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.

Intra-abdominal pressure interacts with a low-back belt to effect abdominal muscle thickness and activity
It has been shown that under isometric conditions, as the activity of the abdominal muscles increases, the thicknesses of the muscles also increase. The purpose of this experiment was to determine whether change in muscle thickness could be used as a measure of muscle activity during a deadlift as well as determining the effect of a weightlifting belt and/or the Valsalva maneuver on the muscle thicknesses. The Transversus Abdominis (TrA) and Internal Obliques (IO) muscles were analyzed at rest and during a deadlift. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - April 7, 2016 Category: Neurology Authors: Trevor W. Blanchard, Camille Smith, Sylvain G. Grenier Source Type: research

Use of a Backpack Alters Gait Initiation of High School Students
We assessed how backpack carriage influences the gait initiation (GI) process in high school students, who extensively use backpacks. GI involves different dynamics from gait itself, while the excessive use of backpacks can result in adverse effects. 117 high school students were evaluated in three experimental conditions: no backpack (NB), bilateral backpack, and unilateral backpack (UB). Two force plates were used to acquire ground reaction forces (GRFs) and moments for each foot separately. Center of pressure (COP) scalar variables were extracted, and statistical parametric mapping analysis was performed over the entire...
Source: Journal of Electromyography and Kinesiology - April 7, 2016 Category: Neurology Authors: Marcus Fraga Vieira, Georgia Cristina Lehnen, Matias Noll, Fábio Barbosa Rodrigues, Ivan Silveira de Avelar, Paula Hentschel Lobo da Costa Source Type: research

Surface electromyography activity of the rectus abdominis, internal oblique, and external oblique muscles during forced expiration in healthy adults
We aimed to characterize rectus abdominis, internal oblique, and external oblique muscle activity in healthy adults under expiratory resistance using surface electromyography. We randomly assigned 42 healthy adult subjects to 3 groups: 30%, 20%, and 10% maximal expiratory intraoral pressure (PEmax). After measuring 100% PEmax and muscle activity during 100% PEmax, the activity and maximum voluntary contraction of each muscle during the assigned experimental condition were measured. At 100% PEmax, the external oblique (p < 0.01) and internal oblique (p < 0.01) showed significantly elevated activity compared with the rectus ...
Source: Journal of Electromyography and Kinesiology - April 3, 2016 Category: Neurology Authors: Kenichi Ito, Koji Nonaka, Shinya Ogaya, Atsushi Oogi, Chiaki Matsunaka, Jun Horie Source Type: research

The role of biceps brachii and brachioradialis for the control of elbow flexion and extension movements
How do synergistic muscles interact, when their contraction aims at stabilizing and fine- tuning a movement, which is induced by the antagonistic muscle? The aim of the study was to analyze the interaction of biceps and brachioradialis during fine- tuning control tasks in comparison to load bearing ones. The surface electromyogram of biceps, brachioradialis and triceps were examined in 15 healthy subjects in dynamic flexion and extension movements with different combinations of contraction levels, joint angles and angular velocities. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - April 1, 2016 Category: Neurology Authors: Sylvie Charlotte Frieda Anneliese von Werder, Catherine Disselhorst-Klug Source Type: research

Towards reducing the impacts of unwanted movements on identification of motion intentions
Surface electromyogram (sEMG) has been extensively used as a control signal in prosthesis devices. However, it is still a great challenge to make multifunctional myoelectric prostheses clinically available due to a number of critical issues associated with existing EMG based control strategy. One such issue would be the effect of unwanted movements (UMs) that are inadvertently done by users on the performance of movement classification in EMG pattern recognition based algorithms. Since UMs are not considered in training a classifier, they would decay the performance of a trained classifier in identifying the target movemen...
Source: Journal of Electromyography and Kinesiology - March 30, 2016 Category: Neurology Authors: Xiangxin Li, Shixiong Chen, Haoshi Zhang, Oluwarotimi Williams Samuel, Hui Wang, Peng Fang, Xiufeng Zhang, Guanglin Li Source Type: research

Cortical motor representation of the rectus femoris does not differ between the left and right hemisphere
Transcranial magnetic stimulation (TMS) involves non-invasive magnetic stimulation of the brain, and can be used to explore the corticomotor excitability and motor representations of skeletal muscles. However there is a lack of motor mapping studies in the lower limb and few conducted in healthy cohorts. The cortical motor representations of muscles can vary between individuals in terms of center position and area despite having a general localized region within the motor cortex. It is important to characterize the normal range for these variables in healthy cohorts to be able to evaluate changes in clinical populations. (...
Source: Journal of Electromyography and Kinesiology - March 14, 2016 Category: Neurology Authors: Sarah Ward, Adam L. Bryant, Brian Pietrosimone, Kim L. Bennell, Ross Clark, Alan J. Pearce Source Type: research

Effects of slip severity on muscle activation of the trailing leg during an unexpected slip
In this study, muscle activation patterns, specifically those of the trailing (non-slipping) limb, were studied in unexpected slips of 24 young and 24 middle-aged adults. The typical reaction at the trailing limb is swing phase interruption in an attempt to arrest the slip. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - March 9, 2016 Category: Neurology Authors: C. O’Connell, A. Chambers, A. Mahboobin, R. Cham Source Type: research

Enhancement of Motor Coordination by Applying High Frequency Repetitive TMS on the Sensory Cortex
The sensory function plays an important role for successful motor performance. We investigated the modulating effects of high frequency repetitive transcranial magnetic stimulation (rTMS) on sensory discrimination and motor coordination. Twenty healthy participants were assigned into two random groups; the real- and sham-rTMS group. Total of 900 rTMS pulses at a frequency of 10 Hz (stimulus intensity of 90% RMT) were given over deltoid representational areas of the somatosensory cortex. Sensory discrimination ability was evaluated using two-point discrimination test. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - March 9, 2016 Category: Neurology Authors: Eun-Hi Choi, Woo-Kyoung Yoo, Suk Hoon Ohn, SeungHo Ahn, Han Jun Kim, Kwang-Ik Jung Source Type: research

Validity of the Twitch Interpolation Technique for the Assessment of Quadriceps Neuromuscular Asymmetries
This study examined the validity of the twitch interpolation technique for evaluating side-to-side asymmetries in quadriceps neuromuscular function. Fifty-six subjects with a wide range of asymmetries (19 healthy, 24 with unilateral and 13 with bilateral anterior cruciate ligament reconstruction) took part in the study. Supramaximal electrical paired stimuli were delivered to the quadriceps muscle during and immediately after a maximal voluntary contraction (MVC) of the knee extensors (twitch interpolation technique). (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - March 9, 2016 Category: Neurology Authors: Nicola Angelo Maffiuletti, Marco Barbero, Corrado Cescon, Ron Clijsen, Matteo Beretta-Piccoli, Alessandro Schneebeli, Stefan Preiss, Danilo Togninalli Source Type: research

Neuromuscular Response of Hip-Spanning and Low Back Muscles to Medio-Lateral Foot Center of Pressure Manipulation during Gait
The objective of this study was to investigate effects of medio-lateral foot center of pressure manipulation on muscle activity of hip-spanning and back muscles during gait in bilateral hip osteoarthritis patients. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - March 9, 2016 Category: Neurology Authors: Deborah Solomonow-Avnon, Daniel Levin, Michal Elboim-Gabyzon, Nimrod Rozen, Eli Peled, Alon Wolf Source Type: research

Surface electromyography analysis of blepharoptosis correction by transconjunctival incisions
This study examines the possibility of using the assessments of temporal correlation in surface electromyography (SEMG) as a quantitative description for the change of muscle controlling after operation. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - March 8, 2016 Category: Neurology Authors: Lung-Chen Tu, Ming-Chya Wu, Hsueh-Liang Chu, Yi-Pin Chiang, Chih-Lin Kuo, Hsing-Yuan Li, Chia-Ching Chang Source Type: research

Cycle time influences the development of muscle fatigue at low to moderate levels of intermittent muscle contraction
Localized muscle fatigue (LMF) during a repetitive task can be influenced by several aspects such as the level and duration of exertions. Among these aspects, though, the influence of cycle time remains unclear. Here, the effect of cycle time on LMF and performance was examined for a simple biomechanical system during repetitive static efforts. Participants performed 1-hour trials of intermittent isometric index finger abduction with a duty cycle of 50% in all combinations of two cycle times (30 and 60 sec) and two exertion levels (15 and 25% of maximum voluntary capacity). (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - March 7, 2016 Category: Neurology Authors: Ehsan Rashedi, Maury A. Nussbaum Source Type: research

Can surface electromyography improve surgery planning? Electromyographic assessment and intraoperative verification of the nerve bundle entry point location of the gracilis muscle
To verify the precision of surface electromyography (sEMG) in locating the innervation zone of the gracilis muscle, by comparing the location of the IZ estimated by means of sEMG with in vivo location of the nerve bundle entry point in patients before graciloplasty procedure due to fecal incontinence. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - February 28, 2016 Category: Neurology Authors: Michal Romaniszyn, Piotr Walega, Michal Nowakowski, Wojciech Nowak Source Type: research

Influence of chronic low back pain and fear of movement on the activation of the transversely oriented abdominal muscles during forward bending
Chronic low back pain (CLBP) and fear of movement (kinesiophobia) are associated with an overactivation of paravertebral muscles during forward bending. This impairs spine motor control and contributes to pain perpetuation. However, the abdominal muscles activation is engaged too in spine stabilization but its modulation with kinesiophobia remains unknown. Our study tested whether CLBP and kinesiophobia affected the activation pattern of abdominal muscles during trunk flexion/extension. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - February 22, 2016 Category: Neurology Authors: Hugo Massé-Alarie, Louis-David Beaulieu, Richard Preuss, Cyril Schneider Source Type: research

The Effects of Upper Limb Posture and a Sub-Maximal Gripping Task on Corticospinal Excitability to Muscles of the Forearm
Variations in handgrip force influences shoulder muscle activity, and this effect is dependent upon upper limb position. Previous work suggests that neural coupling between proximal and distal muscles with changes in joint position is a possible mechanism but these studies tend to use artificially constrained postures that do not reflect activities of daily living. The purpose of this study was to examine the effects of upper limb posture on corticospinal excitability to the forearm muscles during workplace relevant arm positions. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - February 22, 2016 Category: Neurology Authors: Davis A. Forman, Julianne Baarbe, Julian Daligadu, Bernadette Murphy, Michael W.R. Holmes Source Type: research