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.

Kinematic Analysis of Swallowing in the Patients with Esophagectomy for Esophageal Cancer
The aim of this study is to reveal the mechanism of esophagectomy-mediated swallowing motion disorders. Forty-seven patients who underwent 3-stage esophagectomy with cervical anastomosis and VFSS for esophageal cancer were selected. Twenty-three patients displayed subglottic aspiration (aspiration group) and the other 24 patients did not show any aspiration or penetration in the videofluoroscopic swallowing study after esophagectomy (no aspiration group). For comparison, 27 healthy volunteers (normal group) were included. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - November 30, 2015 Category: Neurology Authors: Sang Jun Kim, Hee Jung Cheon, Han Nah Lee, Ji Hye Hwang Source Type: research

Standards for Reporting EMG Data
(Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - November 21, 2015 Category: Neurology Source Type: research

A Novel Approach for Removing ECG Interferences from Surface EMG signals Using a Combined ANFIS and Wavelet
In recent years, the removal of electrocardiogram (ECG) interferences from electromyogram (EMG) signals has been given large consideration. Where the quality of EMG signal is of interest, it is important to remove ECG interferences from EMG signals. In this paper, an efficient method based on a combination of adaptive neuro-fuzzy inference system (ANFIS) and wavelet transform is proposed to effectively eliminate ECG interferences from surface EMG signals. The proposed approach is compared with other common methods such as high-pass filter, artificial neural network, adaptive noise canceller, wavelet transform, subtraction ...
Source: Journal of Electromyography and Kinesiology - November 17, 2015 Category: Neurology Authors: Sara Abbaspour, Ali Fallah, Maria Linden, Hamid Gholamhosseini Source Type: research

An investigation on the simultaneously recorded occlusion contact and surface electromyographic activity for patients with unilateral temporomandibular disorders pain
The present study examined if unilateral pain from temporomandibular disorders (TMD) was associated with the occlusion contacts and surface electromyographic (SEMG) activities of jaw-closing muscles. Eleven patients with unilateral TMD pain and 20 healthy volunteers who all had Angle’s Class-I occlusions were enrolled. The numbers and load distributions of the occlusion contacts and the SEMG activities of the anterior temporalis (TA) muscles and masseters muscles (MM) during maximal voluntary clenching (MVC) in the centric and eccentric positions were simultaneously recorded on both sides. (Source: Journal of Electromyog...
Source: Journal of Electromyography and Kinesiology - November 16, 2015 Category: Neurology Authors: Bao-Yong Li, Li-Juan Zhou, Shao-xiong Guo, Yuan Zhang, Lei Lu, Mei-Qing Wang Source Type: research

From the incoming Editor in Chief
For the past 25 years, Prof. Solomonow has been the Editor in Chief of the Journal of Electromyography and Kinesiology (JEK). Under his direction, the Journal has become a reference means of dissemination for motor control scientists who use electromyography to study muscles and movement. In this period, the Journal has published a number of breakthrough papers in the field and has proposed recommendations for standard quality in EMG recordings and use which had a broad dissemination. As new Editor in Chief, I am sincerely grateful to Prof. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - November 16, 2015 Category: Neurology Authors: Dario Farina Source Type: research

Delayed onset of electromyographic activity of the vastus medialis relative to the vastus lateralis may be related to physical activity levels in females with patellofemoral pain
The aims of this study were to examine group differences in muscle activation onset of the vastus medialis (VM) in relation to the vastus lateralis (VL) and pain level during stair ascent in females with patellofemoral pain (PFP) who maintain high and moderate levels of physical activity; to determine the association between physical activity level and muscle activation onset. Forty-three females with PFP and thirty-eight pain-free females were recruited and divided into four groups based on their level of physical activity: females with PFP(n=26) and pain-free females(n=26) who practiced a moderate level of physical activ...
Source: Journal of Electromyography and Kinesiology - November 12, 2015 Category: Neurology Authors: Ronaldo Valdir Briani, Danilo de Oliveira Silva, Marcella Ferraz Pazzinatto, Amanda Schenatto Ferreira, Deisi Ferrari, Fábio Mícolis de Azevedo Source Type: research

Motor unit number estimation as a complementary test to routine electromyography in the diagnosis of amyotrophic lateral sclerosis
Electromyographic (EMG) abnormalities that reveal denervation and reinnervation caused by lower motor neuron degeneration do not reflect the number of motor units that determines muscle strength. Consequently, motor unit activity potential (MUAP) parameters do not reflect muscle dysfunction.The aim of the study was to compare the value of motor unit number estimation (MUNE) and MUAP parameters as indicators of clinical muscle dysfunction in patients with amyotrophic lateral sclerosis (ALS), and to analyze the role of MUNE as a supplement to the EMG criteria for the diagnosis of ALS. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - November 11, 2015 Category: Neurology Authors: Malgorzata Gawel, Ewa Zalewska, Lipowska Marta, Kostera-Pruszczyk Anna, Elzbieta Szmidt-Salkowska, Kaminska Anna Source Type: research

Muscular forearm activation in hand-grip tasks with superimposition of mechanical vibrations
The purpose of this paper is to evaluate the muscular activation of the forearm, with or without vibration stimuli at different frequencies while performing a grip tasks of 45 seconds at various level of exerted force. In 16 individuals, 9 females and 7 males, the surface electromyogram (EMG) of extensor carpi radialis longus and the flexor carpi ulnari muscles were assessed. At a short latency from onset EMG, RMS and the level of MU Synchronization were assessed to evaluate the muscular adaptations. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - November 5, 2015 Category: Neurology Authors: L. Fattorini, A. Tirabasso, A. Lunghi, R. Di Giovanni, F. Sacco, E. Marchetti Source Type: research

Evaluating Protocols For Normalizing Forearm Electromyograms During Power Grip
Many studies use a reference task of an isometric maximum voluntary power grip task in a mid-pronated forearm posture to normalize their forearm electromyographic (EMG) signal amplitude. Currently there are no recommended protocols to do this. In order to provide guidance on the topic, we examined the EMG amplitude of six forearm muscles (three flexors and three extensors) during twenty different maximal voluntary efforts that included various gripping postures, force and moment exertions and compared them to a frequently used normalization task of exerting a maximum grip force, termed the reference task. (Source: Journal ...
Source: Journal of Electromyography and Kinesiology - November 4, 2015 Category: Neurology Authors: Binh P.T. Ngo, Richard P. Wells Source Type: research

Measuring Voluntary Quadriceps Activation: Effect of Visual Feedback and Stimulus Delivery
Quadriceps voluntary activation, assessed via the superimposed burst technique, has been extensively studied in a variety of populations as a measure of quadriceps function. However, a variety of stimulus delivery techniques have been employed, which may influence the level of voluntary activation as calculated via the central activation ratio (CAR). The purpose was to determine the effect of visual feedback, stimulus delivery, and perceived discomfort on maximal voluntary isometric contraction (MVIC) peak torque and the CAR. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - November 2, 2015 Category: Neurology Authors: Brittney A. Luc, Matthew H. Harkey, Gabrielle D. Arguelles, J. Troy Blackburn, Eric D. Ryan, Brian Pietrosimone Source Type: research

Strength training, but not endurance training, reduces motor unit discharge rate variability
This study evaluates and compares the effects of strength and endurance training on motor unit discharge rate variability and force steadiness of knee extensor muscles. Thirty sedentary healthy men (age, 26.0 ± 3.8 yrs) were randomly assigned to strength training, endurance training or a control group. Conventional endurance and strength training was performed 3 days per week, over a period of 6 weeks. Maximum voluntary contraction (MVC), time to task failure (at 30% MVC), coefficient of variation (CoV) of force and of the discharges rates of motor units from the vastus medialis obliquus and vastus lateralis were determin...
Source: Journal of Electromyography and Kinesiology - October 31, 2015 Category: Neurology Authors: Carolina Vila-Chã, Deborah Falla Source Type: research

Factors to consider in identifying critical points in lumbar spine flexion relaxation
Flexion relaxation (FR), a myoelectric silence of extensor muscles near end range of lumbar flexion, is commonly reported as the lumbar flexion angle at the instant the extensor muscles become silent. However, lumbar flexion angle alone is insufficient to characterize mechanisms that modulate FR. As FR requires the moment generated by passive lumbar extensor tissues to equilibrate the moment due to gravity, the inter-relationships between lumbar moment, flexion angle, and myoelectrical silence will provide added information in the understanding of FR. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - October 31, 2015 Category: Neurology Authors: Derek P. Zwambag, Stephen H.M. Brown Source Type: research

Comparison of sEMG processing methods during whole-body vibration exercise
The objective was to investigate the influence of surface electromyography (sEMG) processing methods on the quantification of muscle activity during whole-body vibration (WBV) exercises. sEMG activity was recorded while the participants squatted performed squats on the platform with and without WBV. The spikes observed in the sEMG spectrum at the vibration frequency and its harmonics were deleted using state-of-the-art methods, i.e. (1) a band-stop filter, (2) a band-pass filter, and (3) spectral linear interpolation. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - October 29, 2015 Category: Neurology Authors: Karin Lienhard, Aline Cabasson, Olivier Meste, Serge S. Colson Source Type: research

Electromyographic Assessment of Forearm Muscle Function in Tennis Players With and Without Lateral Epicondylitis
There is no consensus about the main aetiology of Lateral Epicondylitis (LE) or Tennis Elbow. While electromyographic assessment of alterations in neuromuscular control and activation patterns of forearm muscles has received increasing interest as potential intrinsic factors in non-tennis players, there has been insufficient attention in tennis players. The purpose of present review was to search the literature for the electromyographic studies of forearm muscles in tennis players in order to 1) identify related implications for LE, 2) highlight key technical and methodological shortcomings, and 3) suggest potential pathwa...
Source: Journal of Electromyography and Kinesiology - October 28, 2015 Category: Neurology Authors: Omid Alizadehkhaiyat, Simon P Frostick Tags: Review Source Type: research

Obesity is Associated with Prolonged Activity of the Quadriceps and Gastrocnemii during Gait
To examine the effect of obesity and its potential interaction with knee OA presence on the electromyography patterns of the major knee joint periarticular muscles during walking. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - October 27, 2015 Category: Neurology Authors: P. Amiri, C.L. Hubley-Kozey, S.C. Landry, W.D. Stanish, J.L. Astephen Wilson Source Type: research