15 (1.09–1.22)], stroke [OR = 1.25 (1.14–1.38)] and high blood pressure [OR = 1.08 (1.04–1.11)]. Long sleep (≥9 h sleep) was also related to elevated odds of heart disease [OR = 1.14 (1.09–1.19)], diabetes [OR = 1.25 (1.19–1.31)], stroke [OR = 1.50 (1.38–1.62)] and... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5553254 Thu, 29 Dec 2011 05:00:00 +0100 5553254 http://www.medworm.com/index.php?rid=5534467&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22150963%26dopt%3DAbstract Authors: Michael L, Passmann S, Becker R Abstract The present study addresses the suitability of electrodermal lability as an indicator of individual vulnerability to the effects of total sleep deprivation. During two complete circadian cycles, the effects of 48 h of total sleep deprivation on physiological measures (electrodermal activity and body temperature), subjective sleepiness (measured by visual analogue scale and tiredness symptom scale) and task performance (reaction time and errors in a go/no go task) were investigated. Analyses of variance with repeated measures revealed substantial decreases of the number of skin conductance responses, body temperature, and increases for subjective sleepiness, reaction time and error rates. For all changes, strong circadian oscillati... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5534467 Mon, 12 Dec 2011 05:00:00 +0100 5534467 http://www.medworm.com/index.php?rid=5534466&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22151014%26dopt%3DAbstract Authors: Tatone-Tokuda F, Dubois L, Ramsay T, Girard M, Touchette E, Petit D, Montplaisir JY Abstract Sex differences in the effects of sleep duration on dietary intake and eating behaviours were examined prospectively in relation to overweight/obesity at ages 6 and 7. Using data from a representative sample (QLSCD 1998-2010) of children born in the province of Québec (Canada), 1106 children were followed to age 6 and 1015 to 7 years. Average nocturnal sleep duration was surveyed annually from 2.5-6 years, food-frequency and eating behaviour questionnaires were administered at age 6, and body weight and height were measured at 6 and 7 years. Associations were examined longitudinally and mediation examined with adjustments for potential confounders. In boys and girls, shorter... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5534466 Mon, 12 Dec 2011 05:00:00 +0100 5534466 http://www.medworm.com/index.php?rid=5534465&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22151079%26dopt%3DAbstract This study demonstrates that sleep disturbance is a novel risk factor that is potentially modifiable. Future research should determine whether sleep intervention could reduce the cardiometabolic consequences of sleep disturbance. PMID: 22151079 [PubMed - as supplied by publisher] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5534465 Mon, 12 Dec 2011 05:00:00 +0100 5534465 http://www.medworm.com/index.php?rid=5495895&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00984.x SummaryThe present study addresses the suitability of electrodermal lability as an indicator of individual vulnerability to the effects of total sleep deprivation. During two complete circadian cycles, the effects of 48 h of total sleep deprivation on physiological measures (electrodermal activity and body temperature), subjective sleepiness (measured by visual analogue scale and tiredness symptom scale) and task performance (reaction time and errors in a go/no go task) were investigated. Analyses of variance with repeated measures revealed substantial decreases of the number of skin conductance responses, body temperature, and increases for subjective sleepiness, reaction time and error rates. For all changes, strong circadian oscillations could be observed as well. The electrodermal mo... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5495895 Mon, 12 Dec 2011 05:00:00 +0100 5495895 http://www.medworm.com/index.php?rid=5495894&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00990.x This study demonstrates that sleep disturbance is a novel risk factor that is potentially modifiable. Future research should determine whether sleep intervention could reduce the cardiometabolic consequences of sleep disturbance. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5495894 Mon, 12 Dec 2011 05:00:00 +0100 5495894 http://www.medworm.com/index.php?rid=5493220&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22142323%26dopt%3DAbstract Authors: Donjacour CE, Lammers GJ PMID: 22142323 [PubMed - as supplied by publisher] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5493220 Mon, 05 Dec 2011 05:00:00 +0100 5493220 http://www.medworm.com/index.php?rid=5493221&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22133127%26dopt%3DAbstract Authors: Fischer J, Dogas Z, Bassetti CL, Berg S, Grote L, Jennum P, Levy P, Mihaicuta S, Nobili L, Riemann D, Puertas Cuesta FJ, Raschke F, Skene DJ, Stanley N, Pevernagie D Abstract The present paper describes standardized procedures within clinical sleep medicine. As such, it is a continuation of the previously published European guidelines for the accreditation of sleep medicine centres and European guidelines for the certification of professionals in sleep medicine, aimed at creating standards of practice in European sleep medicine. It is also part of a broader action plan of the European Sleep Research Society, including the process of accreditation of sleep medicine centres and certification of sleep medicine experts, as well as publishing the Catalogue of Knowledge and Skil... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5493221 Fri, 02 Dec 2011 05:00:00 +0100 5493221 http://www.medworm.com/index.php?rid=5561930&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00994.x SummaryREM sleep is a unique brain state characterized by frontal deactivation alongside activation of the posterior association and limbic cortices. Human brain lesion studies have found that the loss of dreaming is characterized by damage to the frontal and posterior parieto–temporo–occipital association cortex. Therefore, it is reasonable to assume that the function of these brain regions might encapsulate the neural processes of dreaming. The aim of the following two experiments was to investigate the effect of transcranial direct current stimulation (tDCs), applied simultaneously to the frontal and right posterior parietal cortex during Stage 2 sleep, on dreaming. In Experiment 1, 17 healthy participants received tDCs (cathodal–frontal, anodal–parietal) and low‐intensity tDC... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5561930 Thu, 01 Dec 2011 05:00:00 +0100 5561930 http://www.medworm.com/index.php?rid=5553253&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00988.x SummaryThe aim of this work was to study the relationship between changes of body posture dominance and changes of body weight overtime in adults with obstructive sleep apnoea. The participants were 112 non‐treated adults with obstructive sleep apnoea who underwent two polysomnographic evaluations at our Sleep Disorders Unit during an average of 6.2 years interval. Positional patients – having most of their breathing abnormalities in the supine posture and who became non‐positional patients – had a significant gain in weight and a significant increase in apnoea–hypopnoea index, mainly in lateral apnoea–hypopnoea index. On the contrary, non‐positional patients who became positional patients had a significant decrease in weight (but less than the increase in weight of positio... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5553253 Thu, 01 Dec 2011 05:00:00 +0100 5553253 http://www.medworm.com/index.php?rid=5495893&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00989.x SummarySex differences in the effects of sleep duration on dietary intake and eating behaviours were examined prospectively in relation to overweight/obesity at ages 6 and 7. Using data from a representative sample (QLSCD 1998–2010) of children born in the province of Québec (Canada), 1106 children were followed to age 6 and 1015 to 7 years. Average nocturnal sleep duration was surveyed annually from 2.5–6 years, food‐frequency and eating behaviour questionnaires were administered at age 6, and body weight and height were measured at 6 and 7 years. Associations were examined longitudinally and mediation examined with adjustments for potential confounders. In boys and girls, shorter sleep duration patterns were associated significantly with less favourable dietary intakes at 6�... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5495893 Thu, 01 Dec 2011 05:00:00 +0100 5495893 http://www.medworm.com/index.php?rid=5477922&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00985.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5477922 Thu, 01 Dec 2011 05:00:00 +0100 5477922 http://www.medworm.com/index.php?rid=5470247&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00987.x SummaryThe present paper describes standardized procedures within clinical sleep medicine. As such, it is a continuation of the previously published European guidelines for the accreditation of sleep medicine centres and European guidelines for the certification of professionals in sleep medicine, aimed at creating standards of practice in European sleep medicine. It is also part of a broader action plan of the European Sleep Research Society, including the process of accreditation of sleep medicine centres and certification of sleep medicine experts, as well as publishing the Catalogue of Knowledge and Skills for sleep medicine experts (physicians, non‐medical health care providers, nurses and technologists), which will be a basis for the development of relevant educational curricula. I... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5470247 Thu, 01 Dec 2011 05:00:00 +0100 5470247 http://www.medworm.com/index.php?rid=5442942&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00986.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5442942 Fri, 25 Nov 2011 13:10:01 +0100 5442942 http://www.medworm.com/index.php?rid=5423675&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00979.x SummaryThe sustained attention to response task comprises withholding key presses to one in nine of 225 target stimuli; it proved to be a sensitive measure of vigilance in a small group of narcoleptics. We studied sustained attention to response task results in 96 patients from a tertiary narcolepsy referral centre. Diagnoses according to ICSD‐2 criteria were narcolepsy with (n = 42) and without cataplexy (n = 5), idiopathic hypersomnia without long sleep time (n = 37), and obstructive sleep apnoea syndrome (n = 12). The sustained attention to response task was administered prior to each of five multiple sleep latency test sessions. Analysis concerned error rates, mean reaction time, reaction time variability and post‐error slowing, as well as the correlation of sustain... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5423675 Sat, 19 Nov 2011 13:23:29 +0100 5423675 http://www.medworm.com/index.php?rid=5419850&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22077316%26dopt%3DAbstract Authors: Dijk DJ PMID: 22077316 [PubMed - in process] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5419850 Fri, 18 Nov 2011 16:24:19 +0100 5419850 http://www.medworm.com/index.php?rid=5410323&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00980.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5410323 Thu, 17 Nov 2011 04:03:30 +0100 5410323 http://www.medworm.com/index.php?rid=5410321&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00983.x SummaryObstructive sleep apnea (OSA) belongs to the sleep‐related breathing disorders and is associated with cognitive impairments in learning and memory functions. The impairments in attention‐demanding cognitive functions such as working memory and executive functions are well established in OSA; however, it remains unknown if less attention‐demanding implicit sequence learning is affected. In the present study, we examined implicit sequence learning in OSA to probe the functional integrity of this fundamental learning mechanism. We used listening span to measure complex working memory capacity and the alternating serial reaction time (ASRT) task, which enables us to measure general skill learning and sequence‐specific learning separately. Twenty OSA patients and 20 healthy contr... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5410321 Thu, 17 Nov 2011 04:02:19 +0100 5410321 http://www.medworm.com/index.php?rid=5419849&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22084833%26dopt%3DAbstract Authors: Ferri R, Rundo F, Novelli L, Terzano MG, Parrino L, Bruni O Abstract The aim of this study was to arrange an automatic quantitative measure of the electroencephalographic (EEG) signal amplitude variability during non-rapid eye movement (NREM) sleep, correlated with the visually extracted cyclic alternating pattern (CAP) parameters. Ninety-eight polysomnographic EEG recordings of normal controls were used. A new algorithm based on the analysis of the EEG amplitude variability during NREM sleep was designed and applied to all recordings, which were also scored visually for CAP. All measurements obtained with the new algorithm correlated positively with corresponding CAP parameters. In particular, total CAP time correlated with total NREM variability time (r = 0.596; P ... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5419849 Wed, 16 Nov 2011 05:00:00 +0100 5419849 http://www.medworm.com/index.php?rid=5410322&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00981.x SummaryThe aim of this study was to arrange an automatic quantitative measure of the electroencephalographic (EEG) signal amplitude variability during non‐rapid eye movement (NREM) sleep, correlated with the visually extracted cyclic alternating pattern (CAP) parameters. Ninety‐eight polysomnographic EEG recordings of normal controls were used. A new algorithm based on the analysis of the EEG amplitude variability during NREM sleep was designed and applied to all recordings, which were also scored visually for CAP. All measurements obtained with the new algorithm correlated positively with corresponding CAP parameters. In particular, total CAP time correlated with total NREM variability time (r = 0.596; P < 1E‐07), light sleep CAP time with light sleep variability time (r�... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5410322 Wed, 16 Nov 2011 05:00:00 +0100 5410322 http://www.medworm.com/index.php?rid=5419851&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22074234%26dopt%3DAbstract Authors: Friborg O, Bjorvatn B, Amponsah B, Pallesen S Abstract The hypothesis of whether day length (photoperiod) is an important zeitgeber (time-giver) for keeping the circadian rhythm entrained to a 24-hour cycle was examined, as was its association with sleep patterns and mood problems. Data were collected prospectively from a site with very large differences in daylight duration across seasons (Tromsø in Norway, 69°39'N) and a site with very small seasonal differences in daylight duration (Ghana in Accra, 5°32'N). Two hundred subjects were recruited from both sites in January. At the follow-up in August, 180 and 150 subjects in Ghana and Norway participated, respectively. Use of a weekly sleep diary indicated low to moderately strong seasonal changes in rise- and bedtime, s... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5419851 Thu, 10 Nov 2011 05:00:00 +0100 5419851 http://www.medworm.com/index.php?rid=5379644&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22017727%26dopt%3DAbstract Authors: VAN Maanen JP, Richard W, VAN Kesteren ER, Ravesloot MJ, Laman DM, Hilgevoord AA, DE Vries N Abstract Obstructive sleep apnoea syndrome is a common clinical problem. Positional sleep apnoea syndrome, defined as having a supine apnoea-hypopnoea index of twice or more compared to the apnoea-hypopnoea index in the other positions, occurs in 56% of obstructive sleep apnoea patients. A limited number of studies focus on decreasing the severity of sleep apnoea by influencing sleep position. In these studies an object was strapped to the back (tennis balls, squash balls, special vests), preventing patients from sleeping in the supine position. Frequently, this was not successful due to arousals while turning from one lateral position to the other, thereby disturbing sleep archite... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5379644 Sat, 22 Oct 2011 04:00:00 +0100 5379644 http://www.medworm.com/index.php?rid=5379646&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22004346%26dopt%3DAbstract In conclusion, it is important to question sleep disorder followed by a polysomnography, if necessary, in order to improve quality of life and fatigue in Behçet's disease. PMID: 22004346 [PubMed - as supplied by publisher] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5379646 Mon, 17 Oct 2011 04:00:00 +0100 5379646 http://www.medworm.com/index.php?rid=5379645&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D22004376%26dopt%3DAbstract Authors: Choi JH, Yi JS, Lee SH, Kim CS, Kim TH, Lee HM, Lee BJ, Lee SH, Chung YS Abstract To determine whether surgery influences cardiovascular autonomic modulation in obstructive sleep apnoea syndrome (OSAS), the present study was performed to evaluate the effect of upper airway (UA) surgery on heart rate variability (HRV) using frequency domain analysis for patient groups who have had either successful or unsuccessful surgery. We compared body mass index (BMI), polysomnographic [apnoea index (AI), apnoea-hypopnoea index (AHI), minimum SaO(2) ] and HRV [very low frequency (VLF) power, low frequency (LF) power, high frequency (HF) power, HF/LF ratio, LFnu = LF/(LF + HF), HFnu = HF/(LF + HF)] parameters between the unsuccessful (n = 14) and successful (n = ... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5379645 Mon, 17 Oct 2011 04:00:00 +0100 5379645 http://www.medworm.com/index.php?rid=5325291&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00978.x SummaryTo determine whether surgery influences cardiovascular autonomic modulation in obstructive sleep apnoea syndrome (OSAS), the present study was performed to evaluate the effect of upper airway (UA) surgery on heart rate variability (HRV) using frequency domain analysis for patient groups who have had either successful or unsuccessful surgery. We compared body mass index (BMI), polysomnographic [apnoea index (AI), apnoea‐hypopnoea index (AHI), minimum SaO2] and HRV [very low frequency (VLF) power, low frequency (LF) power, high frequency (HF) power, HF/LF ratio, LFnu = LF/(LF + HF), HFnu = HF/(LF + HF)] parameters between the unsuccessful (n = 14) and successful (n = 22) surgical groups before and after UA surgery. Significant changes were observed for the su... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5325291 Mon, 17 Oct 2011 04:00:00 +0100 5325291 http://www.medworm.com/index.php?rid=5379647&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21992463%26dopt%3DAbstract Authors: El Hajjaji FZ, Pelletier A, Delanaud S, Libert JP, Bach V, Loos N Abstract Given the liver's importance in controlling metabolic homeostasis in mammals, we sought to establish (i) whether the thermal status of this organ was involved in the link between sleep, thermoregulation and food intake and (ii) how the hypothalamic structures affect the functional interactions between processes involved in regulation of the body's energy balance. In 10 freely moving rats, the liver was heated artificially to and maintained at set-point temperatures of 39.5, 40.0 and 40.5 °C for 4 h. Each animal's feeding activity, cortical temperature and brown adipose tissue (T(BAT) ) temperature were measured continuously. Sleep organization and wakefulness were scored from electroencephalogr... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5379647 Thu, 13 Oct 2011 04:00:00 +0100 5379647 http://www.medworm.com/index.php?rid=5312418&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21988168%26dopt%3DAbstract Authors: Björnsdóttir E, Janson C, Gíslason T, Sigurdsson JF, Pack AI, Gehrman P, Benediktsdóttir B Abstract Insomnia and obstructive sleep apnea (OSA) often coexist, but the nature of their relationship is unclear. The aims of this study were to compare the prevalence of initial and middle insomnia between OSA patients and controls from the general population as well as to study the influence of insomnia on sleepiness and quality of life in OSA patients. Two groups were compared, untreated OSA patients (n = 824) and controls ≥ 40 years from the general population in Iceland (n = 762). All subjects answered the same questionnaires on health and sleep and OSA patients underwent a sleep study. Altogether, 53% of controls were males compared to 81% of OSA patients. D... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5312418 Wed, 12 Oct 2011 04:00:00 +0100 5312418 http://www.medworm.com/index.php?rid=5312421&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21988087%26dopt%3DAbstract We examined the effects of acute sleep restriction (nap deprivation) on toddlers' emotion expression. Ten healthy children (seven females; 30-36 months old) followed a strict sleep schedule (≥12.5 h time in bed per 24-h) for 5 days, before each of two randomly assigned afternoon emotion assessments following Nap and No-Nap conditions (resulting in an 11-day protocol). Children viewed emotion-eliciting pictures (five positive, three neutral, three negative) and completed puzzles (one solvable, one unsolvable). Children's faces were video-recorded, and emotion displays were coded. When sleep restricted, children displayed less confusion in response to neutral pictures, more negativity to neutral and negative pictures, and less positivity to positive pictures. Sleep restriction also... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5312421 Tue, 11 Oct 2011 04:00:00 +0100 5312421 http://www.medworm.com/index.php?rid=5312420&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21988108%26dopt%3DAbstract Authors: Chambe J, Laib S, Hubbard J, Erhardt C, Ruppert E, Schroder C, Malan A, Bourcier T, Bourgin P Abstract A few investigations have raised the question of a possible relationship between obstructive sleep apnoea syndrome (OSAS) and floppy eyelid syndrome (FES). FES is an easily inverted floppy eyelid with papillary conjunctivis, and is a subset of the general pathology, lax eyelid syndrome. The aim of the current study is to determine whether OSAS severity is associated with FES. One hundred and 27 consecutive subjects (aged 25-75 years) referred to the Strasbourg University Sleep Clinic with suspicion of OSAS were included. All patients underwent overnight ambulatory respiratory polygraphy, comprehensive ophthalmological examination and completed standard sleep questionnai... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5312420 Tue, 11 Oct 2011 04:00:00 +0100 5312420 http://www.medworm.com/index.php?rid=5312419&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21988137%26dopt%3DAbstract This study aimed to identify pre-treatment and immediate early treatment factors predicting continuous positive airway pressure (CPAP) use during the first week of therapy, when the pattern of non-adherence is established. Four domains of potential predictors were examined: pre-treatment demographic and clinical factors, patients' perceived self-efficacy, treatment delivery (mask leak and bothering side effects) and immediate disease reduction (residual respiratory events and flow limitation). The Autoset™ Clinical System objectively documented daily CPAP use, mask leak, residual respiratory events and flow limitation. Ninety-one CPAP-naive patients with newly diagnosed obstructive sleep apnea were followed for 1 week after treatment initiation. Mean CPAP daily use during the first wee... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5312419 Tue, 11 Oct 2011 04:00:00 +0100 5312419 http://www.medworm.com/index.php?rid=5305854&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00962.x We examined the effects of acute sleep restriction (nap deprivation) on toddlers’ emotion expression. Ten healthy children (seven females; 30–36 months old) followed a strict sleep schedule (≥12.5 h time in bed per 24‐h) for 5 days, before each of two randomly assigned afternoon emotion assessments following Nap and No‐Nap conditions (resulting in an 11‐day protocol). Children viewed emotion‐eliciting pictures (five positive, three neutral, three negative) and completed puzzles (one solvable, one unsolvable). Children’s faces were video‐recorded, and emotion displays were coded. When sleep restricted, children displayed less confusion in response to neutral pictures, more negativity to neutral and negative pictures, and less positivity to positive pictures. Sleep ... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5305854 Tue, 11 Oct 2011 04:00:00 +0100 5305854 http://www.medworm.com/index.php?rid=5305853&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00968.x SummaryA few investigations have raised the question of a possible relationship between obstructive sleep apnoea syndrome (OSAS) and floppy eyelid syndrome (FES). FES is an easily inverted floppy eyelid with papillary conjunctivis, and is a subset of the general pathology, lax eyelid syndrome. The aim of the current study is to determine whether OSAS severity is associated with FES. One hundred and 27 consecutive subjects (aged 25–75 years) referred to the Strasbourg University Sleep Clinic with suspicion of OSAS were included. All patients underwent overnight ambulatory respiratory polygraphy, comprehensive ophthalmological examination and completed standard sleep questionnaires. OSAS severity was defined based on the patient’s obstructive apnoea–hypopnoea index (AHI). As expected... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5305853 Tue, 11 Oct 2011 04:00:00 +0100 5305853 http://www.medworm.com/index.php?rid=5305852&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00969.x This study aimed to identify pre‐treatment and immediate early treatment factors predicting continuous positive airway pressure (CPAP) use during the first week of therapy, when the pattern of non‐adherence is established. Four domains of potential predictors were examined: pre‐treatment demographic and clinical factors, patients’ perceived self‐efficacy, treatment delivery (mask leak and bothering side effects) and immediate disease reduction (residual respiratory events and flow limitation). The Autoset™ Clinical System objectively documented daily CPAP use, mask leak, residual respiratory events and flow limitation. Ninety‐one CPAP‐naive patients with newly diagnosed obstructive sleep apnea were followed for 1 week after treatment initiation. Mean CPAP daily use during... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5305852 Tue, 11 Oct 2011 04:00:00 +0100 5305852 http://www.medworm.com/index.php?rid=5312422&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21981420%26dopt%3DAbstract Authors: Spiegelhalder K, Regen W, Kyle SD, Endres D, Nissen C, Feige B, Riemann D Abstract Primary insomnia is a prevalent sleep disorder affecting approximately 3% of the general population. Studies suggest that personality traits such as perfectionism and neuroticism might be implicated in the aetiology of the disorder. However, to date, no study has investigated behavioural indicators of these factors in a hypothesis-driven manner. In the present study, we assessed punctuality as a behavioural indicator of perfectionism and neuroticism in 635 consecutive clinical patients of the sleep laboratory of the Department of Psychiatry and Psychotherapy, University of Freiburg Medical Center. The primary aim was to compare primary insomnia patients (n = 148) with another group of pa... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5312422 Sat, 08 Oct 2011 04:00:00 +0100 5312422 http://www.medworm.com/index.php?rid=5389795&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00982.x SummaryThe hypothesis of whether day length (photoperiod) is an important zeitgeber (time‐giver) for keeping the circadian rhythm entrained to a 24‐hour cycle was examined, as was its association with sleep patterns and mood problems. Data were collected prospectively from a site with very large differences in daylight duration across seasons (Tromsø in Norway, 69°39′N) and a site with very small seasonal differences in daylight duration (Ghana in Accra, 5°32′N). Two hundred subjects were recruited from both sites in January. At the follow‐up in August, 180 and 150 subjects in Ghana and Norway participated, respectively. Use of a weekly sleep diary indicated low to moderately strong seasonal changes in rise‐ and bedtime, sleep efficiency and sleep onset latency only in the n... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5389795 Sat, 01 Oct 2011 04:00:00 +0100 5389795 http://www.medworm.com/index.php?rid=5338055&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00974.x SummaryObstructive sleep apnoea syndrome is a common clinical problem. Positional sleep apnoea syndrome, defined as having a supine apnoea–hypopnoea index of twice or more compared to the apnoea–hypopnoea index in the other positions, occurs in 56% of obstructive sleep apnoea patients. A limited number of studies focus on decreasing the severity of sleep apnoea by influencing sleep position. In these studies an object was strapped to the back (tennis balls, squash balls, special vests), preventing patients from sleeping in the supine position. Frequently, this was not successful due to arousals while turning from one lateral position to the other, thereby disturbing sleep architecture and sleep quality. We developed a new neck‐worn device which influences sleep position by offering a... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5338055 Sat, 01 Oct 2011 04:00:00 +0100 5338055 http://www.medworm.com/index.php?rid=5325290&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00976.x In conclusion, it is important to question sleep disorder followed by a polysomnography, if necessary, in order to improve quality of life and fatigue in Behçet’s disease. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5325290 Sat, 01 Oct 2011 04:00:00 +0100 5325290 http://www.medworm.com/index.php?rid=5316803&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00973.x SummaryGiven the liver’s importance in controlling metabolic homeostasis in mammals, we sought to establish (i) whether the thermal status of this organ was involved in the link between sleep, thermoregulation and food intake and (ii) how the hypothalamic structures affect the functional interactions between processes involved in regulation of the body’s energy balance. In 10 freely moving rats, the liver was heated artificially to and maintained at set‐point temperatures of 39.5, 40.0 and 40.5 °C for 4 h. Each animal’s feeding activity, cortical temperature and brown adipose tissue (TBAT) temperature were measured continuously. Sleep organization and wakefulness were scored from electroencephalograms. Each animal served as its own control. Heating the liver induced a decrease... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5316803 Sat, 01 Oct 2011 04:00:00 +0100 5316803 http://www.medworm.com/index.php?rid=5305851&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00972.x SummaryInsomnia and obstructive sleep apnea (OSA) often coexist, but the nature of their relationship is unclear. The aims of this study were to compare the prevalence of initial and middle insomnia between OSA patients and controls from the general population as well as to study the influence of insomnia on sleepiness and quality of life in OSA patients. Two groups were compared, untreated OSA patients (n = 824) and controls ≥ 40 years from the general population in Iceland (n = 762). All subjects answered the same questionnaires on health and sleep and OSA patients underwent a sleep study. Altogether, 53% of controls were males compared to 81% of OSA patients. Difficulties maintaining sleep (DMS) were more common among men and women with OSA compared to the general populati... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5305851 Sat, 01 Oct 2011 04:00:00 +0100 5305851 http://www.medworm.com/index.php?rid=5298183&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00970.x SummaryPrimary insomnia is a prevalent sleep disorder affecting approximately 3% of the general population. Studies suggest that personality traits such as perfectionism and neuroticism might be implicated in the aetiology of the disorder. However, to date, no study has investigated behavioural indicators of these factors in a hypothesis‐driven manner. In the present study, we assessed punctuality as a behavioural indicator of perfectionism and neuroticism in 635 consecutive clinical patients of the sleep laboratory of the Department of Psychiatry and Psychotherapy, University of Freiburg Medical Center. The primary aim was to compare primary insomnia patients (n = 148) with another group of patients with other sleep‐related diagnoses (n = 487). Primary insomnia patients arrive... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5298183 Sat, 01 Oct 2011 04:00:00 +0100 5298183 http://www.medworm.com/index.php?rid=5275557&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00977.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5275557 Sat, 01 Oct 2011 04:00:00 +0100 5275557 http://www.medworm.com/index.php?rid=5275556&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00954.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5275556 Sat, 01 Oct 2011 04:00:00 +0100 5275556 http://www.medworm.com/index.php?rid=5275555&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00953.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5275555 Sat, 01 Oct 2011 04:00:00 +0100 5275555 http://www.medworm.com/index.php?rid=5275554&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00952.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5275554 Sat, 01 Oct 2011 04:00:00 +0100 5275554 http://www.medworm.com/index.php?rid=5275553&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00951.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5275553 Sat, 01 Oct 2011 04:00:00 +0100 5275553 http://www.medworm.com/index.php?rid=5275552&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00950.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5275552 Sat, 01 Oct 2011 04:00:00 +0100 5275552 http://www.medworm.com/index.php?rid=5275551&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00949.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5275551 Sat, 01 Oct 2011 04:00:00 +0100 5275551 http://www.medworm.com/index.php?rid=5275550&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00960.x SummaryFluctuations in sleep/wake state have been proposed as an important mechanism contributing to the development of oscillatory breathing patterns, including Cheyne–Stokes respiration in patients with heart failure. In order to properly assess the interactions between changes in state and changes in ventilatory parameters, a methodology capable of continuously and reliably detecting state transitions is needed. Traditional fixed‐epoch analysis of polysomnographic recordings is not suitable for this purpose. Moreover, visual identification of changes in the dominant electroencephalogram activity at the transition from wakefulness to sleep and vice versa is often very subjective. We have therefore developed a hybrid approach – including both visual scoring and computer‐based proc... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5275550 Sat, 01 Oct 2011 04:00:00 +0100 5275550 http://www.medworm.com/index.php?rid=5275549&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00961.x SummarySleep bruxism is a sleep‐related movement disorder that can be responsible for various pains and dysfunctions in the orofacial region. The aim of the current case–control association study was to investigate the association of genetic, psychological and behavioral factors with sleep bruxism in a Japanese population. Non‐related participants were recruited and divided into either a sleep bruxism group (n = 66) or control group (n = 48) by clinical diagnoses and 3‐night masseter electromyographic recordings by means of a portable miniature device. The Epworth Sleepiness Scale, Temperament and Character Inventory, NEO‐Five Factor Inventory and custom‐made questionnaires that asked about familial aggregation, alcohol intake, caffeine intake, cigarette smoking, past s... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5275549 Sat, 01 Oct 2011 04:00:00 +0100 5275549 http://www.medworm.com/index.php?rid=5275548&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00971.x In conclusion, children treated for a CNS tumour have increased somnolence, significantly increasing fatigue and worsening daily functioning. Further investigation should focus on possibilities to improve sleep quality and diminish fatigue. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5275548 Sat, 01 Oct 2011 04:00:00 +0100 5275548 http://www.medworm.com/index.php?rid=5279875&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21955148%26dopt%3DAbstract Authors: Bianchi MT, Eiseman NA, Cash SS, Mietus J, Peng CK, Thomas RJ Abstract Sleep fragmentation of any cause is disruptive to the rejuvenating value of sleep. However, methods to quantify sleep architecture remain limited. We have previously shown that human sleep-wake stage distributions exhibit multi-exponential dynamics, which are fragmented by obstructive sleep apnea (OSA), suggesting that Markov models may be a useful method to quantify architecture in health and disease. Sleep stage data were obtained from two subsets of the Sleep Heart Health Study database: control subjects with no medications, no OSA, no medical co-morbidities and no sleepiness (n = 374); and subjects with severe OSA (n = 338). Sleep architecture was simplified into three stages: wake after sle... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5279875 Wed, 28 Sep 2011 04:00:00 +0100 5279875 http://www.medworm.com/index.php?rid=5279874&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21955170%26dopt%3DAbstract Authors: Ferri R, Bruni O, Fulda S, Zucconi M, Plazzi G Abstract The current definition of rapid eye movement (REM) sleep without atonia has no quantitative character, and cut-off values above which the level of electromyographic tone can be considered to be 'excessive' are unclear. The aim of this study was to analyse the characteristics of chin electromyographic amplitude by means of an automatic approach in a large group of normal controls, subdivided into different age groups. Eighty-eight normal controls were included, subdivided into six age groups: preschoolers (≤6 years); schoolers (6-10 years); preadolescents (10-13 years); young adults (24-40 years); middle-aged (58-65 years); and old (>65 years). The average amplitude of the rectified submentalis muscle ... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5279874 Wed, 28 Sep 2011 04:00:00 +0100 5279874 http://www.medworm.com/index.php?rid=5279873&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21955220%26dopt%3DAbstract Authors: Mokhlesi B, Pannain S, Ghods F, Knutson KL Abstract Slow-wave sleep has been associated with several physiological phenomena, including glucose metabolism, sympathetic nervous system activity, hormonal secretion and blood pressure regulation. The aim of these analyses was to determine which sociodemographic and medical factors were associated with slow-wave sleep duration in a large clinical sample. We conducted cross-sectional analysis of clinical data from 1019 consecutive adults over a 10-month period who had their first in-laboratory polysomnogram for suspicion of obstructive sleep apnea. Patients either underwent in-laboratory full-night polysomnogram followed by full-night continuous positive airway pressure titration or split-night polysomnogram. Patients also compl... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5279873 Wed, 28 Sep 2011 04:00:00 +0100 5279873 http://www.medworm.com/index.php?rid=5262501&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00937.x SummarySleep fragmentation of any cause is disruptive to the rejuvenating value of sleep. However, methods to quantify sleep architecture remain limited. We have previously shown that human sleep–wake stage distributions exhibit multi‐exponential dynamics, which are fragmented by obstructive sleep apnea (OSA), suggesting that Markov models may be a useful method to quantify architecture in health and disease. Sleep stage data were obtained from two subsets of the Sleep Heart Health Study database: control subjects with no medications, no OSA, no medical co‐morbidities and no sleepiness (n = 374); and subjects with severe OSA (n = 338). Sleep architecture was simplified into three stages: wake after sleep onset (WASO); non‐rapid eye movement (NREM) sleep; and rapid eye movem... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5262501 Wed, 28 Sep 2011 04:00:00 +0100 5262501 http://www.medworm.com/index.php?rid=5262500&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00958.x SummaryThe current definition of rapid eye movement (REM) sleep without atonia has no quantitative character, and cut‐off values above which the level of electromyographic tone can be considered to be ‘excessive’ are unclear. The aim of this study was to analyse the characteristics of chin electromyographic amplitude by means of an automatic approach in a large group of normal controls, subdivided into different age groups. Eighty‐eight normal controls were included, subdivided into six age groups: preschoolers (≤6 years); schoolers (6–10 years); preadolescents (10–13 years); young adults (24–40 years); middle‐aged (58–65 years); and old (>65 years). The average amplitude of the rectified submentalis muscle electromyographic signal was used for the comput... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5262500 Wed, 28 Sep 2011 04:00:00 +0100 5262500 http://www.medworm.com/index.php?rid=5246598&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21923731%26dopt%3DAbstract This study provides initial evidence that differential protein expression occurs in adults with OSA, and that such proteins change according to disease severity, and appear to primarily involve lipid and vascular metabolic pathways. PMID: 21923731 [PubMed - as supplied by publisher] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5246598 Sat, 17 Sep 2011 04:00:00 +0100 5246598 http://www.medworm.com/index.php?rid=5229997&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21917047%26dopt%3DAbstract Authors: Lindner A, Fornadi K, Lazar AS, Czira ME, Dunai A, Zoller R, Veber O, Szentkiralyi A, Kiss Z, Toronyi E, Mucsi I, Novak M, Molnar MZ Abstract Periodic limb movements in sleep (PLMS) is prevalent among dialysed patients and is associated with increased risk of mortality. Our study aimed to determine the prevalence of this disease in a sample of transplanted and waiting-list haemodialysed patients. One hundred transplanted and 50 waiting-list patients underwent polysomnography. Moderate and severe diseases were defined as periodic limb movements in sleep index (PLMSI) higher than 15 and 25 events h(-1) , respectively. The 10-year coronary heart disease risk was estimated for all patients using the Framingham Score. Moreover, the 10-year estimated risk of stroke was calculate... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5229997 Wed, 14 Sep 2011 04:00:00 +0100 5229997 http://www.medworm.com/index.php?rid=5228008&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00956.x SummaryPeriodic limb movements in sleep (PLMS) is prevalent among dialysed patients and is associated with increased risk of mortality. Our study aimed to determine the prevalence of this disease in a sample of transplanted and waiting‐list haemodialysed patients. One hundred transplanted and 50 waiting‐list patients underwent polysomnography. Moderate and severe diseases were defined as periodic limb movements in sleep index (PLMSI) higher than 15 and 25 events h−1, respectively. The 10‐year coronary heart disease risk was estimated for all patients using the Framingham Score. Moreover, the 10‐year estimated risk of stroke was calculated according to the modified version of the Framingham Stroke Risk Profile. PLMS was present in 27% of the transplanted and 42% of the waiting‐l... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5228008 Wed, 14 Sep 2011 04:00:00 +0100 5228008 http://www.medworm.com/index.php?rid=5228009&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00957.x SummaryCentral nervous system (CNS) histamine is low in individuals with narcolepsy, a disease characterized by severe fragmentation of both sleep and wake. We have developed a primate model, the squirrel monkey, with which we can examine the role of the CNS in the wake‐consolidation process, as these primates are day‐active, have consolidated wake and sleep and have cerebrospinal fluid (CSF) that is readily accessible. Using this model and three distinct protocols, we report herein on the role of CNS histamine in the wake consolidation process. CSF histamine has a robust daily rhythm, with a mean of 24.9 ± 3.29 pg mL−1, amplitude of 31.7 ± 6.46 pg mL−1 and a peak at 17:49 ± 70.3 min (lights on 07:00–19:00 hours). These levels are not significantly affect... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5228009 Tue, 13 Sep 2011 04:00:00 +0100 5228009 http://www.medworm.com/index.php?rid=5218920&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21910776%26dopt%3DAbstract Authors: Zeitzer JM, Kodama T, Buckmaster CL, Honda Y, Lyons DM, Nishino S, Mignot E Abstract Central nervous system (CNS) histamine is low in individuals with narcolepsy, a disease characterized by severe fragmentation of both sleep and wake. We have developed a primate model, the squirrel monkey, with which we can examine the role of the CNS in the wake-consolidation process, as these primates are day-active, have consolidated wake and sleep and have cerebrospinal fluid (CSF) that is readily accessible. Using this model and three distinct protocols, we report herein on the role of CNS histamine in the wake consolidation process. CSF histamine has a robust daily rhythm, with a mean of 24.9 ± 3.29 pg mL(-1) , amplitude of 31.7 ± 6.46 pg mL(-1) and a peak at 17:49�... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5218920 Tue, 13 Sep 2011 04:00:00 +0100 5218920 http://www.medworm.com/index.php?rid=5218921&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21895822%26dopt%3DAbstract Authors: Svensson M, Venge P, Janson C, Lindberg E Abstract Sleep-disordered breathing (SDB) is a risk factor for cardiovascular disease (CVD). The underlying pathogenesis is not clear. In patients with obstructive sleep apnoea syndrome (OSAS) elevated levels of inflammatory markers, such as C-reactive protein (CRP), interleukin-6 (IL-6) and tumour necrosis factor α (TNFα) have been found. These markers have also been shown as independent markers of CVD in other populations. The aim of the study was to investigate the association between SDB and systemic inflammation in a population-based cohort of women. From 6817 women who previously answered a questionnaire concerning snoring habits, 230 habitually snoring women and 170 women regardless of snoring status went through polysomno... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5218921 Tue, 06 Sep 2011 04:00:00 +0100 5218921 http://www.medworm.com/index.php?rid=5192905&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21883593%26dopt%3DAbstract Authors: Dodig IP, Pecotic R, Valic M, Dogas Z Abstract Obstructive sleep apnoea (OSA) is characterized by periods of upper airway collapse accompanied by repeated episodes of hypoxia. In experimental animals repeated bouts of hypoxia may evoke sustained augmentation of phrenic nerve activity, known as phrenic long-term facilitation (pLTF). This form of physiological compensation might contribute to stable breathing, minimizing the occurrence of apnoeas and/or hypopnoeas during sleep in patients with OSA. Serotonin (5-HT) has been shown to modulate respiratory neuronal activity, possibly via projections originating in the raphe nuclei. Our model focuses on the effects of 5-HT(1A) receptors blockade by selective antagonist WAY-100635 into the caudal raphe region on phrenic long-term... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5192905 Thu, 01 Sep 2011 23:00:00 +0100 5192905 http://www.medworm.com/index.php?rid=5262499&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00959.x SummarySlow‐wave sleep has been associated with several physiological phenomena, including glucose metabolism, sympathetic nervous system activity, hormonal secretion and blood pressure regulation. The aim of these analyses was to determine which sociodemographic and medical factors were associated with slow‐wave sleep duration in a large clinical sample. We conducted cross‐sectional analysis of clinical data from 1019 consecutive adults over a 10‐month period who had their first in‐laboratory polysomnogram for suspicion of obstructive sleep apnea. Patients either underwent in‐laboratory full‐night polysomnogram followed by full‐night continuous positive airway pressure titration or split‐night polysomnogram. Patients also completed questionnaires to assess race, educatio... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5262499 Thu, 01 Sep 2011 04:00:00 +0100 5262499 http://www.medworm.com/index.php?rid=5228007&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00955.x This study provides initial evidence that differential protein expression occurs in adults with OSA, and that such proteins change according to disease severity, and appear to primarily involve lipid and vascular metabolic pathways. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5228007 Thu, 01 Sep 2011 04:00:00 +0100 5228007 http://www.medworm.com/index.php?rid=5197525&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00946.x SummarySleep‐disordered breathing (SDB) is a risk factor for cardiovascular disease (CVD). The underlying pathogenesis is not clear. In patients with obstructive sleep apnoea syndrome (OSAS) elevated levels of inflammatory markers, such as C‐reactive protein (CRP), interleukin‐6 (IL‐6) and tumour necrosis factor α (TNFα) have been found. These markers have also been shown as independent markers of CVD in other populations. The aim of the study was to investigate the association between SDB and systemic inflammation in a population‐based cohort of women. From 6817 women who previously answered a questionnaire concerning snoring habits, 230 habitually snoring women and 170 women regardless of snoring status went through polysomnography, anthropometric measurements and blood sampl... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5197525 Wed, 31 Aug 2011 23:00:00 +0100 5197525 http://www.medworm.com/index.php?rid=5185539&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00948.x SummaryObstructive sleep apnoea (OSA) is characterized by periods of upper airway collapse accompanied by repeated episodes of hypoxia. In experimental animals repeated bouts of hypoxia may evoke sustained augmentation of phrenic nerve activity, known as phrenic long‐term facilitation (pLTF). This form of physiological compensation might contribute to stable breathing, minimizing the occurrence of apnoeas and/or hypopnoeas during sleep in patients with OSA. Serotonin (5‐HT) has been shown to modulate respiratory neuronal activity, possibly via projections originating in the raphe nuclei. Our model focuses on the effects of 5‐HT1A receptors blockade by selective antagonist WAY‐100635 into the caudal raphe region on phrenic long‐term facilitation after exposure to acute intermitten... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5185539 Wed, 31 Aug 2011 23:00:00 +0100 5185539 http://www.medworm.com/index.php?rid=5164360&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00945.x SummaryNeurons that release hypocretin (HCRT; orexin) peptides control wake–sleep states and autonomic functions, and are lost in patients with narcolepsy with cataplexy. Bursts of high‐amplitude electroencephalographic (EEG) activity have been reported during behavioural arrests and rapid eye movement sleep (REMS) episodes at sleep onset in HCRT‐deficient narcoleptic mice. Quantitative information on these EEG phenomena is lacking. We aimed to quantify EEG frequency, occurrence rate, daily rhythm and cardiovascular correlates of high‐amplitude EEG bursts during REMS and cataplexy. Twenty HCRT‐deficient mice and 15 congenic wild‐type controls were instrumented with electrodes for sleep recordings and a telemetric blood pressure transducer. Short (1–2 s) high‐amplitude bur... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5164360 Sat, 27 Aug 2011 17:41:14 +0100 5164360 http://www.medworm.com/index.php?rid=5147608&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00944.x SummaryThe availability of a reliable system to record sleep stage measures easily and automatically in ambulatory settings could be of utility for research and clinical work. The aim of this study was to evaluate a novel wireless system (WS) that does not require skilled preparation for the automatic collection and scoring of human sleep. Twenty‐nine healthy adults underwent concurrent sleep measurement via the WS, polysomnography (PSG) and an actigraph (ACT) in a sleep laboratory for one assessment night preceded by an acclimation night. The PSG recordings were scored by two experienced trained technicians from separate laboratories. Each recording was scored by both technicians to Rechtschaffen and Kales (R&K) criteria. The WS and ACT were compared with each of the PSG scores and ... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5147608 Wed, 24 Aug 2011 13:47:42 +0100 5147608 http://www.medworm.com/index.php?rid=5147610&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00940.x SummaryInsomnia is a very common and disabling symptom. Whilst evidence for the efficacy of cognitive behavioural therapy for people diagnosed with insomnia (CBT‐I) is strong, few people seek help and not many services offer CBT‐I. Less intensive adaptations of CBT‐I have been shown to be valuable, and given the size of the problem and low rates of help‐seeking, an accessible intervention with a large capacity is needed. Day‐long CBT‐I psycho‐educational workshops (each for up to 30 people), to which members of the public with insomnia symptoms could self‐refer, have been developed. This randomised controlled trial aimed to evaluate the effectiveness of these workshops. Baseline measures were taken from 151 participants, who were then randomised to experimental or waiting�... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5147610 Wed, 17 Aug 2011 23:00:00 +0100 5147610 http://www.medworm.com/index.php?rid=5147609&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00947.x SummaryAgeing is associated with marked changes in sleep timing, structure and electroencephalographic (EEG) activity. Older people exhibit less slow‐wave and spindle activity during non‐rapid eye movement (NREM) sleep, together with attenuated levels of rapid eye movement (REM) sleep as compared to young individuals. However, the extent to which these age‐related changes in sleep impact on dream processing remains largely unknown. Here we investigated NREM and REM sleep EEG activity prior to dream recall and no recall in 17 young (20–31 years) and 15 older volunteers (57–74 years) during a 40 h multiple nap protocol. Dream recall was assessed immediately after each nap. During NREM sleep prior to dream recall, older participants displayed higher frontal EEG delta activity ... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5147609 Wed, 17 Aug 2011 23:00:00 +0100 5147609 http://www.medworm.com/index.php?rid=5133637&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00943.x In conclusion, a majority of patients with narcolepsy suffer from severe fatigue, which can be distinguished from daytime sleepiness, and results in severe functional impairment. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5133637 Wed, 17 Aug 2011 03:10:40 +0100 5133637 http://www.medworm.com/index.php?rid=5133638&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00939.x This study characterizes hypnagogic hallucinations reported during a polygraphically recorded 90‐min daytime nap following or preceding practice of the computer game Tetris. In the experimental group (N = 16), participants played Tetris in the morning for 2 h during three consecutive days, while in a first control group (N = 13, controlling the effect of experience) participants did not play any game, and in a second control group (N = 14, controlling the effect of anticipation) participants played Tetris after the nap. During afternoon naps, participants were repetitively awakened 15, 45, 75, 120 or 180 s after the onset of S1, and were asked to report their mental content. Reports content was scored by three judges (inter‐rater reliability 85%). In the experimental gr... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5133638 Mon, 15 Aug 2011 23:00:00 +0100 5133638 http://www.medworm.com/index.php?rid=5111309&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00942.x SummaryWe compared periodic and non‐periodic leg movements during sleep and polysomnography in patients with narcolepsy with cataplexy (NC) with or without restless legs syndrome (RLS) with matched idiopathic RLS (iRLS) and control subjects. We enrolled 100 patients with NC: 17 having RLS were compared with 34 sex‐ and age‐matched patients without RLS and with 17 normal controls and 17 iRLS subjects. Periodic leg movements were highest in iRLS and lowest in controls, with those in NC with RLS very close to iRLS, but higher than those in NC without RLS. The periodicity indexes showed the highest value in iRLS followed by NC with or without RLS and, finally, by controls. The inter‐leg movement intervals peaked between 10 and 50 s in NC with RLS and in iRLS, the former did not displ... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5111309 Wed, 10 Aug 2011 22:01:33 +0100 5111309 http://www.medworm.com/index.php?rid=5101561&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21790822%26dopt%3DAbstract Authors: Dijk DJ The sleep-deprivation paradigm remains a powerful approach in the study of the functions of sleep. When combined with the assessment of novel dependent measures or integration of multiple standard variables new insights may be obtained. This issue of the Journal of Sleep Research contains several studies that shed some new light on the effects of sleep deprivation and sleepiness. In addition, several papers emphasize the need to better characterize and understand the consequences of insomnia. PMID: 21790822 [PubMed - in process] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5101561 Sun, 07 Aug 2011 01:00:17 +0100 5101561 http://www.medworm.com/index.php?rid=5099076&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00938.x SummaryMotor activity in rapid eye movement (REM) sleep behaviour disorder (RBD) has been linked to dream content. Systematic and controlled sleep laboratory studies directly assessing the relation between RBD behaviours and experienced dream content are, however, largely lacking. We aimed to investigate whether a link can be established between RBD behaviours and dream content when both are systematically sampled in a controlled setting. We investigated six patients with Parkinson syndrome and RBD who underwent 2–3 nights of video–polysomnographic recording during which they were awakened from REM sleep (10 min after the onset of the second and successive REM periods). Spontaneous free‐worded dream reports and a structured dream questionnaire were obtained. Video recordings of mot... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5099076 Sat, 06 Aug 2011 18:24:30 +0100 5099076 http://www.medworm.com/index.php?rid=5101560&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21815957%26dopt%3DAbstract Authors: Valli K, Frauscher B, Gschliesser V, Wolf E, Falkenstetter T, Schönwald SV, Ehrmann L, Zangerl A, Marti I, Boesch SM, Revonsuo A, Poewe W, Högl B Motor activity in rapid eye movement (REM) sleep behaviour disorder (RBD) has been linked to dream content. Systematic and controlled sleep laboratory studies directly assessing the relation between RBD behaviours and experienced dream content are, however, largely lacking. We aimed to investigate whether a link can be established between RBD behaviours and dream content when both are systematically sampled in a controlled setting. We investigated six patients with Parkinson syndrome and RBD who underwent 2-3 nights of video-polysomnographic recording during which they were awakened from REM sleep (10 min after the onset of the s... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5101560 Wed, 03 Aug 2011 23:00:00 +0100 5101560 http://www.medworm.com/index.php?rid=5064859&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00941.x The sleep‐deprivation paradigm remains a powerful approach in the study of the functions of sleep. When combined with the assessment of novel dependent measures or integration of multiple standard variables new insights may be obtained. This issue of the Journal of Sleep Research contains several studies that shed some new light on the effects of sleep deprivation and sleepiness. In addition, several papers emphasize the need to better characterize and understand the consequences of insomnia. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5064859 Tue, 26 Jul 2011 21:33:44 +0100 5064859 http://www.medworm.com/index.php?rid=5053796&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21752133%26dopt%3DAbstract Authors: Eiseman NA, Westover MB, Mietus JE, Thomas RJ, Bianchi MT Identifying predictors of subjective sleepiness and severity of sleep apnea are important yet challenging goals in sleep medicine. Classification algorithms may provide insights, especially when large data sets are available. We analyzed polysomnography and clinical features available from the Sleep Heart Health Study. The Epworth Sleepiness Scale and the apnea-hypopnea index were the targets of three classifiers: k-nearest neighbor, naive Bayes and support vector machine algorithms. Classification was based on up to 26 features including demographics, polysomnogram, and electrocardiogram (spectrogram). Naive Bayes was best for predicting abnormal Epworth class (0-10 versus 11-24), although prediction was weak: polysomn... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5053796 Wed, 13 Jul 2011 23:00:00 +0100 5053796 http://www.medworm.com/index.php?rid=5053795&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21752134%26dopt%3DAbstract In conclusion, the current study suggested that self-reported snoring is associated significantly with carotid bifurcation intima-media thickness and the presence of plaque, independent of traditional cardiovascular risk factors. PMID: 21752134 [PubMed - as supplied by publisher] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5053795 Wed, 13 Jul 2011 23:00:00 +0100 5053795 http://www.medworm.com/index.php?rid=5031857&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00935.x SummaryIdentifying predictors of subjective sleepiness and severity of sleep apnea are important yet challenging goals in sleep medicine. Classification algorithms may provide insights, especially when large data sets are available. We analyzed polysomnography and clinical features available from the Sleep Heart Health Study. The Epworth Sleepiness Scale and the apnea–hypopnea index were the targets of three classifiers: k‐nearest neighbor, naive Bayes and support vector machine algorithms. Classification was based on up to 26 features including demographics, polysomnogram, and electrocardiogram (spectrogram). Naive Bayes was best for predicting abnormal Epworth class (0–10 versus 11–24), although prediction was weak: polysomnogram features had 16.7% sensitivity and 88.8% specifici... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5031857 Wed, 13 Jul 2011 23:00:00 +0100 5031857 http://www.medworm.com/index.php?rid=5007055&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21702865%26dopt%3DAbstract This study was designed to examine perceptions of sleep quality in addition to actigraphy- and diary-measured sleep variables in healthy girls at low and high familial risk for major depressive disorder. Forty-four healthy daughters and their mothers completed a week of daily sleep diary and actigraphy; 24 girls had mothers with no history of psychopathology (low risk, mean age 14.92 years), and 20 girls had mothers with recurrent depression during the daughter's lifetime (high risk, mean age 14.12 years). All daughters had no current or past psychopathology. High-risk girls reported significantly poorer subjective sleep quality than did low-risk girls (P = 0.001). The two groups of participants did not differ in actigraphy- or diary-measured sleep duration, onset latency or snooze... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5007055 Sun, 26 Jun 2011 23:00:00 +0100 5007055 http://www.medworm.com/index.php?rid=5007054&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21707809%26dopt%3DAbstract In conclusion, the electronic diary and the paper diary are valid and well-accepted methods for the assessment of infant sleep. Parents preferred the electronic diary but, conversely, they were less compliant in completing it. PMID: 21707809 [PubMed - as supplied by publisher] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5007054 Sun, 26 Jun 2011 23:00:00 +0100 5007054 http://www.medworm.com/index.php?rid=4971569&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00926.x In conclusion, the electronic diary and the paper diary are valid and well‐accepted methods for the assessment of infant sleep. Parents preferred the electronic diary but, conversely, they were less compliant in completing it. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4971569 Sun, 26 Jun 2011 23:00:00 +0100 4971569 http://www.medworm.com/index.php?rid=4960830&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21679260%26dopt%3DAbstract Authors: Donjacour CE, Fronczek R, LE Cessie S, Lammers GJ, VAN Dijk JG The month of birth has been proposed as a risk factor for narcolepsy, suggesting a harmful influence during early development. Several authors have described an excess of births in March in those developing narcolepsy later. Analysis methods in published studies varied, but no study corrected completely for possible changes in seasonal birth pattern over time in the appropriate population. The present study describes changes in seasonal birth pattern of the entire Dutch population over a 79-year span and compared the monthly birth pattern of Dutch narcoleptics with the population data. Month and year of birth were noted for 307 patients with non-familial narcolepsy with cataplexy, born in the Netherlands between 19... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4960830 Wed, 15 Jun 2011 23:00:00 +0100 4960830 http://www.medworm.com/index.php?rid=4960833&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21668806%26dopt%3DAbstract Authors: Wang D, Marshall NS, Duffin J, Yee BJ, Wong KK, Noori N, Ng SS, Grunstein RR Centrally active agents have a variable impact in patients with obstructive sleep apnoea (OSA) that is unexplained. How to phenotype the individual OSA response is clinically important, as it may help to identify who will be at risk of respiratory depression and who will benefit from a centrally active agent. Based on loop gain theory, we hypothesized that OSA patients with higher central chemosensitivity have higher breathing instability following the use of a hypnosedative, temazepam. In 20 men with OSA in a double-blind, placebo-controlled cross-over trial we tested the polysomnographically (PSG) measured effects of temazepam 10 mg versus placebo on sleep apnoea. Treatment nights were at least 1�... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4960833 Mon, 13 Jun 2011 23:00:00 +0100 4960833 http://www.medworm.com/index.php?rid=4960832&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21672069%26dopt%3DAbstract Authors: Amir O, Barak-Shinar D, Henry A, Smart FW Sleep-disordered breathing and Cheyne-Stokes breathing are often not diagnosed, especially in cardiovascular patients. An automated system based on photoplethysmographic signals might provide a convenient screening and diagnostic solution for patient evaluation at home or in an ambulatory setting. We compared event detection and classification obtained by full polysomnography (the 'gold standard') and by an automated new algorithm system in 74 subjects. Each subject underwent overnight polysomnography, 60 in a hospital cardiology department and 14 while being tested for suspected sleep-disordered breathing in a sleep laboratory. The sleep-disordered breathing and Cheyne-Stokes breathing parameters measured by a new automated algorithm ... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4960832 Mon, 13 Jun 2011 23:00:00 +0100 4960832 http://www.medworm.com/index.php?rid=4960831&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21672070%26dopt%3DAbstract Authors: Novati A, Hulshof HJ, Granic I, Meerlo P It has been hypothesized that insufficient sleep may compromise neuronal function and contribute to neurodegenerative processes. While sleep loss by itself may not lead to cell death directly, it may affect the sensitivity to a subsequent neurodegenerative insult. Here we examined the effects of chronic sleep restriction (SR) on the vulnerability of the brain to N-methyl-d-aspartate (NMDA)-induced excitotoxicity. Animals were kept awake 20 h per day and were only allowed to rest during the first 4 h of the light phase, i.e. their normal circadian resting phase. After 30 days of SR all rats received a unilateral injection with a neurotoxic dose of NMDA into the nucleus basalis magnocellularis (NBM). Brains were collected for assess... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4960831 Mon, 13 Jun 2011 23:00:00 +0100 4960831 http://www.medworm.com/index.php?rid=4939690&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00931.x SummaryCentrally active agents have a variable impact in patients with obstructive sleep apnoea (OSA) that is unexplained. How to phenotype the individual OSA response is clinically important, as it may help to identify who will be at risk of respiratory depression and who will benefit from a centrally active agent. Based on loop gain theory, we hypothesized that OSA patients with higher central chemosensitivity have higher breathing instability following the use of a hypnosedative, temazepam. In 20 men with OSA in a double‐blind, placebo‐controlled cross‐over trial we tested the polysomnographically (PSG) measured effects of temazepam 10 mg versus placebo on sleep apnoea. Treatment nights were at least 1 week apart. Ventilatory chemoreflexes were also measured during wakefulness... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4939690 Mon, 13 Jun 2011 23:00:00 +0100 4939690 http://www.medworm.com/index.php?rid=4939689&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00932.x SummaryIt has been hypothesized that insufficient sleep may compromise neuronal function and contribute to neurodegenerative processes. While sleep loss by itself may not lead to cell death directly, it may affect the sensitivity to a subsequent neurodegenerative insult. Here we examined the effects of chronic sleep restriction (SR) on the vulnerability of the brain to N‐methyl‐d‐aspartate (NMDA)‐induced excitotoxicity. Animals were kept awake 20 h per day and were only allowed to rest during the first 4 h of the light phase, i.e. their normal circadian resting phase. After 30 days of SR all rats received a unilateral injection with a neurotoxic dose of NMDA into the nucleus basalis magnocellularis (NBM). Brains were collected for assessment of damage. In the intact non‐inj... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4939689 Mon, 13 Jun 2011 23:00:00 +0100 4939689 http://www.medworm.com/index.php?rid=4939688&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00927.x SummarySleep‐disordered breathing and Cheyne–Stokes breathing are often not diagnosed, especially in cardiovascular patients. An automated system based on photoplethysmographic signals might provide a convenient screening and diagnostic solution for patient evaluation at home or in an ambulatory setting. We compared event detection and classification obtained by full polysomnography (the ‘gold standard’) and by an automated new algorithm system in 74 subjects. Each subject underwent overnight polysomnography, 60 in a hospital cardiology department and 14 while being tested for suspected sleep‐disordered breathing in a sleep laboratory. The sleep‐disordered breathing and Cheyne–Stokes breathing parameters measured by a new automated algorithm system correlated very well with t... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4939688 Mon, 13 Jun 2011 23:00:00 +0100 4939688 http://www.medworm.com/index.php?rid=4960834&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21668552%26dopt%3DAbstract Authors: Baker FC, Turlington SR, Colrain I The sleep electroencephalogram (EEG) changes across adolescence; however, there are conflicting data as to whether EEG changes are regionally specific, are evident in non-rapid eye movement (NREM) and rapid eye movement (REM) sleep, and whether there are sex differences. The present study seeks to resolve some of these issues in a combined cross-sectional and longitudinal analysis of sleep EEG in adolescents. Thirty-three healthy adolescents (18 boys, 15 girls; 11-14 years) were studied on two occasions 6-8 months apart. Cross-sectional analysis of data from the initial visit revealed significantly less slow-wave sleep, delta (0.3 to <4 Hz) and theta (4 to <8 Hz) power in both NREM and REM sleep with advancing age. The age-delta... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4960834 Sun, 12 Jun 2011 23:00:00 +0100 4960834 http://www.medworm.com/index.php?rid=5031856&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00936.x In conclusion, the current study suggested that self‐reported snoring is associated significantly with carotid bifurcation intima‐media thickness and the presence of plaque, independent of traditional cardiovascular risk factors. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=5031856 Tue, 31 May 2011 23:00:00 +0100 5031856 http://www.medworm.com/index.php?rid=4971568&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00934.x This study was designed to examine perceptions of sleep quality in addition to actigraphy‐ and diary‐measured sleep variables in healthy girls at low and high familial risk for major depressive disorder. Forty‐four healthy daughters and their mothers completed a week of daily sleep diary and actigraphy; 24 girls had mothers with no history of psychopathology (low risk, mean age 14.92 years), and 20 girls had mothers with recurrent depression during the daughter’s lifetime (high risk, mean age 14.12 years). All daughters had no current or past psychopathology. High‐risk girls reported significantly poorer subjective sleep quality than did low‐risk girls (P = 0.001). The two groups of participants did not differ in actigraphy‐ or diary‐measured sleep duration, onset l... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4971568 Tue, 31 May 2011 23:00:00 +0100 4971568 http://www.medworm.com/index.php?rid=4939687&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00933.x SummaryThe month of birth has been proposed as a risk factor for narcolepsy, suggesting a harmful influence during early development. Several authors have described an excess of births in March in those developing narcolepsy later. Analysis methods in published studies varied, but no study corrected completely for possible changes in seasonal birth pattern over time in the appropriate population. The present study describes changes in seasonal birth pattern of the entire Dutch population over a 79‐year span and compared the monthly birth pattern of Dutch narcoleptics with the population data. Month and year of birth were noted for 307 patients with non‐familial narcolepsy with cataplexy, born in the Netherlands between 1923 and 2001. The numbers of live births per month and per year fr... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4939687 Tue, 31 May 2011 23:00:00 +0100 4939687 http://www.medworm.com/index.php?rid=4924568&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00930.x SummaryThe sleep electroencephalogram (EEG) changes across adolescence; however, there are conflicting data as to whether EEG changes are regionally specific, are evident in non‐rapid eye movement (NREM) and rapid eye movement (REM) sleep, and whether there are sex differences. The present study seeks to resolve some of these issues in a combined cross‐sectional and longitudinal analysis of sleep EEG in adolescents. Thirty‐three healthy adolescents (18 boys, 15 girls; 11–14 years) were studied on two occasions 6–8 months apart. Cross‐sectional analysis of data from the initial visit revealed significantly less slow‐wave sleep, delta (0.3 to <4 Hz) and theta (4 to <8 Hz) power in both NREM and REM sleep with advancing age. The age–delta power relationship was s... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4924568 Tue, 31 May 2011 23:00:00 +0100 4924568 http://www.medworm.com/index.php?rid=4879043&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00928.x SummaryTrazodone is prescribed widely as a sleep aid, although it is indicated for depression, not insomnia. Its daytime cognitive and psychomotor effects have not been investigated systematically in insomniacs. The primary goal of this study was to quantify, in primary insomniacs, the hypnotic efficacy of trazodone and subsequent daytime impairments. Sixteen primary insomniacs (mean age 44 years) participated, with insomnia confirmed by overnight polysomnography (sleep efficiency ≤ 85%). Trazodone 50 mg was administered to participants 30 min before bedtime for 7 days in a 3‐week, within‐subjects, randomized, double‐blind, placebo‐controlled design. Subjective effects, equilibrium (anterior/posterior body sway), short‐term memory, verbal learning, simulated driving... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4879043 Tue, 31 May 2011 14:02:40 +0100 4879043 http://www.medworm.com/index.php?rid=4866372&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00929.x In conclusion, our results showed that the symptoms associated with fibromyalgia contributed to poor overall sleep quality in patients compared with healthy subjects. The findings also suggest that the duration of symptoms, symptom severity and especially a sedentary lifestyle contributed to decreased sleep quality in patients with fibromyalgia. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4866372 Fri, 27 May 2011 14:05:44 +0100 4866372 http://www.medworm.com/index.php?rid=4844026&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00923.x SummaryThe aims of this study were to evaluate sensitivity, specificity and accuracy with an epoch‐by‐epoch comparison of polysomnography (PSG) and actigraphy with activity counts scored at low, medium and high thresholds, and to compare PSG‐derived total sleep time (TST), sleep efficiency (SE) and wake after sleep onset (WASO) to the same variables derived from actigraphy at low, medium and high thresholds in 9‐ to 11‐year‐old children with juvenile idiopathic arthritis (JIA), asthma and healthy control children. One night of PSG and actigraphy were recorded. Pairwise group comparisons for sensitivity showed significant differences at the low [Tukey’s honest significant difference (HSD) P < 0.002], medium (P < 0.001) and high thresholds (P < 0.001) betwe... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4844026 Fri, 20 May 2011 18:18:18 +0100 4844026 http://www.medworm.com/index.php?rid=4823219&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00924.x SummarySubjective alertness may provide some insight into reduced performance capacity under conditions suboptimal to neurobehavioural functioning, yet the accuracy of this insight remains unclear. We therefore investigated whether subjective alertness reflects the full extent of neurobehavioural impairment during the biological night when sleep is restricted. Twenty‐seven young healthy males were assigned to a standard forced desynchrony (FD) protocol (n = 13; 9.33 h in bed/28 h day) or a sleep‐restricted FD protocol (n = 14; 4.67 h in bed/28 h day). For both protocols, subjective alertness and neurobehavioural performance were measured using a visual analogue scale (VAS) and the psychomotor vigilance task (PVT), respectively; both measures were given at various combin... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4823219 Sat, 14 May 2011 23:37:00 +0100 4823219 http://www.medworm.com/index.php?rid=4807589&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00925.x This study examined the inherent variability of passive Pcrit measurement during sleep and evaluated the effects of sleep stage and body posture on Pcrit. Repeated measurements of Pcrit were assessed in 23 individuals (15 male) with diagnosed obstructive sleep apnoea throughout a single overnight sleep study. Body posture and sleep stage were unrestricted. Applied upper airway pressure was repetitively reduced to obtain multiple measurements of Pcrit. In 20 subjects multiple measurements of Pcrit were obtained. The overall coefficient of repeatability for Pcrit measurement was 4.1 cm H2O. Considering only the lateral posture, the coefficient was 4.8 cm H2O. It was 3.3 cm H2O in the supine posture. Pcrit decreased from the supine to lateral posture [supine mean 2.5 cm H2O, 95% confi... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4807589 Wed, 11 May 2011 19:11:02 +0100 4807589 http://www.medworm.com/index.php?rid=4807121&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21518063%26dopt%3DAbstract Authors: Dijk DJ PMID: 21518063 [PubMed - in process] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4807121 Wed, 11 May 2011 18:30:26 +0100 4807121 http://www.medworm.com/index.php?rid=4807120&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21518064%26dopt%3DAbstract Authors: Horne J, Moseley R This was a realistic military-type exercise assessing unexpected, abrupt early-morning awakening effects on immediate 'executive function' and the ability to comprehend and deal with a sudden emergency under a changing situation. Twenty (average age 21 years) healthy, highly motivated junior officer reservists were assigned randomly to two equal, independent groups, unforewarned as to what would happen. The experimental group was woken abruptly at 03 : 00 h (<3 h sleep) and confronted immediately with a 'paper exercise' of an enemy attack, requiring a feasible plan of engagement with minimal loss of resources, to be completed within 15 min. A control group slept until 07 : 30 h; they were then presented with the identical emergency 1 h... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4807120 Wed, 11 May 2011 18:30:22 +0100 4807120 http://www.medworm.com/index.php?rid=4807119&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21518065%26dopt%3DAbstract Authors: Giannotti F, Cortesi F, Cerquiglini A, Vagnoni C, Valente D The purpose of the present investigation was to characterize and compare traditional sleep architecture and non-rapid eye movement (NREM) sleep microstructure in a well-defined cohort of children with regressive and non-regressive autism, and in typically developing children (TD). We hypothesized that children with regressive autism would demonstrate a greater degree of sleep disruption either at a macrostructural or microstructural level and a more problematic sleep as reported by parents. Twenty-two children with non-regressive autism, 18 with regressive autism without comorbid pathologies and 12 with TD, aged 5-10 years, underwent standard overnight multi-channel polysomnographic evaluation. Parents completed a s... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4807119 Wed, 11 May 2011 18:30:18 +0100 4807119 http://www.medworm.com/index.php?rid=4807116&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21554464%26dopt%3DAbstract This study examined the inherent variability of passive Pcrit measurement during sleep and evaluated the effects of sleep stage and body posture on Pcrit. Repeated measurements of Pcrit were assessed in 23 individuals (15 male) with diagnosed obstructive sleep apnoea throughout a single overnight sleep study. Body posture and sleep stage were unrestricted. Applied upper airway pressure was repetitively reduced to obtain multiple measurements of Pcrit. In 20 subjects multiple measurements of Pcrit were obtained. The overall coefficient of repeatability for Pcrit measurement was 4.1 cm H(2) O. Considering only the lateral posture, the coefficient was 4.8 cm H(2) O. It was 3.3 cm H(2) O in the supine posture. Pcrit decreased from the supine to lateral posture [supine mean 2.5 cm H(2) ... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4807116 Sun, 08 May 2011 23:00:00 +0100 4807116 http://www.medworm.com/index.php?rid=4759943&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00921.x SummaryA question of great interest in current sleep research is whether and how sleep might facilitate complex cognitive skills such as decision‐making. The Iowa Gambling Task (IGT) was used to investigate effects of sleep on affect‐guided decision‐making. After a brief standardized preview of the IGT that was insufficient to learn its underlying rule, participants underwent a 12‐h delay containing either a normal night’s sleep (Sleep group; N = 28) or continuous daytime wake (Wake group; N = 26). Following the delay, both groups performed the full IGT. To control for circadian effects, two additional groups performed both the preview and the full task either in the morning (N = 17) or the evening (N = 21). In the IGT, four decks of cards were presented. Draws fr... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4759943 Thu, 28 Apr 2011 17:32:28 +0100 4759943 http://www.medworm.com/index.php?rid=4807117&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21535281%26dopt%3DAbstract Authors: Pace-Schott EF, Nave G, Morgan A, Spencer RM A question of great interest in current sleep research is whether and how sleep might facilitate complex cognitive skills such as decision-making. The Iowa Gambling Task (IGT) was used to investigate effects of sleep on affect-guided decision-making. After a brief standardized preview of the IGT that was insufficient to learn its underlying rule, participants underwent a 12-h delay containing either a normal night's sleep (Sleep group; N = 28) or continuous daytime wake (Wake group; N = 26). Following the delay, both groups performed the full IGT. To control for circadian effects, two additional groups performed both the preview and the full task either in the morning (N = 17) or the evening (N = 21). In the IGT, fou... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4807117 Tue, 26 Apr 2011 23:00:00 +0100 4807117 http://www.medworm.com/index.php?rid=4749574&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00920.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4749574 Tue, 26 Apr 2011 16:20:04 +0100 4749574 http://www.medworm.com/index.php?rid=4749573&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00922.x This study evaluated the knowledge of 170 parents of children aged 2–17 years about infant, child and adolescent sleep patterns and problems. The majority of parents could not answer correctly questions about developmental sleep patterns or sleep problems, but were more likely to answer correctly questions about normal infant sleep patterns and about sleep problems during waking hours. Parents also were more likely to answer ‘don’t know’ to questions about: (i) older children and adolescents; (ii) sleep apnea; and (iii) dreams and nightmares. The implications of these findings for the identification, intervention and prevention of childhood sleep problems are discussed. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4749573 Tue, 26 Apr 2011 16:19:51 +0100 4749573 http://www.medworm.com/index.php?rid=4807118&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21518066%26dopt%3DAbstract This study evaluated the knowledge of 170 parents of children aged 2-17 years about infant, child and adolescent sleep patterns and problems. The majority of parents could not answer correctly questions about developmental sleep patterns or sleep problems, but were more likely to answer correctly questions about normal infant sleep patterns and about sleep problems during waking hours. Parents also were more likely to answer 'don't know' to questions about: (i) older children and adolescents; (ii) sleep apnea; and (iii) dreams and nightmares. The implications of these findings for the identification, intervention and prevention of childhood sleep problems are discussed. PMID: 21518066 [PubMed - as supplied by publisher] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4807118 Mon, 25 Apr 2011 23:00:00 +0100 4807118 http://www.medworm.com/index.php?rid=4807122&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21489004%26dopt%3DAbstract Authors: Schmid MR, Loughran SP, Regel SJ, Murbach M, Bratic Grunauer A, Rusterholz T, Bersagliere A, Kuster N, Achermann P Previous studies have observed increases in electroencephalographic power during sleep in the spindle frequency range (approximately 11-15 Hz) after exposure to mobile phone-like radio frequency electromagnetic fields (RF EMF). Results also suggest that pulse modulation of the signal is crucial to induce these effects. Nevertheless, it remains unclear which specific elements of the field are responsible for the observed changes. We investigated whether pulse-modulation frequency components in the range of sleep spindles may be involved in mediating these effects. Thirty young healthy men were exposed, at weekly intervals, to three different conditions for 30 m... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4807122 Mon, 11 Apr 2011 23:00:00 +0100 4807122 http://www.medworm.com/index.php?rid=4807123&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21481053%26dopt%3DAbstract Authors: Ben-Hamou M, Marshall NS, Grunstein RR, Saini B, Fois RA A prominent media publicity cluster during 2007-2008 in Australia linked the common hypnotic zolpidem to adverse drug reaction reports of parasomnias, amnesia, hallucinations and suicidality. The collection of adverse drug reaction data through spontaneous reporting systems is a mainstay of drug safety monitoring, but a stimulated reporting event such as this often renders such data uninterpretable. As such, we aimed to investigate whether these associations were present before the media cluster and then to quantify the effect of stimulated reporting on those four specific outcomes. Using disproportionality analyses we compared zolpidem to all other drugs in the database, and then separately to each of all hypnotics, the... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4807123 Sun, 10 Apr 2011 23:00:00 +0100 4807123 http://www.medworm.com/index.php?rid=4702206&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21447050%26dopt%3DAbstract This study examined the use of actigraphy in the measurement of sleep of patients with depression and insomnia. Fifty-four patients diagnosed with a current major depressive episode and chronic insomnia underwent a baseline overnight study with concurrent actigraphic and polysomnography (PSG) monitoring, as well as subjective sleep diaries. Agreement between PSG, actigraphy and sleep diary measurements was evaluated using two-tailed t-tests, Pearson's correlations and the Bland-Altman concordance technique. The only significant difference found between actigraphy and PSG was in latency to persistent sleep, in which actigraphy underestimated sleep latency relative to PSG (P < 0.05). There were moderate positive correlations between actigraphy and PSG for all variables. In contrast, s... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4702206 Mon, 28 Mar 2011 23:00:00 +0100 4702206 http://www.medworm.com/index.php?rid=4643275&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21435064%26dopt%3DAbstract This study investigates to what extent these absolute differences in SWA can be explained with differences in grey matter volume, white matter volume or the thickness of skull and outer liquor rooms. To do this, we selected the 10-min interval showing maximal SWA of 20 young adult subjects and correlated these values lobe-wise with grey matter, skull and liquor thickness and globally with white matter as well as segments of the corpus callosum. Whereas grey matter, skull thickness and liquor did not correlate significantly with maximal slow wave activity, there were significant correlations with the anterior parts of the corpus callosum and with one other white matter region. In contrast, electroencephalogram power of higher frequencies correlates positively with grey matter volumes and co... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4643275 Fri, 25 Mar 2011 00:00:00 +0100 4643275 http://www.medworm.com/index.php?rid=4643276&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21410809%26dopt%3DAbstract Authors: Ammari M, Djeddi D, Léké A, Delanaud S, Stéphan-Blanchard E, Bach V, Telliez F The aim of the present study was to investigate the impact of gastro-oesophageal acid reflux on sleep in neonates and, reciprocally, the influence of wakefulness (W) and sleep stages on the characteristics of the reflux (including the retrograde bolus migration of oesophageal acid contents). The pH and multichannel intraluminal impedance were measured during nocturnal polysomnography in 25 infants hospitalised for suspicion of gastro-oesophageal reflux. Two groups were constituted according to whether or not the infants displayed gastro-oesophageal reflux (i.e. a reflux group and a control group). There were no differences between the reflux and control groups in terms of sleep duration, sleep st... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4643276 Thu, 17 Mar 2011 00:00:00 +0100 4643276 http://www.medworm.com/index.php?rid=4705994&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00918.x SummaryPrevious studies have observed increases in electroencephalographic power during sleep in the spindle frequency range (approximately 11–15 Hz) after exposure to mobile phone‐like radio frequency electromagnetic fields (RF EMF). Results also suggest that pulse modulation of the signal is crucial to induce these effects. Nevertheless, it remains unclear which specific elements of the field are responsible for the observed changes. We investigated whether pulse‐modulation frequency components in the range of sleep spindles may be involved in mediating these effects. Thirty young healthy men were exposed, at weekly intervals, to three different conditions for 30 min directly prior to an 8‐h sleep period. Exposure consisted of a 900‐MHz RF EMF, pulse modulated at 14 Hz or... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4705994 Tue, 01 Mar 2011 00:00:00 +0100 4705994 http://www.medworm.com/index.php?rid=4699555&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00919.x SummaryA prominent media publicity cluster during 2007–2008 in Australia linked the common hypnotic zolpidem to adverse drug reaction reports of parasomnias, amnesia, hallucinations and suicidality. The collection of adverse drug reaction data through spontaneous reporting systems is a mainstay of drug safety monitoring, but a stimulated reporting event such as this often renders such data uninterpretable. As such, we aimed to investigate whether these associations were present before the media cluster and then to quantify the effect of stimulated reporting on those four specific outcomes. Using disproportionality analyses we compared zolpidem to all other drugs in the database, and then separately to each of all hypnotics, then all benzodiazepines, and then temazepam alone, and did so i... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4699555 Tue, 01 Mar 2011 00:00:00 +0100 4699555 http://www.medworm.com/index.php?rid=4655000&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00917.x This study examined the use of actigraphy in the measurement of sleep of patients with depression and insomnia. Fifty‐four patients diagnosed with a current major depressive episode and chronic insomnia underwent a baseline overnight study with concurrent actigraphic and polysomnography (PSG) monitoring, as well as subjective sleep diaries. Agreement between PSG, actigraphy and sleep diary measurements was evaluated using two‐tailed t‐tests, Pearson’s correlations and the Bland–Altman concordance technique. The only significant difference found between actigraphy and PSG was in latency to persistent sleep, in which actigraphy underestimated sleep latency relative to PSG (P < 0.05). There were moderate positive correlations between actigraphy and PSG for all variables. In c... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4655000 Tue, 01 Mar 2011 00:00:00 +0100 4655000 http://www.medworm.com/index.php?rid=4633164&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00916.x This study investigates to what extent these absolute differences in SWA can be explained with differences in grey matter volume, white matter volume or the thickness of skull and outer liquor rooms. To do this, we selected the 10‐min interval showing maximal SWA of 20 young adult subjects and correlated these values lobe‐wise with grey matter, skull and liquor thickness and globally with white matter as well as segments of the corpus callosum. Whereas grey matter, skull thickness and liquor did not correlate significantly with maximal slow wave activity, there were significant correlations with the anterior parts of the corpus callosum and with one other white matter region. In contrast, electroencephalogram power of higher frequencies correlates positively with grey matter volumes an... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4633164 Tue, 01 Mar 2011 00:00:00 +0100 4633164 http://www.medworm.com/index.php?rid=4602354&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00915.x SummaryThe aim of the present study was to investigate the impact of gastro‐oesophageal acid reflux on sleep in neonates and, reciprocally, the influence of wakefulness (W) and sleep stages on the characteristics of the reflux (including the retrograde bolus migration of oesophageal acid contents). The pH and multichannel intraluminal impedance were measured during nocturnal polysomnography in 25 infants hospitalised for suspicion of gastro‐oesophageal reflux. Two groups were constituted according to whether or not the infants displayed gastro‐oesophageal reflux (i.e. a reflux group and a control group). There were no differences between the reflux and control groups in terms of sleep duration, sleep structure and sleep state change frequency. Vigilance states significantly influence... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4602354 Tue, 01 Mar 2011 00:00:00 +0100 4602354 http://www.medworm.com/index.php?rid=4527568&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21320222%26dopt%3DAbstract Authors: Maquet P PMID: 21320222 [PubMed - in process] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4527568 Mon, 28 Feb 2011 11:41:21 +0100 4527568 http://www.medworm.com/index.php?rid=4514226&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00914.x SummaryIt has been hypothesized that non‐rapid eye movement (NREM) sleep facilitates declarative memory consolidation, and rapid eye movement (REM) sleep is particularly important in promoting procedural learning. The aim of this study was to examine the effects of pharmacological REM sleep suppression on performance in different neuropsychological tasks. For our baseline, we chose 41 moderately depressed patients (age range 19–44 years), who were not taking antidepressants. In the morning after polysomnography, we tested memory recall and cognitive flexibility by assessment of verbal and figural fluency, a shift of attention task and the Trail Making Test B. After recording baseline values, patients were assigned randomly to one of three treatment groups: medication with citalopram;... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4514226 Thu, 24 Feb 2011 18:36:52 +0100 4514226 http://www.medworm.com/index.php?rid=4485411&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2010.00861.x In conclusion, the BQ classified one out of four middle‐aged Norwegians to be at high‐risk of having OSA, but the screening properties of the BQ were suboptimal. The estimated prevalence of OSA was comparable to previous estimates from general populations in the USA, Australia and Europe. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4485411 Thu, 17 Feb 2011 18:37:19 +0100 4485411 http://www.medworm.com/index.php?rid=4485410&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00909.x (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4485410 Thu, 17 Feb 2011 18:37:16 +0100 4485410 http://www.medworm.com/index.php?rid=4485409&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00913.x This study indicates that the use of computers and mobile telephones in the bedroom are related to poor sleep habits, but that media use in the bedroom seems to be unrelated to symptoms of insomnia. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4485409 Thu, 17 Feb 2011 18:36:56 +0100 4485409 http://www.medworm.com/index.php?rid=4472884&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21306460%26dopt%3DAbstract Authors: Dijk DJ PMID: 21306460 [PubMed - in process] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4472884 Mon, 14 Feb 2011 07:45:07 +0100 4472884 http://www.medworm.com/index.php?rid=4472885&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21303422%26dopt%3DAbstract Authors: Harada Y, Oga T, Chin K, Takegami M, Takahashi KI, Sumi K, Nakamura T, Nakayama-Ashida Y, Minami I, Horita S, Oka Y, Wakamura T, Fukuhara S, Mishima M, Kadotani H Obstructive sleep apnoea (OSA) plays a significant role in increasing blood pressure. Significant decreases were reported in blood pressure of hypertensive OSA patients with sleepiness who underwent continuous positive airway pressure (CPAP) treatment, but not in non-sleepy hypertensive OSA patients. More recently, however, significant decreases in blood pressure in non-sleepy hypertensive OSA patients following CPAP were shown. Effects of sleepiness on hypertension in OSA patients have been investigated, but not the effects of hypertension on sleepiness in OSA patients. We investigated the relationships between hype... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4472885 Wed, 09 Feb 2011 00:00:00 +0100 4472885 http://www.medworm.com/index.php?rid=4452022&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00912.x SummaryObstructive sleep apnoea (OSA) plays a significant role in increasing blood pressure. Significant decreases were reported in blood pressure of hypertensive OSA patients with sleepiness who underwent continuous positive airway pressure (CPAP) treatment, but not in non‐sleepy hypertensive OSA patients. More recently, however, significant decreases in blood pressure in non‐sleepy hypertensive OSA patients following CPAP were shown. Effects of sleepiness on hypertension in OSA patients have been investigated, but not the effects of hypertension on sleepiness in OSA patients. We investigated the relationships between hypertension and sleepiness in patients with OSA. We analysed data on 275 middle‐aged male subjects from a cross‐sectional epidemiological health survey. We measured... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4452022 Wed, 09 Feb 2011 00:00:00 +0100 4452022 http://www.medworm.com/index.php?rid=4472886&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21294800%26dopt%3DAbstract This study suggests that long work hours coupled with poor sleep characteristics are synergistically associated with increased risk of workplace injury. Greater attention should be paid to manage/treat poor sleep and reduce excessive work hours to improve safety at the workplace. PMID: 21294800 [PubMed - as supplied by publisher] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4472886 Mon, 07 Feb 2011 00:00:00 +0100 4472886 http://www.medworm.com/index.php?rid=4443101&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00910.x This study suggests that long work hours coupled with poor sleep characteristics are synergistically associated with increased risk of workplace injury. Greater attention should be paid to manage/treat poor sleep and reduce excessive work hours to improve safety at the workplace. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4443101 Mon, 07 Feb 2011 00:00:00 +0100 4443101 http://www.medworm.com/index.php?rid=4472887&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21281369%26dopt%3DAbstract Authors: Langheim FJ, Murphy M, Riedner BA, Tononi G Sleep is a behavioral state ideal for studying functional connectivity because it minimizes many sources of between-subject variability that confound waking analyses. This is particularly important for potential connectivity studies in mental illness where cognitive ability, internal milieu and active psychotic symptoms can vary widely across subjects. We, therefore, sought to adapt techniques applied to magnetoencephalography for use in high-density electroencephalography (EEG), the gold-standard in brain-recording methods during sleep. Autoregressive integrative moving average modeling was used to reduce spurious correlations between recording sites (electrodes) in order to identify functional networks. We hypothesized that identif... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4472887 Tue, 01 Feb 2011 00:00:00 +0100 4472887 http://www.medworm.com/index.php?rid=4420667&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00911.x SummarySleep is a behavioral state ideal for studying functional connectivity because it minimizes many sources of between‐subject variability that confound waking analyses. This is particularly important for potential connectivity studies in mental illness where cognitive ability, internal milieu and active psychotic symptoms can vary widely across subjects. We, therefore, sought to adapt techniques applied to magnetoencephalography for use in high‐density electroencephalography (EEG), the gold‐standard in brain‐recording methods during sleep. Autoregressive integrative moving average modeling was used to reduce spurious correlations between recording sites (electrodes) in order to identify functional networks. We hypothesized that identified network characteristics would be simil... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4420667 Tue, 01 Feb 2011 00:00:00 +0100 4420667 http://www.medworm.com/index.php?rid=4406295&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21261767%26dopt%3DAbstract Authors: Frauscher B, Gschliesser V, Brandauer E, Schönwald SV, Falkenstetter T, Ehrmann L, Tokmak I, Poewe W, Högl B Motor events during sleep can be frequently observed in patients with narcolepsy-cataplexy. We hypothesized that increased motor events and related arousals contribute to sleep fragmentation in this disease. We aimed to perform a detailed whole-night video-polysomnographic analysis of all motor events during non-rapid eye movement and rapid eye movement sleep in a group of narcolepsy-cataplexy patients and matched controls, and to assess the association with arousals. Video-polysomnographic registrations of six narcolepsy-cataplexy patients and six sex- and age-matched controls were analysed. Each motor event in the video was classified according to topography, number... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4406295 Tue, 25 Jan 2011 00:00:00 +0100 4406295 http://www.medworm.com/index.php?rid=4395824&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00906.x SummaryMotor events during sleep can be frequently observed in patients with narcolepsy–cataplexy. We hypothesized that increased motor events and related arousals contribute to sleep fragmentation in this disease. We aimed to perform a detailed whole‐night video‐polysomnographic analysis of all motor events during non‐rapid eye movement and rapid eye movement sleep in a group of narcolepsy–cataplexy patients and matched controls, and to assess the association with arousals. Video‐polysomnographic registrations of six narcolepsy–cataplexy patients and six sex‐ and age‐matched controls were analysed. Each motor event in the video was classified according to topography, number of involved body parts, duration and its association with arousals. The mean motor activity index ... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4395824 Tue, 25 Jan 2011 00:00:00 +0100 4395824 http://www.medworm.com/index.php?rid=4406296&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21244540%26dopt%3DAbstract This study examined a two-dimensional approach to assessing affective states among good and poor sleepers using the self-assessment manikin (SAM), a brief non-verbal self-report measure of affective states with separate ratings of valence and arousal. A sample of 286 undergraduate students completed the Pittsburgh Sleep Quality Index (PSQI) and the SAM. Participants were classified post hoc as either good (PSQI ≤ 5) or poor sleepers (PSQI > 5) using the PSQI and used the SAM to rate their current affective states (day) and their affective state at bedtime (night) the previous night. Compared to good sleepers, poor sleepers reported more negative affect and arousal at night and more negative affect during the day. Among poor sleepers, lower sleep quality and shorter sleep durat... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4406296 Wed, 19 Jan 2011 00:00:00 +0100 4406296 http://www.medworm.com/index.php?rid=4364421&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2011.00907.x This study examined a two‐dimensional approach to assessing affective states among good and poor sleepers using the self‐assessment manikin (SAM), a brief non‐verbal self‐report measure of affective states with separate ratings of valence and arousal. A sample of 286 undergraduate students completed the Pittsburgh Sleep Quality Index (PSQI) and the SAM. Participants were classified post hoc as either good (PSQI ≤ 5) or poor sleepers (PSQI > 5) using the PSQI and used the SAM to rate their current affective states (day) and their affective state at bedtime (night) the previous night. Compared to good sleepers, poor sleepers reported more negative affect and arousal at night and more negative affect during the day. Among poor sleepers, lower sleep quality and shorter sle... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4364421 Wed, 19 Jan 2011 00:00:00 +0100 4364421 http://www.medworm.com/index.php?rid=4406297&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21226780%26dopt%3DAbstract In conclusion, a maximum of two continuous nocturnal driving hours should be recommended. PMID: 21226780 [PubMed - as supplied by publisher] (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4406297 Wed, 12 Jan 2011 00:00:00 +0100 4406297 http://www.medworm.com/index.php?rid=4339643&cid=s_32223_25_f&fid=32223&url=http%3A%2F%2Fdx.doi.org%2F10.1111%252Fj.1365-2869.2010.00901.x In conclusion, a maximum of two continuous nocturnal driving hours should be recommended. (Source: Journal of Sleep Research) Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4339643 Wed, 12 Jan 2011 00:00:00 +0100 4339643 http://www.medworm.com/index.php?rid=4340206&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21205038%26dopt%3DAbstract Authors: Sánchez-Ortuño MM, Edinger JD, Wyatt JK The type and severity of daytime symptoms reported by insomnia sufferers may vary markedly. Whether distinctive daytime symptom profiles are related to different insomnia diagnoses has not been studied previously. Using profile analysis via multidimensional scaling, we investigated the concurrent validity of ICSD-2 insomnia diagnoses by analysing the relationship of prototypical profiles of daytime symptoms with a subset of ICSD-2 diagnoses, such as insomnia associated to a mental disorder, psychophisiological insomnia, paradoxical insomnia, inadequate sleep hygiene, idiopathic insomnia, obstructive sleep apnea and restless legs syndrome. In a sample of 332 individuals meeting research diagnostic criteria for insomnia (221 women, M(age... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4340206 Tue, 04 Jan 2011 00:00:00 +0100 4340206 http://www.medworm.com/index.php?rid=4340208&cid=s_32223_146_f&fid=36338&url=http%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fentrez%2Fquery.fcgi%3Ftmpl%3DNoSidebarfile%26db%3DPubMed%26cmd%3DRetrieve%26list_uids%3D21199038%26dopt%3DAbstract Authors: DE Sousa G, Schlüter B, Menke T, Trowitzsch E, Andler W, Reinehr T The aim of this study was to compare polysomnographic variables of obese adolescents with polycystic ovarian syndrome (PCOS) to those of healthy controls and to analyse whether polysomnographic variables correlate to parameters of body weight/body composition, to serum androgens and to parameters of glucose metabolism. Thirty-one obese adolescents with PCOS (15.0 years ± 1.0, body mass index 32.7 kg per m(2)  ± 6.2) and 19 healthy obese adolescents without PCOS (15.2 years ± 1.1, body mass index 32.4 kg per m(2)  ± 4.0) underwent polysomnography to compare apnoea index, hypopnoea index, apnoea-hypopnoea index, the absolute number of obstructive apnoeas, percentage sleep Stages 1, 2,... Journal of Sleep Research journals http://www.medworm.com/rss/comments.php?id=4340208 Wed, 29 Dec 2010 00:00:00 +0100 4340208