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.

Comparison of methods for estimating motor unit firing rate time series from firing times
The central nervous system regulates recruitment and firing of motor units to modulate muscle tension. Estimation of the firing rate time series is typically performed by decomposing the electromyogram (EMG) into its constituent firing times, then lowpass filtering a constituent train of impulses. Little research has examined the performance of different estimation methods, particularly in the inevitable presence of decomposition errors. The study of electrocardiogram (ECG) and electroneurogram (ENG) firing rate time series presents a similar problem, and has applied novel simulation models and firing rate estimators. (Sou...
Source: Journal of Electromyography and Kinesiology - August 31, 2016 Category: Neurology Authors: Lukai Liu, Paolo Bonato, Edward A. Clancy Source Type: research

Comparison of methods for estimating motor unit firing rate times series from firing times
The central nervous system regulates recruitment and firing of motor units to modulate muscle tension. Estimation of the firing rate time series is typically performed by decomposing the electromyogram (EMG) into its constituent firing times, then lowpass filtering a constituent train of impulses. Little research has examined the performance of different estimation methods, particularly in the inevitable presence of decomposition errors. The study of electrocardiogram (ECG) and electroneurogram (ENG) firing rate time series presents a similar problem, and has applied novel simulation models and firing rate estimators. (Sou...
Source: Journal of Electromyography and Kinesiology - August 31, 2016 Category: Neurology Authors: Lukai Liu, Paolo Bonato, Edward A. Clancy Source Type: research

Inter-individual variability and pattern recognition of surface electromyography in front crawl swimming
Variability of electromyographic (EMG) recordings is a complex phenomenon rarely examined in swimming. Our purposes were to investigate inter-individual variability in muscle activation patterns during frontcrawl swimming and assess if there were clusters of sub patterns present. Bilateral muscle activity of rectus abdominis (RA) and deltoideus medialis (DM) was recorded using wireless surface EMG in 15 adult male competitive swimmers. The amplitude of the median EMG trial of six upper arm movement cycles was used for the inter-individual variability assessment, quantified with the coefficient of variation, coefficient of ...
Source: Journal of Electromyography and Kinesiology - August 31, 2016 Category: Neurology Authors: Jonas Martens, Daniel Daly, Kevin Deschamps, Filip Staes, Ricardo J. Fernandes Source Type: research

Torque-Onset Determination: Unintended Consequences of the Threshold Method
Compared with visual torque-onset-detection (TOD), threshold-based TOD produce onset bias, which increases with lower torques or rates of torque development (RTD). (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - August 31, 2016 Category: Neurology Authors: Raffy Dotan, Glenn Jenkins, Thomas D. O ’Brien, Steve Hansen, Bareket Falk Source Type: research

The Relationship between Sensory Latency and Amplitude
To prove that the relationship between sensory latencies and amplitudes is useful in determining the severity of neuropathies. This is achieved by deriving a mathematical relationship between sensory distal latency and amplitude. Determine whether sensory amplitudes below predicted correlate with a worse pathology. Procedures: Patients seen for Nerve Conduction Studies by the Department of Physical Medicine and Rehabilitation at Cooper University Hospital between 12/1/12 and 12/31/14 were invited to participate in a prospective database. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - August 27, 2016 Category: Neurology Authors: Elliot B. Bodofsky, Stephen J. Cohen, Rohini J. Kumar, Adam Schindelheim, John Gaughan Source Type: research

Altered EMG patterns in diabetic neuropathic and not neuropathic patients during step ascending and descending
This study aims at investigating the presence of functional alterations in diabetic subjects during stair climbing and at exploring the relationship between altered muscle activation and temporal parameter. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - August 20, 2016 Category: Neurology Authors: Fabiola Spolaor, Zimi Sawacha, Gabriella Guarneri, Silvia Del Din, Angelo Avogaro, Claudio Cobelli Source Type: research

Muscle fiber conduction velocity in different gait phases of early and late-stage diabetic neuropathy
We investigated the muscle fiber conduction velocity (MFCV) during gait phases of the lower limb muscles in individuals with various degrees of diabetic peripheral neuropathy (DPN). Forty-five patients were classified into severity degrees of DPN by a fuzzy model. The stages were absent (n=11), mild (n=14), moderate (n=11) and severe (n=9), with 10 matched healthy controls. While walking, all subjects had their sEMG (4 linear electrode arrays) recorded for tibialis anterior (TA), gastrocnemius medialis (GM), vastus lateralis (VL) and biceps femoris (BF). (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - August 17, 2016 Category: Neurology Authors: Eneida Yuri Suda, Aline A. Gomes, Marco Kenji Butugan, Isabel C.N. Sacco Source Type: research

A validation study of a new instrument for low cost bite force measurement
Quantitative assessment of force in masticatory muscles is not a routine clinical test, probably due to the lack of an "easy-to-use" device. Aim of this study is 1) to present a low cost bite force instrument located in a custom-made housing, designed to guarantee a comfortable and effective bite action, 2) to evaluate its mechanical characteristics, in order to implement it in clinical settings and in experimental setups.Linearity, repeatability and adaptation over time were assessed on a set of four different sensors in bare and housed condition. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - August 10, 2016 Category: Neurology Authors: Marco Testa, Anna Di Marco, Raffaele Pertusio, Peter Van Roy, Erik Cattrysse, Silvestro Roatta Source Type: research

Normalizing surface electromyographic measures of the masticatory muscles: Comparison of two different methods for clinical purpose
To compare a new normalization technique (wax pad, WAX) with the currently utilized cotton roll (COT) method in surface electromyography (sEMG) of the masticatory muscles. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - August 9, 2016 Category: Neurology Authors: Andrea Mapelli, Gianluca Martino Tartaglia, Stephen Thaddeus Connelly, Virgilio Ferruccio Ferrario, Claudia Maria De Felicio, Chiarella Sforza Source Type: research

Upper limb and trunk muscle activation during an unexpected descent on the outstretched hands in young and older women
Falling on the outstretched hands (FOOSH), a protective mechanism to arrest the body and avoid injury, requires upper limb and trunk motor control for effective body descent. The purpose of this study was to investigate muscle activity during three phases of an unexpected FOOSH in healthy older and younger women. Twenty young (mean age 22.9 yrs., SD ±3.7) and 20 older females (mean age 68.1yrs., SD ±5.0) performed five trials of unexpected FOOSHs. Surface electromyography (EMG) determined muscle activations for left shoulder girdle, elbow and abdominal muscles during an unexpected FOOSH. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - August 7, 2016 Category: Neurology Authors: Lauren J. Lattimer, Joel L. Lanovaz, Jonathan P. Farthing, St éphanie Madill, Soo Kim, Cathy Arnold Source Type: research

Detecting fatigue thresholds from electromyographic signals: A systematic review on approaches and methodologies
The aim of the current paper was to systematically review the relevant existing electromyographic threshold concepts within the literature. The electronic databases MEDLINE and SCOPUS were screened for papers published between January 1980 and April 2015 including the keywords: neuromuscular fatigue threshold, anaerobic threshold, electromyographic threshold, muscular fatigue, aerobic-anaerobictransition, ventilatory threshold, exercise testing, and cycle-ergometer. 32 articles were assessed with regard to their electromyographic methodologies, description of results, statistical analysis and test protocols. (Source: Journ...
Source: Journal of Electromyography and Kinesiology - August 4, 2016 Category: Neurology Authors: Ertl Peter, Kruse Annika, Tilp Markus Tags: Review Source Type: research

Influence of timing variability between motor unit potentials on M-wave characteristics
The transient enlargement of the compound muscle action potential (M wave) after a conditioning contraction is referred to as potentiation. It has been recently shown that the potentiation of the first and second phases of a monopolar M wave differed drastically; namely, the first phase remained largely unchanged, whereas the second phase underwent a marked enlargement and shortening. This dissimilar potentiation of the first and second phases has been suggested to be attributed to a transient increase in conduction velocity after the contraction. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - August 4, 2016 Category: Neurology Authors: Javier Rodriguez-Falces, Armando Malanda, Iban Latasa, Ana Lavilla-Oiz, Javier Navallas Source Type: research

Influence of Locomotion Speed on Biomechanical Subtask and Muscle Synergy
This paper investigates the relationship of biomechanical subtasks, and muscle synergies with various locomotion speeds. Ground reaction force (GRF) of eight healthy subjects is measured synchronously by force plates of treadmill at five different speeds ranging from 0.5m/s to 1.5m/s. Four basic biomechanical subtasks, body support, propulsion, swing, and heel strike preparation, are identified according to GRF. Meanwhile, electromyography (EMG) data, used to extract muscle synergies, are collected from lower limb muscles. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - August 1, 2016 Category: Neurology Authors: Kai Gui, Dingguo Zhang Source Type: research

Tendon reflex is suppressed during whole-body vibration
In this study we have investigated the effect of whole body vibration (WBV) on the tendon reflex (T-reflex) amplitude. Fifteen young adult healthy volunteer males were included in this study. Records of surface EMG of the right soleus muscle and accelerometer taped onto the right Achilles tendon were obtained while participant stood upright with the knees in extension, on the vibration platform. Tendon reflex was elicited before and during WBV. Subjects completed a set of WBV. Each WBV set consisted of six vibration sessions using different frequencies (25, 30, 35, 40, 45, 50 Hz) applied randomly. (Source: Journal of Elect...
Source: Journal of Electromyography and Kinesiology - July 22, 2016 Category: Neurology Authors: Ilhan Karacan, Muharrem Cidem, Gizem Yilmaz, Oguz Sebik, Halil Ibrahim Cakar, Kemal S ıtkı Türker Source Type: research

Effects of active pause pattern of surface electromyographic activity among subjects performing monotonous tasks: A systematic review
Active pauses have shown potentially beneficial effects to increase the variability of the electrical activation pattern of muscles. However, there is a lack of consensus as to how to design and implement those pauses and the processing methods of surface electromyography (EMG) data when evaluating low-level monotonous tasks. The aim of this systematic review was to synthesize the evidences regarding the way which active pauses have been applied, and the methods used to investigate the related EMG changes. (Source: Journal of Electromyography and Kinesiology)
Source: Journal of Electromyography and Kinesiology - July 22, 2016 Category: Neurology Authors: Leticia Bergamin Januario, Roberta de F átima Carreira Moreira, Marina Machado Cid, Afshin Samani, Pascal Madeleine, Ana Beatriz Oliveira Source Type: research