Journal of Electromyography and Kinesiology This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Standards for Reporting EMG Data
(Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - June 22, 2017 Category: Neurology Source Type: research

Standing on wedges modifies side-specific postural control in the presence of lateral external perturbations
The objective of the study was to investigate the role of wedges and external lateral perturbations on anticipatory (APA) and compensatory postural adjustments (CPA). Ten healthy young participants were exposed to perturbations applied to the lateral part of their right shoulder when standing on a planar surface, on a medial or lateral wedge. Bilateral electromyographic activity of dorsal and ventral postural muscles and the center of pressure (COP) displacement were recorded and analyzed during the APA and CPA phases. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - June 19, 2017 Category: Neurology Authors: Yun-Ju Lee, Jing-Nong Liang, Bing Chen, Mohan Ganesan, Alexander S. Aruin Source Type: research

Estimation of distal arm joint angles from EMG and shoulder orientation for transhumeral prostheses
In this paper, we quantify the extent to which shoulder orientation, upper-arm electromyography (EMG), and forearm EMG are predictors of distal arm joint angles during reaching in eight subjects without disability as well as three subjects with a unilateral transhumeral amputation and targeted reinnervation. Prior studies have shown that shoulder orientation and upper-arm EMG, taken separately, are predictors of both elbow flexion/extension and forearm pronation/supination. We show that, for eight subjects without disability, shoulder orientation and upper-arm EMG together are a significantly better predictor of both elbow...
Source: Journal of Electromyography and Kinesiology - June 11, 2017 Category: Neurology Authors: Aadeel Akhtar, Navid Aghasadeghi, Levi Hargrove, Timothy Bretl Source Type: research

Relation between Peak Power Output in Sprint Cycling and Maximum Voluntary Isometric Torque Production
From a cycling paradigm, little has been done to understand the relationships between maximal isometric strength of different single joint lower body muscle groups and their relation with, and ability to predict PPO and how they compare to an isometric cycling specific task. The aim of this study was to establish relationships between maximal voluntary torque production from isometric single-joint and cycling specific tasks and assess their ability to predict PPO. Twenty male trained cyclists participated in this study. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - June 10, 2017 Category: Neurology Authors: Mehdi Kordi, Stuart Goodall, Paul Barratt, Nicola Rowley, Jonathan Leeder, Glyn Howatson Source Type: research

An EMG-assisted modeling approach to assess passive lumbar tissue loading in-vivo during trunk bending
Lower back pain (LBP) is a condition with high prevalence and high cost both in the United States and around the world. The magnitude of mechanical loading on spine is strongly associated with the occurrence of LBP. Previously, to assess spinal loading, biologically assisted biomechanical models were developed to estimate trunk muscle contraction forces. Loadings on lumbar passive tissues are estimated using anatomical models. However, despite the substantial individual variability in lumbar ligament geometry and viscoelastic properties, the existing anatomical models do not account for these differences. (Source: Journal ...
Source: Journal of Electromyography and Kinesiology - June 10, 2017 Category: Neurology Authors: Xiaopeng Ning Source Type: research

Maximum Voluntary Isometric Torque Production for Task specific and Single-joint Muscle groups and their Relation to Peak Power Output in Sprint Cycling
From a cycling paradigm, little has been done to understand the relationships between maximal isometric strength of different single joint lower body muscle groups and their relation with, and ability to predict PPO and how they compare to an isometric cycling specific task. The aim of this study was to establish relationships between maximal voluntary torque production from isometric single-joint and cycling specific tasks and assess their ability to predict PPO. Twenty male trained cyclists participated in this study. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - June 10, 2017 Category: Neurology Authors: Mehdi Kordi, Stuart Goodall, Paul Barratt, Jonathan Leeder, Nicola Rowley, Glyn Howatson Source Type: research

Electromyographic analysis of rotator cuff muscles in patients with rotator cuff tendinopathy: a systematic review
This study reviewed the evidence of studies comparing the electromyographic (EMG) activity of any RC muscle of shoulders with a symptomatic RCTe to asymptomatic shoulders. Eight databases were searched. Data from 343 participants (201 symptomatic and 209 asymptomatic shoulders) were analyzed from 10 out of 402 included studies. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - June 9, 2017 Category: Neurology Authors: F ábio Carlos Lucas de Oliveira, Laurent Julien Bouyer, Amanda Ager, Jean-Sébastien Roy Source Type: research

Comparison of Techniques to Determine Human Skeletal Muscle Voluntary Activation
Determining volitional activation (VA) can provide insights on the cause of muscle weakness in orthopedic and neurological populations. Two electrical stimulation techniques are traditionally used to quantify VA: interpolation (IT) and superimposition (CAR). IT allows for a more accurate VA estimation, however it requires individuals to be stimulated twice, compared to once for CAR, and thus increases stimulation associated discomfort. To date, there is no agreement on what is the best practical technique for calculating quadriceps VA. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - June 8, 2017 Category: Neurology Authors: Anastasia Zarkou, Scott Stackhouse, Stuart A. Binder-Macleod, Samuel C.K. Lee Source Type: research

Indirect sinusoidal vibrations induces an acute increase in explosive strength
The purpose of this study was to examine the acute effect of indirect vibration on neuromuscular responses and fatigue resistance (electromyographic activity - EMG and force) during isometric exercise. Nineteen healthy men (age = 22.4 ± 2.7 years; body mass = 76.4 ± 12.9 kg, height = 175 ± 6.7 cm) performed isometric elbow flexion exercises in three experimental treatments: only isometric exercise (control - CON); isometric exercise with the addition of sinusoidal vibrations (SVE1; frequency = 20 Hz, displacement = 3.55 ± 0.5 4 mm); and isometric exercise with the addition of sinusoidal vibrations with frequency variat...
Source: Journal of Electromyography and Kinesiology - June 6, 2017 Category: Neurology Authors: Leandro V. de Paula, Pedro V.S. Moreira, Rudolf Huebner, Leszek A. Szmuchorwski Source Type: research

Gait analysis of young male patients diagnosed with primary bladder neck obstruction
Primary bladder neck obstruction (PBNO) represents an inappropriate or inadequate relaxation of the bladder neck during micturition. Based on the observation of an increased rate of postural imbalances in male patients with PBNO, we hypothesized a possible role of an unbalanced biomechanics of the pelvis on urethral sphincters activity. Our aim was to identify kinematic imbalances, usually disregarded in PBNO patients, and which could eventually be involved in the etiopathogenesis of the disease. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - June 2, 2017 Category: Neurology Authors: Matteo Zago, Tommaso Ciro Camerota, Stefano Pisu, Daniela Ciprandi, Chiarella Sforza Source Type: research

Angle of gaze and optic flow direction modulate body sway
Optic flow is a crucial signal in maintaining postural stability. We sought to investigate whether the activity of postural muscles and body sway was modulated by eye position during the view of radial optic flow stimuli. We manipulated the spatial distribution of dot speed and the fixation point position to simulate specific heading directions combined with different gaze positions. The experiments were performed using stabilometry and surface electromyography (EMG) on 24 right-handed young, healthy volunteers. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - May 31, 2017 Category: Neurology Authors: Milena Raffi, Alessandro Piras, Michela Persiani, Monica Perazzolo, Salvatore Squatrito Source Type: research

Effects of Amplitude and Predictability of Perturbations to the Arm on Anticipatory and Reactionary Muscle Responses to Maintain Balance
In this study we applied fast ramp perturbations to the hand in anterior, posterior, medial and lateral directions. The effects of perturbation predictability and amplitude on the postural response of upper limb, trunk and lower limb muscles were investigated. Perturbations were applied either in blocks of constant amplitude and direction (predictable) or with direction and amplitude varying randomly (random) from trial to trial. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - May 30, 2017 Category: Neurology Authors: Ali Forghani, Richard Preuss, Theodore Edgar Milner Source Type: research

Rotator cuff tendinopathy alters the muscle activity onset and kinematics of scapula
This study aimed to determine whether alteration in scapular kinematics is associated with deficits in the activity onset of scapular muscles. Forty-three male volleyball players (17 asymptomatic and 26 with RC tendinopathy) joined the study. Three-dimensional scapular kinematics was quantified using an acromial marker cluster method. The activity onset of the upper (UT), middle (MT), and lower trapezius (LT), and serratus anterior (SA) during arm abduction was assessed with electromyography. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - May 30, 2017 Category: Neurology Authors: Hio Teng Leong, Gabriel Yin-fat Ng, Shing Chung Chan, Siu Ngor Fu Source Type: research

Ankle and knee biomechanics during normal walking following ankle plantarflexor fatigue
The purpose of this study was to investigate the immediate effects of unilateral ankle plantarflexor fatigue on bilateral knee and ankle biomechanics during gait. Lower leg kinematics, kinetics, and muscle activation were assessed before and after an ankle plantarflexor fatiguing protocol in 31 healthy individuals. Fatigue (defined as> 10% reduction in maximal isometric ankle plantarflexor torque production and a downward shift in the median power frequency of both heads of the gastrocnemius muscle of the fatigued limb) was achieved in 18 individuals, and only their data were used for analysis purposes. (Source: Journal of...
Source: Journal of Electromyography and Kinesiology - May 30, 2017 Category: Neurology Authors: Michael A. Hunt, Gillian L. Hatfield Source Type: research

A new method for the localization of the innervation zone based on monopolar surface-detected potentials
In monopolar electrode configuration, the shape of the motor unit potential (MUP) undergoes essential morphologic changes with increasing distance from the innervation zone. In particular, the rising phase of the MUP slows down and becomes longer as the electrode is moved further from the innervation zone. Based on this, it is hypothesized that the maximum slope of the rising phase of a monopolar MUP (SlopeMAX) would reach its highest value at the innervation zone. Herein, we sought to determine whether the location of the innervation zone coincides with the position in the muscle of the monopolar MUP with highest SlopeMAX...
Source: Journal of Electromyography and Kinesiology - May 24, 2017 Category: Neurology Authors: Javier Rodriguez-Falces Source Type: research