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Neuromuscular electrical stimulation

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https://www.readbyqxmd.com/read/28534754/the-icvsie-a-general-purpose-integral-equation-method-for-bio-electromagnetic-analysis
#1
Luis J Gomez, Abdulkadir C Yucel, Eric Michielssen
An internally combined volume surface integral equation (ICVSIE) for analyzing electromagnetic (EM) interactions with biological tissue and wide ranging diagnostic, therapeutic, and research applications, is proposed. METHOD: The ICVSIE is a system of integral equations in terms of volume and surface equivalent currents in biological tissue subject to fields produced by externally or internally positioned devices. The system is created by using equivalence principles and solved numerically; the resulting current values are used to evaluate scattered and total electric fields, specific absorption rates, and related quantities...
May 16, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28527228/efficacy-of-neuromuscular-electrical-stimulation-for-preventing-quadriceps-muscle-wasting-in-patients-with-moderate-or-severe-acute-stroke-a-pilot-study
#2
Masafumi Nozoe, Masashi Kanai, Hiroki Kubo, Yuka Takeuchi, Miki Kobayashi, Miho Yamamoto, Asami Furuichi, Makoto Yamazaki, Shinichi Shimada, Kyoshi Mase
BACKGROUND: Stroke-related muscle wasting is one of the factors leading to long-term disability and functional dependency. No study has reported an effective therapeutic intervention for such muscle wasting. OBJECTIVE: The purpose of this study was to investigate the effects of neuromuscular electrical stimulation (NMES) on quadriceps muscle mass preservation in patients with acute moderate or severe stroke by using ultrasonography (US). METHODS: Twenty patients with acute, moderate, or severe stroke (age: 68±11 years) were divided into usual care group (control group) and intervention groups (NMES group), respectively...
May 19, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28513326/the-effects-of-blood-flow-restricted-electrostimulation-on-strength-hypertrophy
#3
Joshua Slysz, Jamie F Burr
CONTEXT: The combined effect of neuromuscular electrical muscle stimulation (NMES) and blood flow restriction (BFR) on muscle mass and strength has not been thoroughly investigated. OBJECTIVE: To examine the effects of combined and independent BFR and a low-intensity NMES on skeletal muscle adaptation. DESIGN: Exploratory Study. SETTING: Laboratory. PARTICIPANTS: Twenty recreationally active subjects...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28482746/neuromuscular-electrical-stimulation-combined-with-protein-ingestion-preserves-thigh-muscle-mass-but-not-muscle-function-in-healthy-older-adults-during-5-days-of-bed-rest
#4
Paul Reidy, Alec McKenzie, Preston Brunker, Daniel Nelson, Katherine Barrows, Mark Supiano, Paul LaStayo, Micah Drummond
Short-term bed rest in older adults is characterized by significant loss in leg lean mass and strength posing significant health consequences. The purpose of this study was to determine in healthy older adults if the daily combination of neuromuscular electrical stimulation and protein supplementation (NMES+PRO) would protect muscle mass and function after 5-days of bed rest. Twenty healthy older adults (~70y) were subjected to 5-days of continuous bed rest and were randomized into one of two groups: NMES+PRO (n=10) or CON (n=10)...
May 8, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/28464800/effect-of-tendon-vibration-during-wide-pulse-neuromuscular-electrical-stimulation-nmes-on-the-decline-and-recovery-of-muscle-force
#5
Vanesa Bochkezanian, Robert U Newton, Gabriel S Trajano, Amilton Vieira, Timothy S Pulverenti, Anthony J Blazevich
BACKGROUND: Neuromuscular electrical stimulation (NMES) is commonly used to activate skeletal muscles and reverse muscle atrophy in clinical populations. Clinical recommendations for NMES suggest the use of short pulse widths (100-200 μs) and low-to-moderate pulse frequencies (30-50 Hz). However, this type of NMES causes rapid muscle fatigue due to the (non-physiological) high stimulation intensities and non-orderly recruitment of motor units. The use of both wide pulse widths (1000 μs) and tendon vibration might optimize motor unit activation through spinal reflex pathways and thus delay the onset of muscle fatigue, increasing muscle force and mass...
May 2, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28459163/effects-of-mirror-therapy-combined-with-neuromuscular-electrical-stimulation-on-motor-recovery-of-lower-limbs-and-walking-ability-of-patients-with-stroke-a-randomized-controlled-study
#6
Qun Xu, Feng Guo, Hassan M Abo Salem, Hong Chen, Xiaolin Huang
OBJECTIVE: To investigate the effectiveness of mirror therapy combined with neuromuscular electrical stimulation in promoting motor recovery of the lower limbs and walking ability in patients suffering from foot drop after stroke. DESIGN: Randomized controlled study. SETTING: Inpatient rehabilitation center of a teaching hospital. SUBJECTS: Sixty-nine patients with foot drop. INTERVENTION: Patients were randomly divided into three groups: control, mirror therapy, and mirror therapy + neuromuscular electrical stimulation...
April 1, 2017: Clinical Rehabilitation
https://www.readbyqxmd.com/read/28458806/the-contribution-of-neuromuscular-stimulation-in-elucidating-muscle-plasticity-revisited
#7
REVIEW
Dirk Pette, Gerta Vrbová
Studies carried out during the past 45 years on the effects of chronic low-frequency stimulation on skeletal muscle have revealed a multiplicity of adaptive changes of muscle fibres in response to increased activity. As reflected by induced changes in the metabolic properties, protein profiles of the contractile machinery and elements of the Ca(2+)-regulatory system, all essential components of the muscle fibre undergo pronounced changes in their properties that ultimately lead to their reversible transformation from fast-to-slow phenotype...
February 24, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/28446586/muscle-synergies-obtained-from-comprehensive-mapping-of-the-primary-motor-cortex-forelimb-representation-using-high-frequency-long-duration-icms
#8
Sommer L Amundsen Huffmaster, Gustaf M Van Acker, Carl W Luchies, Paul D Cheney
Simplifying neuromuscular control for movement has previously been explored by extracting muscle synergies from voluntary movement electromyography (EMG) patterns. The purpose of this study was to investigate muscle synergies represented in EMG recordings associated with direct electrical stimulation of single sites in primary motor cortex (M1). We applied single electrode high-frequency, long-duration intracortical microstimulation (HFLD-ICMS) to the forelimb region of M1 in two rhesus macaques using parameters previously found to produce forelimb movements to stable spatial endpoints (90-150 Hz, 90-150 μA, 1000 ms stimulus train lengths)...
April 26, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28446181/a-neuromuscular-electrical-stimulation-nmes-and-robot-hybrid-system-for-multi-joint-coordinated-upper-limb-rehabilitation-after-stroke
#9
Wei Rong, Waiming Li, Mankit Pang, Junyan Hu, Xijun Wei, Bibo Yang, Honwah Wai, Xiaoxiang Zheng, Xiaoling Hu
BACKGROUND: It is a challenge to reduce the muscular discoordination in the paretic upper limb after stroke in the traditional rehabilitation programs. METHOD: In this study, a neuromuscular electrical stimulation (NMES) and robot hybrid system was developed for multi-joint coordinated upper limb physical training. The system could assist the elbow, wrist and fingers to conduct arm reaching out, hand opening/grasping and arm withdrawing by tracking an indicative moving cursor on the screen of a computer, with the support from the joint motors and electrical stimulations on target muscles, under the voluntary intention control by electromyography (EMG)...
April 26, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28436401/effects-of-amplitude-and-phase-duration-modification-on-electrically-induced-contraction-force-and-discomfort
#10
Shmuel Springer, Maxim Shapiro
BACKGROUND: Neuromuscular electrical stimulation (NMES) is commonly used in rehabilitation. However, the optimal combination of phase-duration and amplitude for enhancing motor output is not yet resolved. OBJECTIVE: To test the effects of increasing phase-duration and amplitude on isometric knee extension force and discomfort, while controlling the effects of electrode-skin resistance and body mass index (BMI). METHODS: Twenty-one healthy volunteers participated in the study...
April 14, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28435743/effects-of-overground-locomotor-training-on-the-ventilatory-response-to-volitional-treadmill-walking-in-individuals-with-incomplete-spinal-cord-injury-a-pilot-study
#11
Gino S Panza, Andrew A Guccione, Lisa M Chin, Jared M Gollie, Jeffery E Herrick, John P Collins
INTRODUCTION: Although there has been substantial emphasis on the neuromuscular and cardiovascular adaptations following rehabilitation, pulmonary adaptations in individuals with incomplete SCI (iSCI) in response to locomotor training have been less frequently studied. In healthy individuals, effective transition from rest to work is accomplished by a hyperpneic response, which exhibits an exponential curve with three phases. However, the degree to which our current understanding of exercise hyperpnea can be applied to individuals with iSCI is unknown...
2017: Spinal Cord Series and Cases
https://www.readbyqxmd.com/read/28432420/sex-differences-in-neuromuscular-function-after-repeated-eccentric-contractions-of-the-knee-extensor-muscles
#12
Andrea Lee, Jake Baxter, Claire Eischer, Matt Gage, Sandra Hunter, Tejin Yoon
PURPOSE: This study examined the mechanisms for force and power reduction during and up to 48 h after maximal eccentric contractions of the knee extensor muscles in young men and women. METHODS: 13 men (22.8 ± 2.6 years) and 13 women (21.6 ± 2.2 years) performed 150 maximal effort eccentric contractions (5 sets of 30) with the knee extensor muscles at 60° s(-1). Maximal voluntary isometric contractions (MVIC) and maximal voluntary concentric contractions (MVCC) were performed before and after the 150 eccentric contractions...
April 21, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28424583/a-rodent-model-of-dynamic-facial-reanimation-using-functional-electrical-stimulation
#13
Mark A Attiah, Julius de Vries, Andrew G Richardson, Timothy H Lucas
Facial paralysis can be a devastating condition, causing disfiguring facial droop, slurred speech, eye dryness, scarring and blindness. This study investigated the utility of closed-loop functional electric stimulation (FES) for reanimating paralyzed facial muscles in a quantitative rodent model. The right buccal and marginal mandibular branches of the rat facial nerve were transected for selective, unilateral paralysis of whisker muscles. Microwire electrodes were implanted bilaterally into the facial musculature for FES and electromyographic (EMG) recording...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28420958/electrical-stimulation-of-afferent-pathways-for-the-suppression-of-pathological-tremor
#14
Jakob L Dideriksen, Christopher M Laine, Strahinja Dosen, Silvia Muceli, Eduardo Rocon, José L Pons, Julian Benito-Leon, Dario Farina
Pathological tremors are involuntary oscillatory movements which cannot be fully attenuated using conventional treatments. For this reason, several studies have investigated the use of neuromuscular electrical stimulation for tremor suppression. In a recent study, however, we found that electrical stimulation below the motor threshold also suppressed tremor, indicating involvement of afferent pathways. In this study, we further explored this possibility by systematically investigating how tremor suppression by afferent stimulation depends on the stimulation settings...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28394724/a-multimodal-nonpharmacologic-intervention-improves-mood-and-cognitive-function-in-people-with-multiple-sclerosis
#15
Jennifer E Lee, Babita Bisht, Michael J Hall, Linda M Rubenstein, Rebecca Louison, Danielle T Klein, Terry L Wahls
OBJECTIVE: The objective of this study was to examine whether participation in a 12-month multimodal intervention would improve mood and cognitive function in adults with progressive multiple sclerosis (MS). METHODS: In this one-arm, open-label feasibility trial, participants were prescribed a home-based multimodal intervention, including (1) a modified Paleolithic diet; (2) an exercise program (stretching and strengthening of the trunk and lower limb muscles); (3) neuromuscular electrical stimulation (EStim) of trunk and lower limb muscles; and (4) stress management (meditation and self-massage)...
March 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28392766/presence-and-absence-of-muscle-contraction-elicited-by-peripheral-nerve-electrical-stimulation-differentially-modulate-primary-motor-cortex-excitability
#16
Ryoki Sasaki, Shinichi Kotan, Masaki Nakagawa, Shota Miyaguchi, Sho Kojima, Kei Saito, Yasuto Inukai, Hideaki Onishi
Modulation of cortical excitability by sensory inputs is a critical component of sensorimotor integration. Sensory afferents, including muscle and joint afferents, to somatosensory cortex (S1) modulate primary motor cortex (M1) excitability, but the effects of muscle and joint afferents specifically activated by muscle contraction are unknown. We compared motor evoked potentials (MEPs) following median nerve stimulation (MNS) above and below the contraction threshold based on the persistence of M-waves. Peripheral nerve electrical stimulation (PES) conditions, including right MNS at the wrist at 110% motor threshold (MT; 110% MNS condition), right MNS at the index finger (sensory digit nerve stimulation [DNS]) with stimulus intensity approximately 110% MNS (DNS condition), and right MNS at the wrist at 90% MT (90% MNS condition) were applied...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28388333/blunted-myoglobin-and-quadriceps-soreness-after-electrical-stimulation-during-the-luteal-phase-or-oral-contraception
#17
Lindsey J Anderson, Lucinda L Baker, E Todd Schroeder
PURPOSE: Acute muscle damage after exercise triggers subsequent regeneration, leading to hypertrophy and increased strength after repeated exercise. It has been debated whether acute exercise-induced muscle damage is altered under various premenopausal estrogen conditions. Acute contraction-induced muscle damage was compared during exogenous (oral contraceptive, OC), endogenous (luteal phase, HI), or low (menses, LO) estrogen in healthy young women aged 21 to 30 years old. METHODS: Women (OC, n = 9; HI, n = 9; LO, n = 8; total N = 26) performed 1 neuromuscular electrical stimulation (NMES) bout...
June 2017: Research Quarterly for Exercise and Sport
https://www.readbyqxmd.com/read/28377392/effects-of-testosterone-and-evoked-resistance-exercise-after-spinal-cord-injury-terex-sci-study-protocol-for-a-randomised-controlled-trial
#18
Ashraf S Gorgey, Refka E Khalil, Ranjodh Gill, Laura C O'Brien, Timothy Lavis, Teodoro Castillo, David X Cifu, Jeannie Savas, Rehan Khan, Christopher Cardozo, Edward J Lesnefsky, David R Gater, Robert A Adler
INTRODUCTION: Individuals with spinal cord injury (SCI) are at a lifelong risk of obesity and chronic metabolic disorders including insulin resistance and dyslipidemia. Within a few weeks of injury, there is a significant decline in whole body fat-free mass, particularly lower extremity skeletal muscle mass, and subsequent increase in fat mass (FM). This is accompanied by a decrease in anabolic hormones including testosterone. Testosterone replacement therapy (TRT) has been shown to increase skeletal muscle mass and improve metabolic profile...
April 4, 2017: BMJ Open
https://www.readbyqxmd.com/read/28374487/gastric-neuromuscular-histology-in-patients-with-refractory-gastroparesis-relationships-to-etiology-gastric-emptying-and-response-to-gastric-electric-stimulation
#19
J Heckert, R M Thomas, H P Parkman
BACKGROUND: The aims of this study were to describe the histology in gastroparesis, specifically to relate histopathology to etiology of gastroparesis (idiopathic and diabetic gastroparesis), gastric emptying, and clinical response to gastric electric stimulation. METHODS: Full thickness gastric body sections obtained during insertion of gastric stimulator in gastroparetics were stained with Hematoxylin & Eosin, Masson Trichrome and immunohistochemical stains for Neuron-Specific Enolase and c-Kit...
April 4, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28364678/effect-of-neuromuscular-stimulation-and-individualized-rehabilitation-on-muscle-strength-in-intensive-care-unit-survivors-a-randomized-trial
#20
Irini Patsaki, Vasiliki Gerovasili, Georgios Sidiras, Eleftherios Karatzanos, Georgios Mitsiou, Emmanuel Papadopoulos, Anna Christakou, Christina Routsi, Anastasia Kotanidou, Serafim Nanas
PURPOSE: Intensive Care Unit (ICU) survivors experience muscle weakness leading to restrictions in functional ability. Neuromuscular electrical stimulation (NMES) has been an alternative to exercise in critically ill patients. The aim of our study was to investigate its effects along with individualized rehabilitation on muscle strength of ICU survivors. MATERIAL AND METHODS: Following ICU discharge, 128 patients (age: 53±16years) were randomly assigned to daily NMES sessions and individualized rehabilitation (NMES group) or to control group...
March 22, 2017: Journal of Critical Care
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