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Electrical muscle stimulation

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https://www.readbyqxmd.com/read/28549566/asymmetrical-responses-of-skin-blood-flow-in-ischemic-hindlimbs-to-electrical-stimulation-of-the-unilateral-forelimb
#1
Chung-Shin Huang, Ya-Hui Sun, Yi-Ting Wang, Yu-Hung Pan, Shwu-Fen Wang, Yuan-Feen Tsai
The regulation of skin blood flow (SBF) is primarily mediated by the sympathetic nervous system, but the effects of electrical stimulation (ES) of one limb on SBF in the other limbs remain unknown. The present study investigated the effects of unilateral forelimb ES on SBF in the bilateral hindlimbs in anesthetized rats. Bilateral hindlimb ischemia was induced by tourniquet application for 60min. After reperfusion for 24h, ES (3 or 125Hz) was applied to the upper one-fourth of the triceps brachii muscle of the left or right forelimb for 30min...
May 23, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28547814/electrical-stimulation-structurally-affects-the-tissues-of-the-rectum-and-anus-of-nulliparous-rats
#2
Hugo Alves de Sousa, Maria da Glória da Silva, Keyla de Paula Barbosa, Leonora Maciel de Souza Vianna, Yolanda Galindo Pacheco, José Roberto Pimenta de Godoy, Selma Aparecida Souza Kuckelhaus
Considering that the muscles of the anus perform a critical role in maintaining continence, losses in their structure can negatively affect the physiological control of the intestinal contents. Anorectal electro-stimulation (ARES) has been reported to have a positive effect on the functionality of treated patients, but how ARES affects the structural tissues of the anorectal segment remains unknown. Because the study of how ARES structurally affects human tissues is not possible, this study aimed to clarify these effects in a murine model, which has a similar anorectal segment (structure and physiology) to humans...
May 26, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28543684/multiparity-modifies-contractile-properties-of-pelvic-muscles-affecting-the-genesis-of-vaginal-pressure-in-rabbits
#3
Rhode López-Juárez, René Zempoalteca, Dora Luz Corona-Quintanilla, Ismael Jiménez-Estrada, Francisco Castelán, Margarita Martínez-Gómez
AIMS: To characterize the contractile properties of the bulbospongiosus (Bsm), isquiocavernosus (Ism), and pubococcygeus muscles (Pcm), and their involvement in the genesis of vaginal pressure in nulliparous and multiparous rabbits. METHODS: Age-matched nulliparous and multiparous rabbits were used to record the isometric contractile responses of each muscle as well as the intravaginal pressure evoked by single square electrical pulses and stimulation trains of ascending frequency...
May 24, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28539911/the-use-of-functional-electrical-stimulation-on-the-upper-limb-and-interscapular-muscles-of-patients-with-stroke-for-the-improvement-of-reaching-movements-a-feasibility-study
#4
Alicia Cuesta-Gómez, Francisco Molina-Rueda, Maria Carratala-Tejada, Eukene Imatz-Ojanguren, Diego Torricelli, Juan Carlos Miangolarra-Page
INTRODUCTION: Reaching movements in stroke patients are characterized by decreased amplitudes at the shoulder and elbow joints and greater displacements of the trunk, compared to healthy subjects. The importance of an appropriate and specific contraction of the interscapular and upper limb (UL) muscles is crucial to achieving proper reaching movements. Functional electrical stimulation (FES) is used to activate the paretic muscles using short-duration electrical pulses. OBJECTIVE: To evaluate whether the application of FES in the UL and interscapular muscles of stroke patients with motor impairments of the UL modifies patients' reaching patterns, measured using instrumental movement analysis systems...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28539391/reevaluation-of-reflex-responses-of-the-human-masseter-muscle-to-electrical-lip-stimulation
#5
Paulius Uginčius, Gizem Yilmaz, Oguz Sebik, Kemal Sitki Turker
We examined the reflex response of the human masseter muscle to electrical stimulation of the lip using both single motor unit and surface electromyogram based methods. Using the classical analysis methods, reflex response to mild electrical stimuli generated two distinct short-lasting inhibitions. This pattern may reflect the development of combinations of short and long latency inhibitory postsynaptic potentials as a result of the mildly painful electrical lip stimulation. However, this pattern appearing in the classical analysis methods may have developed as a consequence of earlier responses and may not be genuine...
May 24, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28538831/effects-of-laryngeal-manual-therapy-lmt-and-transcutaneous-electrical-nerve-stimulation-tens-in-vocal-folds-diadochokinesis-of-dysphonic-women-a-randomized-clinical-trial
#6
Larissa Thaís Donalonso Siqueira, Kelly Cristina Alves Silverio, Alcione Ghedini Brasolotto, Rinaldo Roberto de Jesus Guirro, Christiano Giácomo Carneiro, Mara Behlau
Purpose: To verify and compare the effect of transcutaneous electrical nerve stimulation (TENS) and laryngeal manual therapy (LMT) on laryngeal diadochokinesis (DDK) of dysphonic women. Methods: Twenty women with bilateral vocal nodules participated and were equally divided into: LMT Group - LMT application; TENS Group - TENS application; both groups received 12 sessions of treatment, twice a week, with a duration of 20 minutes each, applied by the same therapist...
May 15, 2017: CoDAS
https://www.readbyqxmd.com/read/28538308/effect-of-electrical-myostimulation-on-the-function-of-lower-leg-muscles
#7
Viktoras Silinskas, Albinas GrŪnovas, Jurate Stanislovaitiene, Alfonsas Buliuolis, Eugenijus Trinkunas, Jonas Poderys
Silinskas, V, Grūnovas, A, Stanislovaitiene, J, Buliuolis, A, Trinkunas, E, and Poderys, J. Effect of electrical myostimulation on the function of lower leg muscles. J Strength Cond Res 31(6): 1577-1584, 2017-Electrical myostimulation (EMS) method is applied to improve skeletal muscle function. The aim of this study was to evaluate the efficacy of EMS applied to the sole and calf muscles on their strength and on maximal sprint performance. Each of 10 training sessions involved 10 seconds of stimulation and 50 seconds of rest for a total of 10 minutes...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28536255/neuroprotective-effect-of-electroacupuncture-and-upregulation-of-hypoxia-inducible-factor-1%C3%AE-during-acute-ischaemic-stroke-in-rats
#8
Ce Li, Tingting Zhang, Kewei Yu, Hongyu Xie, Yulong Bai, Li Zhang, Yi Wu, Nianhong Wang
BACKGROUND: Acupuncture is a traditional method that has been widely used in various fields of medicine with therapeutic effect. However, evidence of effectiveness to support the application of electroacupuncture (EA) during the process of ischaemia is scarce. OBJECTIVES: To investigate dynamic changes in hypoxia-inducible factor (HIF)-1α expression as well as its association with neurological status in rats subjected to acute ischaemic stroke and EA intervention...
May 23, 2017: Acupuncture in Medicine: Journal of the British Medical Acupuncture Society
https://www.readbyqxmd.com/read/28533379/learned-response-sequences-in-cerebellar-purkinje-cells
#9
Dan-Anders Jirenhed, Anders Rasmussen, Fredrik Johansson, Germund Hesslow
Associative learning in the cerebellum has previously focused on single movements. In eyeblink conditioning, for instance, a subject learns to blink at the right time in response to a conditional stimulus (CS), such as a tone that is repeatedly followed by an unconditional corneal stimulus (US). During conditioning, the CS and US are transmitted by mossy/parallel fibers and climbing fibers to cerebellar Purkinje cells that acquire a precisely timed pause response that drives the overt blink response. The timing of this conditional Purkinje cell response is determined by the CS-US interval and is independent of temporal patterns in the input signal...
May 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28533075/transcutaneous-electrical-nerve-stimulation-tens-and-laryngeal-manual-therapy-lmt-immediate-effects-in-women-with-dysphonia
#10
Mariana de Cásisa Macedo Conde, Larissa Thaís Donalonso Siqueira, José Eduardo Vendramini, Alcione Ghedini Brasolotto, Rinaldo Roberto de Jesus Guirro, Kelly Cristina Alves Silverio
PURPOSE: This study aimed to verify the immediate effect of low-frequency transcutaneous electrical nerve stimulation (TENS) and laryngeal manual therapy (LMT) in musculoskeletal pain, voice quality, and self-reported signs in women with dysphonia. METHOD: Thirty women with behavioral dysphonia were randomly divided into the TENS group and the LMT group. All participants fulfilled the pain survey and had their voices recorded to posterior perceptual and acoustic analysis before and after intervention...
May 19, 2017: Journal of Voice: Official Journal of the Voice Foundation
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
#11
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/28526693/a-simple-laboratory-exercise-with-rat-isolated-esophagus-and-stomach-fundus-to-reveal-functional-differences-between-striated-and-smooth-muscle-cells
#12
Francisco José Batista-Lima, Kalinne Kelly Lima Gadelha, Daniel Maia Oliveira, Thiago Brasileiro Vasconcelos, Teresinha Silva Brito, Pedro Jorge Caldas Magalhães
This study describes an undergraduate student laboratory activity using isolated preparations from rat gastrointestinal tissues that possess contractile profiles typically exhibited by striated and smooth muscle cells. While students are introduced to an ex vivo methodology, they can compare differences in trace experiments, twitch aspects, phasic and tonic properties, force-frequency relationships, and pharmacological responsiveness of esophageal (striated) and fundic (smooth muscle) segments. Muscle strips were subjected to electrical field stimulation (EFS) applied by platinum electrodes immersed in the physiological solution...
June 1, 2017: Advances in Physiology Education
https://www.readbyqxmd.com/read/28525289/high-throughput-phenotyping-of-human-induced-pluripotent-stem-cell-derived-cardiomyocytes-and-neurons-using-electric-field-stimulation-and-high-speed-fluorescence-imaging
#13
Neil J Daily, Zhong-Wei Du, Tetsuro Wakatsuki
Electrophysiology of excitable cells, including muscle cells and neurons, has been measured by making direct contact with a single cell using a micropipette electrode. To increase the assay throughput, optical devices such as microscopes and microplate readers have been used to analyze electrophysiology of multiple cells. We have established a high-throughput (HTP) analysis of action potentials (APs) in highly enriched motor neurons and cardiomyocytes (CMs) that are differentiated from human induced pluripotent stem cells (iPSCs)...
May 19, 2017: Assay and Drug Development Technologies
https://www.readbyqxmd.com/read/28524753/continuous-mapping-of-the-corticospinal-tracts-in-intramedullary-spinal-cord-tumor-surgery-using-an-electrified-ultrasonic-aspirator
#14
Ori Barzilai, Zvi Lidar, Shlomi Constantini, Khalil Salame, Yifat Bitan-Talmor, Akiva Korn
Intramedullary spinal cord tumors (IMSCTs) represent a rare entity, accounting for 4%-10% of all central nervous system tumors. Microsurgical resection of IMSCTs is currently considered the primary treatment modality. Intraoperative neurophysiological monitoring (IONM) has been shown to aid in maximizing tumor resection and minimizing neurological morbidity, consequently improving patient outcome. The gold standard for IONM to date is multimodality monitoring, consisting of both somatosensory evoked potentials, as well as muscle-based transcranial electric motor evoked potentials (tcMEPs)...
May 19, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28515080/effect-of-resistance-exercise-under-conditions-of-reduced-blood-insulin-on-ampk%C3%AE-ser485-491-inhibitory-phosphorylation-and-ampk-pathway-activation
#15
Kohei Kido, Takumi Yokokawa, Satoru Ato, Koji Sato, Satoshi Fujita
Insulin stimulates skeletal muscle glucose uptake via activation of the protein kinase B/Akt (Akt) pathway. Recent studies suggest that insulin down-regulates AMP-activated protein kinase (AMPK) activity via Ser485/491 phosphorylation of the AMPK α-subunit. Thus, lower blood insulin concentrations may induce AMPK signal activation. Acute exercise is one method to stimulate AMPK activation; however, no study has examined the relationship between blood insulin levels and acute resistance exercise-induced AMPK pathway activation...
May 17, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28513326/the-effects-of-blood-flow-restricted-electrostimulation-on-strength-hypertrophy
#16
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/28512726/cutaneous-reflex-modulation-during-obstacle-avoidance-under-conditions-of-normal-and-degraded-visual-input
#17
Daniel S Marigold, Andrew J Chang, Kim Lajoie
The nervous system integrates visual input regarding obstacles with limb-based sensory feedback to allow an individual to safely negotiate the environment. This latter source can include cutaneous information from the foot, particularly in the event that limb trajectory is not sufficient and there is an unintended collision with the object. However, it is not clear the extent to which cutaneous reflexes are modified based on visual input. In this study, we first determined if phase-dependent modulation of these reflexes is present when stepping over an obstacle during overground walking...
May 16, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28511871/effect-of-distigmine-on-the-contractile-response-of-guinea-pig-urinary-bladder-to-electrical-field-stimulation
#18
Keisuke Obara, Yurina Kobayashi, Daisuke Chino, Yoshio Tanaka
Distigmine bromide (distigmine) is a reversible carbamate group cholinesterase (ChE) inhibitor. Although mainly used clinically for the treatment of myasthenia gravis, distigmine is also indicated for detrusor underactivity in Japan. According to the pharmacological classification of distigmine, its therapeutic effect against detrusor underactivity appears to be produced by enhanced urinary bladder smooth muscle (UBSM) contractility due to an increased concentration of acetylcholine between parasympathetic nerve endings and UBSM cells...
May 13, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28509762/beetroot-juice-increases-human-muscle-force-without-changing-ca2-handling-proteins
#19
Jamie Whitfield, Daniel Gamu, George J F Heigenhauser, Luc J C van Loon, Lawrence L Spriet, A Russell Tupling, Graham P Holloway
Dietary inorganic nitrate (NO3) supplementation improves skeletal muscle (SkM) contractile efficiency, and while rodent literature has suggested improvements in calcium handling or redox modifications as likely explanations, the direct mechanism-of-action in humans remains unknown. PURPOSE: To examine the effects of 7-d of beetroot juice (BRJ) supplementation on SkM contractile characteristics and function. METHODS: Recreationally active males (n=8) underwent transcutaneous electrical muscle stimulation of the vastus lateralis for evaluation of contractile characteristics before (pre) and after (post) 7-d of BRJ supplementation (280 mL/day, ~26 mmol NO3)...
May 15, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28503316/recovery-of-supraspinal-control-of-leg-movement-in-a-chronic-complete-flaccid-paraplegic-man-after-continuous-low-frequency-pelvic-nerve-stimulation-and-fes-assisted-training
#20
Marc Possover, Axel Forman
INTRODUCTION: More than 30 years ago, functional electrical stimulation (FES) was developed as an orthotic system to be used for rehabilitation for SCI patients. In the present case report, FES-assisted training was combined with continuous low-frequency stimulation of the pelvic somatic nerves in a SCI patient. CASE PRESENTATION: We report on unexpected findings in a 41-year-old man with chronic complete flaccid paraplegia, since he was 18 years old, who underwent spinal stem cell therapy and a laparoscopic implantation of neuroprosthesis (LION procedure) in the pelvic lumbosacral nerves...
2017: Spinal Cord Series and Cases
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