Journal of Electromyography and Kinesiology Journal of Electromyography and Kinesiology RSS feedThis 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.

Toward the validation of a new method (MUNIX) for motor unit number assessment
This prospectively designed study analyzed the correlation of a new, non-invasive neurophysiological method (Motor Unit Number Index - MUNIX) with two established Motor Unit Number Estimation (MUNE) methods. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - February 20, 2016 Category: Neurology Authors: Franziska Stein, Ines Kobor, Ulrich Bogdahn, Wilhelm J. Schulte-Mattler Source Type: research

Fatigue- and training-related changes in ‘beta’ intermuscular interactions between agonist muscles
The synchronous activation of the muscles involved in force production is crucial for the neuromuscular performance, but the underlying mechanisms remain to be fully elucidated. Our aim was thus to contribute to understand the mechanisms involved in the synergistic activation of agonist muscles. Through wavelet-based time–frequency analysis, this study investigated the modulation of ‘beta’ intermuscular interactions (IM) during maximum isometric knee extensions performed before and after repetitive submaximal fatiguing contractions. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - February 20, 2016 Category: Neurology Authors: Camille Charissou, Laurent Vigouroux, Eric Berton, David Amarantini Source Type: research

Effect of seat positions on discomfort, muscle activation, pressure distribution and pedal force during cycling
The aim of this study was to measure and analyse discomfort and biomechanics of cycling, i.e., muscle activation, centre of pressure of seat pressure profiles and pedal forces as a function of seat position. Twenty-one recreationally active individuals cycled for 10 minutes at 100 W on an ergometer cycle using five different seat positions. The neutral position was considered as basic seat position and was compared with upward, downward, forward and backward seat positions. The initial bout was repeated at the end of the recording session. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - February 17, 2016 Category: Neurology Authors: Rachita Verma, Ernst A Hansen, Mark de Zee, Pascal Madeleine Source Type: research

The impact of high-heeled shoes on ankle complex during walking in young women—In vivo kinematic study based on 3D to 2D registration technique
To explore the accurate in vivo kinematic changes in the ankle complex when wearing low- and high-heel shoes (LHS and HHS, respectively). (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - February 16, 2016 Category: Neurology Authors: Chen Wang, Xiang Geng, Shaobai Wang, Xin Ma, Xu Wang, Jiazhang Huang, Chao Zhang, Li Chen, Junsheng Yang, Jiabei Li, Kan Wang Source Type: research

The impact of state of bladder fullness on tonic and phasic activation of the pelvic floor muscles in women
We aimed to determine if state of bladder fullness affects pelvic floor muscle activation in healthy women without urogenital symptoms. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - February 13, 2016 Category: Neurology Authors: Linda McLean, Catherine Normandeau, Joanne Hodder Source Type: research

Effect of kinesthetic illusion induced by visual stimulation on muscular output function after short-term immobilization
Kinesthetic illusions by visual stimulation (KiNVIS) enhances corticomotor excitability and activates motor association areas. The purpose of this study was to investigate the effect of KiNVIS induction on muscular output function after short-term immobilization. Thirty subjects were assigned to 3 groups: an immobilization group, with the left hand immobilized for 12 h (immobilization period); an illusion group, with the left hand immobilized and additionally subjected to KiNVIS of the immobilized part during the immobilization period; and a control group with no manipulation. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - February 12, 2016 Category: Neurology Authors: Toru Inada, Fuminari Kaneko, Tatsuya Hayami Source Type: research

The use of intermittent trunk flexion to alleviate low back pain during prolonged standing
The current study examined of the effect of intermittent, short-term periods of full trunk flexion on the development of low back pain (LBP) during two hours of standing. Sixteen participants completed two 2-hour standing protocols, separated by one week. On one day, participants stood statically for 2 hours (control day); on the other day participants bent forward to full spine flexion (termed flexion trials) to elicit the flexion relaxation (FR) phenomenon for 5 seconds every 15 minutes (experimental day). (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - February 9, 2016 Category: Neurology Authors: Danielle M. Stewart, Diane E. Gregory Source Type: research

History Dependence of the Electromyogram: Implications for Isometric Steady-State EMG Parameters Following a Lengthening or Shortening Contraction
Residual force enhancement (RFE) and force depression (FD) refer to an increased or decreased force following an active lengthening or shortening contraction, respectively, relative to the isometric force produced at the same activation level and muscle length. Our intent was to determine if EMG characteristics differed in the RFE or FD states compared with a purely isometric reference contraction for maximal and submaximal voluntary activation of the adductor pollicis muscle. Quantifying these alterations to EMG in history-dependent states allows for more accurate modeling approaches for movement control in the future. (S...
Source: Journal of Electromyography and Kinesiology - February 5, 2016 Category: Neurology Authors: Alexis A. Jones, Geoffrey A. Power, Walter Herzog Source Type: research

Concordance of the location of the innervation zone of the tibialis anterior muscle using voluntary and imposed contractions by electrostimulation
The innervation zone (IZ) corresponds to the location of the neuromuscular junctions. Its location can be determined by using arranged surface linear electrode arrays. Typically, voluntary muscle contractions (VC) are used in this method. However, it also may be necessary to locate the IZ under clinical conditions such as spasticity, in which this type of contraction is difficult to perform. Therefore, contractions imposed by electrostimulation (ES) can be an alternative. There is little background comparing the locations of IZ obtained by two different types of contractions. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - January 29, 2016 Category: Neurology Authors: R.A. Guzmán-Venegas, M.P. Bralic, J.J. Cordero, G. Cavada, O.F. Araneda Source Type: research

Scapular muscle activity in a variety of plyometric exercises
Plyometric shoulder exercises are commonly used to progress from slow analytical strength training to more demanding high speed power training in the return to play phase after shoulder injury. The aim of this study was first, to investigate scapular muscle activity in plyometric exercises to support exercise selection in practice and second, to enhance understanding of how scapular muscles are recruited during the back and forth movement phase of these exercises. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - January 28, 2016 Category: Neurology Authors: Maenhout Annelies, Benzoor Maya, Werin Mia, Cools Ann Source Type: research

Neuromuscular response amplitude to mechanical stimulation using large-array surface electromyography in participants with and without chronic low back pain
The present study aimed to compare the neuromuscular response under various mechanical stimulations of the lumbar spine in participants with and without chronic low back pain (cLBP). (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - January 28, 2016 Category: Neurology Authors: Isabelle Pagé, François Nougarou, Martin Descarreaux Source Type: research

iEMG: Imaging Electromyography
Advanced data analysis and visualization methodologies have played an important role in making surface electromyography both a valuable diagnostic methodology of neuromuscular disorders and a robust brain-machine interface, usable as a simple interface for prosthesis control, arm movement analysis, stiffness control, gait analysis, etc. But for diagnostic purposes, as well as for interfaces where the activation of single muscles is of interest, surface EMG suffers from severe crosstalk between deep and superficial muscle activation, making the reliable detection of the source of the signal, as well as reliable quantificati...
Source: Journal of Electromyography and Kinesiology - January 27, 2016 Category: Neurology Authors: Holger Urbanek, van Patrick der Smagt Source Type: research

Neck and shoulder muscle activity and posture among helicopter pilots and crew-members during military helicopter flight
This study quantified the physical workload on neck and shoulder muscles using electromyography (EMG) measures during helicopter flight. Nine standardized sorties were performed, encompassing: cruising from location A to location B (AB) and performing search and rescue (SAR). SAR was performed with night vision goggles (NVG), while AB was performed with (AB+NVG) and without NVG (AB-NVG). EMG was recorded for: trapezius (TRA), upper neck extensors (UNE), and sternocleido-mastoid (SCM). (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - January 20, 2016 Category: Neurology Authors: Mike Murray, Britt Lange, Shadi Samir Chreiteh, Henrik Baare Olsen, Bo Riebeling Nørnberg, Eleanor Boyle, Karen Søgaard, Gisela Sjøgaard Source Type: research

Flexion–relaxation ratio in computer workers with and without chronic neck pain
This study evaluated the flexion–relaxation phenomenon (FRP) and flexion–relaxation ratios (FR-ratios) using surface electromyography (sEMG) of the cervical extensor muscles of computer workers with and without chronic neck pain, as well as of healthy subjects who were not computer users. This study comprised 60 subjects 20–45years of age, of which 20 were computer workers with chronic neck pain (CPG), 20 were computer workers without neck pain (NPG), and 20 were control individuals who do not use computers for work and use them less than 4h/day for other purposes (CG). (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - January 6, 2016 Category: Neurology Authors: Carina Ferreira Pinheiro, Marina Foresti dos Santos, Thais Cristina Chaves Source Type: research

Methods for assessment of trunk stabilization, a systematic review
Trunk stabilization is achieved differently in patients with low back pain compared to healthy controls. Many methods exist to assess trunk stabilization but not all measure the contributions of intrinsic stiffness and reflexes simultaneously. This may pose a threat to the quality/validity of the study and might lead to misinterpretation of the results. The aim of this study was to provide a critical review of previously published methods for studying trunk stabilization in relation to low back pain (LBP). (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - January 6, 2016 Category: Neurology Authors: E. Maaswinkel, M. Griffioen, R.S.G.M. Perez, J.H. van Dieën Tags: Review Source Type: research