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Gulsah Kinali, Ferda Dokuztuğ Üçsular
[Purpose] This study aimed to establish a scientific and clinical basis for the development of a method for the early diagnosis of cumulative trauma disorders experienced by mothers of disabled children. [Subjects and Methods] Ten volunteer mothers who came to a rehabilitation centre for the treatment of their children were included in this study. Surface electromyography measurements were taken during maximum isometric contraction through the extensor muscle motor point of the wrist of the mothers, and hand grip strength was measured...
February 2018: Journal of Physical Therapy Science
Linda Resnik, He Helen Huang, Anna Winslow, Dustin L Crouch, Fan Zhang, Nancy Wolk
BACKGROUND: Although electromyogram (EMG) pattern recognition (PR) for multifunctional upper limb prosthesis control has been reported for decades, the clinical benefits have rarely been examined. The study purposes were to: 1) compare self-report and performance outcomes of a transradial amputee immediately after training and one week after training of direct myoelectric control and EMG pattern recognition (PR) for a two-degree-of-freedom (DOF) prosthesis, and 2) examine the change in outcomes one week after pattern recognition training and the rate of skill acquisition in two subjects with transradial amputations...
March 15, 2018: Journal of Neuroengineering and Rehabilitation
H M M T B Herath, S P Pahalagamage, Sunethra Senanayake
BACKGROUND: The pathogenesis of osmotic demyelination syndrome is not completely understood and usually occurs with severe and prolonged hyponatremia, particularly with rapid correction. It can occur even in normonatremic patients, especially who have risk factors like alcoholism, malnutrition and liver disease. Bilateral tongue fasciculations with denervation pattern in electromyogram is a manifestation of damage to the hypoglossal nucleus or hypoglossal nerves. Tongue fasciculations were reported rarely in some cases of osmotic demyelination syndrome, but the exact mechanism is not explained...
March 14, 2018: BMC Research Notes
Alexander Neergaard Olesen, Matteo Cesari, Julie Anja Engelhard Christensen, Helge Bjarup Dissing Sorensen, Emmanuel Mignot, Poul Jennum
OBJECTIVE: To evaluate rapid eye movement (REM) muscular activity in narcolepsy by applying five algorithms to electromyogram (EMG) recordings, and to investigate its value for narcolepsy diagnosis. PATIENTS/METHODS: A modified version of phasic EMG metric (mPEM), muscle activity index (MAI), REM atonia index (RAI), supra-threshold REM EMG activity metric (STREAM), and Frandsen method (FR) were calculated from polysomnography recordings of 20 healthy controls, 18 clinic controls (subjects suspected with narcolepsy but finally diagnosed without any sleep abnormality), 16 narcolepsy type one without REM sleep behavior disorder (RBD), nine narcolepsy type one with RBD, and 18 narcolepsy type two...
April 2018: Sleep Medicine
Emma B Garrison, Jonathan Dropkin, Rebecca Russell, Paul Jenkins
Agricultural workers perform tasks that frequently require awkward and extreme postures that are associated with musculoskeletal disorders (MSDs). The PATH (Posture, Activity, Tools, Handling) system currently provides a sound methodology for quantifying workers' exposure to these awkward postures on an ordinal scale of measurement, which places restrictions on the choice of analytic methods. This study reports a modification of the PATH methodology that instead captures these postures as degrees of flexion, an interval-scaled measurement...
January 29, 2018: Journal of Agricultural Safety and Health
Thomas Zambelis, Pinelopi Koutsoudaki, Evangelos Anagnostou, Panagiotis Kokotis, Nikolaos Karandreas
PURPOSE: The aim of our study was the comparison of active denervation (fibrillation and/or positive sharp wave potentials) in thoracic paraspinal muscles with rectus abdominis in patients with definite amyotrophic lateral sclerosis. METHODS: Ninety-five consecutive patients with clinically definite amyotrophic lateral sclerosis according to the revised El Escorial criteria were studied prospectively over a 5-year period. Concentric needle electromyogram was performed in thoracic paraspinal muscles, in the rectus abdominis at the T9 level, and in limb muscles...
March 6, 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
Naoki Wada, Takahiro Shimizu, Nobutaka Shimizu, William C de Groat, Anthony J Kanai, Pradeep Tyagi, Hidehiro Kakizaki, Naoki Yoshimura
AIMS: To investigate the role of nerve growth factor (NGF) in lower urinary tract dysfunction in mice with spinal cord injury (SCI). METHODS: Using 4-week SCI mice, single-filling cystometry and external urethral sphincter (EUS)-electromyography were performed under an awake condition. In some SCI mice, anti-NGF antibodies (10 µg/kg/h) were administered for 1 or 2 weeks before the urodynamic study. NGF levels in the bladder and L6/S1 spinal cord were assayed by ELISA...
March 8, 2018: Neurourology and Urodynamics
Kai Wang, Xianmin Zhang, Jun Ota, Yanjiang Huang
This paper proposes a nonlinear correlation-based wavelet scale selection technology to select the effective wavelet scales for the estimation of handgrip force from surface electromyograms (SEMG). The SEMG signal corresponding to gripping force was collected from extensor and flexor forearm muscles during the force-varying analysis task. We performed a computational sensitivity analysis on the initial nonlinear SEMG-handgrip force model. To explore the nonlinear correlation between ten wavelet scales and handgrip force, a large-scale iteration based on the Monte Carlo simulation was conducted...
February 24, 2018: Sensors
Yao Zhang, Yanjian Liao, Xiaoying Wu, Lin Chen, Qiliang Xiong, Zhixian Gao, Xiaolin Zheng, Guanglin Li, Wensheng Hou
So far, little is known how the sample assignment of surface electromyogram (sEMG) features in training set influences the recognition efficiency of hand gesture, and the aim of this study is to explore the impact of different sample arrangements in training set on the classification of hand gestures dominated with similar muscle activation patterns. Seven right-handed healthy subjects (24.2 ± 1.2 years) were recruited to perform similar grasping tasks (fist, spherical, and cylindrical grasping) and similar pinch tasks (finger, key, and tape pinch)...
2018: Frontiers in Neurorobotics
Kazuki Mitome, Shiori Takehana, Katsuo Oshima, Yoshihito Shimazu, Mamoru Takeda
Although docosahexaenoic acid (DHA) administration suppresses sodium channels in primary afferent sensory neurons, the acute local effect of DHA on the trigeminal nociceptive reflex remains to be elucidated, in vivo. Therefore, the aim of the present study was to investigate whether local administration of DHA attenuates the nociceptive jaw-opening reflex (JOR) in vivo in the rat. The JOR evoked by electrical stimulation of the tongue was recorded by a digastric muscle electromyogram (dEMG) in pentobarbital-anesthetized rats...
February 23, 2018: Neuroscience Research
Tatsunori Watanabe, Kotaro Saito, Kazuto Ishida, Shigeo Tanabe, Ippei Nojima
To investigate the effects of aging on coordination of plantar flexor muscles during bipedal and unipedal stances, we examined a relationship between the center of pressure sway and electromyographic activity of these muscles, and also the common neural input, using a coherence analysis. Healthy young and elderly adults were asked to perform bipedal and unipedal standing. The electromyograms were recorded unilaterally from the medial and lateral gastrocnemius (MG and LG) and soleus (SL) muscles, and the common input was analyzed for MG-LG, MG-SL, and LG-SL pairs in two frequency bands: a delta band, that is associated with force variability, and a beta band, that could reflect the corticospinal drive...
February 26, 2018: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
Stavros I Dimitriadis, Christos Salis, David Linden
OBJECTIVE: Limitations of the manual scoring of polysomnograms, which include data from electroencephalogram (EEG), electro-oculogram (EOG), electrocardiogram (ECG) and electromyogram (EMG) channels have long been recognized. Manual staging is resource intensive and time consuming, and thus considerable effort must be spent to ensure inter-rater reliability. As a result, there is a great interest in techniques based on signal processing and machine learning for a completely Automatic Sleep Stage Classification (ASSC)...
January 31, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
Kazuki Fujita, Hiroichi Miaki, Akira Fujimoto, Hideaki Hori, Hitomi Fujimoto, Yasutaka Kobayashi
In hemiparetic stroke survivors, premature plantarflexor muscle activity (PPF) often appears as a gait abnormality from terminal swing to the loading response on the paretic side. This study aimed to discern factors giving rise to PPF. Lower extremity function, spasticity magnitude, and gait electromyograms were assessed in 31 hemiparetic stroke survivors. Mean amplitudes during gait phases were determined for the paretic soleus, tibialis anterior, rectus femoris, and biceps femoris. The subjects were classified into PPF and non-PPF groups based on their relative soleus amplitude at different phases of gait, and group differences in each measurement were calculated and subjected to logistic regression...
February 14, 2018: Journal of Electromyography and Kinesiology
Z Kotmanova, M Simera, M Veternik, L Martvon, J Misek, J Jakus, T Y Shen, M N Musselwhite, T Pitts, D C Bolser, I Poliacek
GABA, muscimol, and baclofen were microinjected into the rostral (rNTS) and caudal solitary tract nucleus (cNTS) in 24 anesthetized cats. Electromyograms (EMGs) of diaphragm (DIA) and abdominal muscles (ABD), blood pressure and esophageal pressure (EP) were recorded and analysed. Bilateral microinjections of 1 mM GABA (total 66 ± 4 nl), 1 mM baclofen (64 ± 4 nl) and unilateral microinjections of 0.5 mM muscimol (33 ± 1 nl) in the rNTS significantly reduced cough number (CN), amplitudes of ABD EMGs, expiratory EP, and prolonged the duration of the cough inspiratory phase...
February 20, 2018: Respiratory Physiology & Neurobiology
Zhiqiang Huang, Ning Zhao, Zhaoyuan Su, Jiafu Su, Qiang Wu
OBJECTIVE: Based on rehabilitation training, to observe the clinical effect difference between pricking combined with cupping and western medication for elbow flexion spasticity of upper limb of stroke patients. METHODS: Sixty patients were randomly assigned by SPSS software random number generator into a comprehension group and a western medication group, 30 cases in each one. Rehabilitation was used in the two groups. Pricking and cupping were applied at the affected abdominal center of biceps brachii muscle on Tuesday and Friday continuously for 4 weeks in the comprehensive group...
February 12, 2018: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
Yu Shikano, Yuji Ikegaya, Takuya Sasaki
Behavioral and cognitive studies have demonstrated that brain functions are affected by the activity states of the peripheral organs, such as the cardiac and respiratory systems. However, detailed neurophysiological mechanisms underlying the body-brain interactions remain unknown. In this study, we developed a method for manipulating activity levels of the heart using direct cardiac stimulation and vagus nerve stimulation that can be combined with recording cerebral local field potentials using a microdrive system, electrocardiograms, electromyograms, in a freely moving rat...
February 15, 2018: Neuroscience Research
Angelo Onofri, Maxime Patout, Georgios Kaltsakas, Elodie Lhuillier, Sitali Mushemi-Blake, Gill Arbane, Martino F Pengo, Philip Marino, Joerg Steier
Background: Chronic hypercapnic respiratory failure (HRF) in obesity hypoventilation syndrome (OHS) is commonly treated using non-invasive ventilation (NIV). We hypothesised that treatment of OHS would improve neural respiratory drive index (NRDI) and cardiac function. Methods: Fourteen patients (8 females) with OHS, who were admitted for initiation of domiciliary NIV, were prospectively studied. Patients had (mean ± SD): age (53±10 years), body mass index (BMI) (50...
January 2018: Journal of Thoracic Disease
Nasser A Alshammary, Daniel A Bennett, Michael Goldfarb
This paper presents a control approach for a myoelectric transhumeral prostheses that supplements a typical two-site electromyograms (EMG) input with the inertial measurement of arm motion. The inertial measurement is employed to: 1) provide synergistic movement between the prosthetic elbow joint and intact upper arm and 2) to switch control between the myoelectric elbow and hand. In order to assess the prospective efficacy of the control method, experiments were conducted on six healthy subjects who performed a series of pick-and-place tasks within a virtual environment...
February 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
Francesc Miralles
Objetive. MUNIX is a technique based on surface electromyogram (sEMG) that is gaining acceptance as a method to monitoring motor neuron loss because is reliable and produces less discomfort than other electrodiagnostic techniques aimed to the same purpose. MUNIX assumes that the relationship between the area of sEMG obtained at increasing levels of muscle activation and the values of a variable called "Ideal case motor unit count" (ICMUC), defined as the product of the ratio between area and power of the M-wave by that of the sEMG, is described by a decreasing power function...
February 9, 2018: Journal of Neural Engineering
Benio Kibushi, Shota Hagio, Toshio Moritani, Motoki Kouzaki
The regulation of walking speed is easily achieved. However, the central nervous system (CNS) must coordinate numerous muscles in order to achieve a smooth and continuous control of walking speed. To control walking speed appropriately, the CNS may need to utilize a simplified system for the control of numerous muscles. Previous studies have revealed that the CNS may control walking via muscle synergies that simplify the control of muscles by modularly organizing several muscles. We hypothesized that the CNS controls the walking speed by flexibly modulating activation of muscle synergies within one gait cycle...
2018: Frontiers in Human Neuroscience
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