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https://www.readbyqxmd.com/read/28211794/test-retest-reliability-of-muscle-fiber-conduction-velocity-and-fractal-dimension-of-surface-emg-during-isometric-contractions
#1
Matteo Beretta-Piccoli, Giuseppe D'Antona, Cristian Zampella, Marco Barbero, Ron Clijsen, Corrado Cescon
The aim of this study was to determine the test-retest reliability of muscle fiber conduction velocity (CV) and fractal dimension (FD) obtained from multichannel surface electromyographic (sEMG) recordings. Forty healthy recreationally active subjects (20 men and 20 women) performed two elbow flexions on two trials with a 1-week interval. The first was a 20% maximal voluntary contraction (MVC) of 120 s, and the second at 60% MVC held until exhaustion. sEMG signals were detected from the biceps brachii, using bi-dimensional arrays...
February 17, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28203220/proof-of-concept-of-an-online-emg-based-decoding-of-hand-postures-and-individual-digit-forces-for-prosthetic-hand-control
#2
Alycia Gailey, Panagiotis Artemiadis, Marco Santello
INTRODUCTION: Options currently available to individuals with upper limb loss range from prosthetic hands that can perform many movements, but require more cognitive effort to control, to simpler terminal devices with limited functional abilities. We attempted to address this issue by designing a myoelectric control system to modulate prosthetic hand posture and digit force distribution. METHODS: We recorded surface electromyographic (EMG) signals from five forearm muscles in eight able-bodied subjects while they modulated hand posture and the flexion force distribution of individual fingers...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28202889/treatment-of-transthyretin-familial-amyloid-polyneuropathy-with-tafamidis-a-case-report
#3
Yoshimichi Miyazaki
INTRODUCTION: Familial amyloid polyneuropathy (FAP) is a rare hereditary disorder caused by mutations in the transthyretin (TTR) gene. Tafamidis is a TTR stabilizer able to prevent TTR tetramer dissociation, and several studies have demonstrated its safety and efficacy at slowing the progression of neuropathy in FAP caused by the TTR Val30Met mutation. However, nerve conduction study (NCS) and electromyography (EMG) results have yet to be reported in relation to FAP progression during tafamidis therapy...
2017: Nihon Ronen Igakkai Zasshi. Japanese Journal of Geriatrics
https://www.readbyqxmd.com/read/28197674/role-of-vision-in-sighted-and-blind-soccer-players-in-adapting-to-an-unstable-balance-task
#4
María Campayo-Piernas, Carla Caballero, David Barbado, Raúl Reina
This study tested whether a compensatory hypothesis exists on postural control during standing unstable balance tasks comparing blind soccer players (n = 7) to sighted soccer players (n = 15) and sighted sedentary individuals (n = 6). All subjects performed a pre-test, a training of ten practice trials on a single day, and a post-test balance test. All tests were performed on an unstable surface placed on a force platform and under closed-eyes conditions, and a final test was performed with open eyes...
February 14, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28192854/ingestion-of-trp-channel-agonists-attenuates-exercise-induced-muscle-cramps
#5
Daniel H Craighead, Sean W Shank, Jinger S Gottschall, Dennis H Passe, Bob Murray, Lacy M Alexander, W Larry Kenney
: Exercise associated muscle cramping (EAMC) is a poorly understood problem that is neuromuscular in origin. Ingestion of transient receptor potential (TRP) channel agonists has been efficacious in attenuating electrically-induced muscle cramps. PURPOSE: To examine the effect of TRP agonist ingestion on voluntarily-induced EAMC and motor function. METHODS: Study 1: 39 subjects completed 2 trials after ingesting TRP agonist-containing active treatment (A), or vehicle (V) control...
February 13, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28192488/does-dystonic-muscle-activity-affect-sense-of-effort-in-cervical-dystonia
#6
Loïc Carment, Marc A Maier, Sophie Sangla, Vincent Guiraud, Serge Mesure, Marie Vidailhet, Påvel G Lindberg, Jean-Pierre Bleton
BACKGROUND: Focal dystonia has been associated with deficient processing of sense of effort cues. However, corresponding studies are lacking in cervical dystonia (CD). We hypothesized that dystonic muscle activity would perturb neck force control based on sense of effort cues. METHODS: Neck extension force control was investigated in 18 CD patients with different clinical features (7 with and 11 without retrocollis) and in 19 control subjects. Subjects performed force-matching and force-maintaining tasks at 5% and 20% of maximum voluntary contraction (MVC)...
2017: PloS One
https://www.readbyqxmd.com/read/28192079/electrical-neuromodulation-of-the-cervical-spinal-cord-facilitates-forelimb-skilled-function-recovery-in-spinal-cord-injured-rats
#7
Monzurul Alam, Guillermo Garcia-Alias, Benita Jin, Jonathan Keyes, Hui Zhong, Roland R Roy, Yury Gerasimenko, Daniel C Lu, V Reggie Edgerton
Enabling motor control by epidural electrical stimulation of the spinal cord is a promising therapeutic technique for the recovery of motor function after a spinal cord injury (SCI). Although epidural electrical stimulation has resulted in improvement in hindlimb motor function, it is unknown whether it has any therapeutic benefit for improving forelimb fine motor function after a cervical SCI. We tested whether trains of pulses delivered at spinal cord segments C6 and C8 would facilitate the recovery of forelimb fine motor control after a cervical SCI in rats...
February 9, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28183689/game-based-rehabilitation-for-myoelectric-prosthesis-control
#8
Cosima Prahm, Ivan Vujaklija, Fares Kayali, Peter Purgathofer, Oskar C Aszmann
BACKGROUND: A high number of upper extremity myoelectric prosthesis users abandon their devices due to difficulties in prosthesis control and lack of motivation to train in absence of a physiotherapist. Virtual training systems, in the form of video games, provide patients with an entertaining and intuitive method for improved muscle coordination and improved overall control. Complementary to established rehabilitation protocols, it is highly beneficial for this virtual training process to start even before receiving the final prosthesis, and to be continued at home for as long as needed...
February 9, 2017: JMIR Serious Games
https://www.readbyqxmd.com/read/28182676/the-swimming-test-is-effective-for-evaluating-spasticity-after-contusive-spinal-cord-injury
#9
Youngjae Ryu, Toru Ogata, Motoshi Nagao, Taku Kitamura, Kazuhito Morioka, Yoshinori Ichihara, Toru Doi, Yasuhiro Sawada, Masami Akai, Ryohei Nishimura, Naoki Fujita
Spasticity is a frequent chronic complication in individuals with spinal cord injury (SCI). However, the severity of spasticity varies in patients with SCI. Therefore, an evaluation method is needed to determine the severity of spasticity. We used a contusive SCI model that is suitable for clinical translation. In this study, we examined the feasibility of the swimming test and an EMG for evaluating spasticity in a contusive SCI rat model. Sprague-Dawley rats received an injury at the 8th thoracic vertebra...
2017: PloS One
https://www.readbyqxmd.com/read/28179011/cardiorespiratory-and-metabolic-responses-to-body-mass-based-squat-exercise-in-young-men
#10
Miki Haramura, Yohei Takai, Takaya Yoshimoto, Masayoshi Yamamoto, Hiroaki Kanehisa
BACKGROUND: The purpose of this study was to quantify cardiorespiratory and metabolic responses to body mass-based squat exercise, with specific emphasis on the relationships with the exercise duration. METHODS: Fifteen healthy young men performed body mass-based squat exercise as well as an incremental loaded bicycle test, which determine maximal oxygen uptake and maximal heart rate, with an interval of 2 days between the tests. During both tasks, oxygen uptake, blood lactate concentration (BLa), and heart rate (HR) were determined...
February 8, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28170449/a-systematic-review-of-surface-electromyography-analyses-of-the-bench-press-movement-task
#11
Petr Stastny, Artur Gołaś, Dusan Blazek, Adam Maszczyk, Michał Wilk, Przemysław Pietraszewski, Miroslav Petr, Petr Uhlir, Adam Zając
BACKGROUND: The bench press exercise (BP) plays an important role in recreational and professional training, in which muscle activity is an important multifactorial phenomenon. The objective of this paper is to systematically review electromyography (EMG) studies performed on the barbell BP exercise to answer the following research questions: Which muscles show the greatest activity during the flat BP? Which changes in muscle activity are related to specific conditions under which the BP movement is performed? STRATEGY: PubMed, Scopus, Web of Science and Cochrane Central Register of Controlled Trials (CENTRAL) in the Cochrane Library were searched through June 10, 2016...
2017: PloS One
https://www.readbyqxmd.com/read/28166876/development-of-a-usability-evaluation-method-using-natural-product-use-motion
#12
Joonho Chang, Kihyo Jung, Wonsup Lee, Heecheon You
The present study developed and tested a new usability evaluation method which considers natural product-use motions. The proposed method measures both natural product-use motions (NMs) and actual product-use motions (AMs) for a product using an optical motion capture system and examines the usability of the product based on motion similarity (MS; %) between NMs and AMs. The proposed method was applied to a usability test of four vacuum cleaners (A, B, C, and D) with 15 participants and their MSs were compared with EMG measurements and subjective discomfort ratings...
April 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28160750/repetitive-peripheral-magnetic-neurostimulation-of-multifidus-muscles-combined-with-motor-training-influences-spine-motor-control-and-chronic-low-back-pain
#13
Hugo Massé-Alarie, Louis-David Beaulieu, Richard Preuss, Cyril Schneider
OBJECTIVE: The study tested whether combining repetitive peripheral magnetic stimulation (RPMS) and motor training of the superficial multifidus muscle (MF) better improved the corticomotor control of spine than training alone in chronic low back pain (CLBP). METHODS: Twenty-one participants with CLBP were randomly allocated to [RPMS+training] and [Sham+training] groups for three sessions (S1-S3) over a week where MF was stimulated before training (volitional contraction)...
March 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28149354/investigating-the-effects-of-typical-rowing-strength-training-practices-on-strength-and-power-development-and-2-000-m-rowing-performance
#14
Thomas Ian Gee, Nicholas Caplan, Karl Christian Gibbon, Glyn Howatson, Kevin Grant Thompson
This study aimed to determine the effects of a short-term, strength training intervention, typically undertaken by club-standard rowers, on 2,000 m rowing performance and strength and power development. Twenty-eight male rowers were randomly assigned to intervention or control groups. All participants performed baseline testing involving assessments of muscle soreness, creatine kinase activity (CK), maximal voluntary contraction (leg-extensors) (MVC), static-squat jumps (SSJ), counter-movement jumps (CMJ), maximal rowing power strokes (PS) and a 2,000 m rowing ergometer time-trial (2,000 m) with accompanying respiratory-exchange and electromyography (EMG) analysis...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28129590/functional-implications-of-muscle-co-contraction-during-gait-in-advanced-age
#15
Justine Lo, On-Yee Lo, Erin A Olson, Daniel Habtemariam, Ikechukwu Iloputaife, Margaret M Gagnon, Brad Manor, Lewis A Lipsitz
Older adults often exhibit high levels of lower extremity muscle co-contraction, which may be the cause or effect of age-related impairments in gait and associated falls. Normal gait requires intact executive function and thus can be slowed by challenging executive resources available to the neuromuscular system through the performance of a dual task. We therefore investigated associations between lower limb co-contraction and gait characteristics under normal and dual task conditions in healthy older adults (85...
January 20, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28120443/effect-of-voided-volume-on-voiding-patterns-and-reliability-of-uroflowmetry-electromyography-results-in-children-with-lower-urinary-tract-dysfunction
#16
M Murat Dayanc, Yusuf Kibar, H Cem Irkilata, Ahmet A Sancaktutar, Turgay Ebiloglu, Ahmet Gur, Giray Ergin, Bilal F Alp, Faysal Gok
OBJECTIVE: To examine whether voided volume (VV) could change the uroflow patterns and result in children with lower urinary tract dysfunction (LUTD). METHODS: Between January 2009 and May 2010, the children with LUTD were enrolled in this study. Uroflowmetry (UF) combined with electromyography (EMG) was performed two times and was reviewed independently by two urologists. UF-EMG curves were classified as bell, staccato, intermittent, plateau, and tower. Patients' expected bladder capacity (EBC) and VV were recorded...
January 2017: Lower Urinary Tract Symptoms
https://www.readbyqxmd.com/read/28118311/acute-effects-of-static-stretching-of-hamstring-on-performance-and-acl-injury-risk-during-stop-jump-and-cutting-tasks-in-female-athletes
#17
Mianfang Ruan, Qiang Zhang, Xie Wu
There is limited research investigating antagonist stretch. The purpose of this study was to evaluate the influence of SSH on performance and ACL injury risk during stop-jump and 180° cutting tasks. Twelve female college athletes (age 20.8 ± 0.7 years; height 1.61 ± 0.05 m; mass 54.25 ± 4.22 kg) participated in this study. Subjects performed stop-jump and 180° cutting tasks under two conditions: after warm-up with 4×30 s SSH or after warm-up without SSH. Three-dimensional kinematic and kinetic data as well as EMG of biceps femoris (BF), rectus femoris (RF), vastus medialis (VM), and gastrocnemius medialis (GM) were collected during testing...
January 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28114024/biofeedback-signals-for-robotic-rehabilitation-assessment-of-wrist-muscle-activation-patterns-in-healthy-humans
#18
Marianna Semprini, Anna Vera Cuppone, Ioannis Delis, Velentina Squeri, Stefano Panzeri, Juergen Konczak
Electrophysiological recordings from human muscles can serve as control signals for robotic rehabilitation devices. Given that many diseases affecting the human sensorimotor system are associated with abnormal patterns of muscle activation, such biofeedback can optimize human-robot interaction and ultimately enhance motor recovery. To understand how mechanical constraints and forces imposed by a robot affect muscle synergies, we mapped the muscle activity of 7 major arm muscles in healthy individuals performing goal-directed discrete wrist movements constrained by a wrist robot...
December 6, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28113559/development-of-an-emg-acc-based-upper-limb-rehabilitation-training-system
#19
Ling Liu, Xiang Chen, Zhiyuan Lu, Shuai Cao, De Wu, Xu Zhang
This paper focuses on the development of an upper limb rehabilitation training system designed for use by children with cerebral palsy (CP). It attempts to meet the requirements of in-home training by taking advantage of the combination of portable accelerometers (ACC) and surface electromyography (SEMG) sensors worn on the upper limb to capture functional movements. In the proposed system, the EMG-ACC acquisition device works essentially as wireless game controller, and three rehabilitation games were designed for improving upper limb motor function under a clinician's guidance...
April 29, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28095102/electromyographic-analysis-of-gluteus-maximus-and-hamstring-activity-during-the-supine-resisted-hip-extension-exercise-versus-supine-unilateral-bridge-to-neutral
#20
James W Youdas, James P Hartman, Brooke A Murphy, Ashley M Rundle, Jenna M Ugorowski, John H Hollman
Hip extension strengthening exercises which maximize gluteus maximus contributions and minimize hamstring influences may be beneficial for persons with hip pain. This study's aim was to compare muscle activation of the gluteus maximus and hamstrings from healthy subjects during a supine resisted hip extension exercise versus supine unilateral bridge to neutral. Surface electromyographic (EMG) signals were obtained from the right gluteus maximus and hamstrings in 13 healthy male and 13 healthy female subjects...
February 2017: Physiotherapy Theory and Practice
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