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Electrical Muscle Stimulation 

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https://www.readbyqxmd.com/read/28237919/the-relation-between-the-frequency-of-short-pulse-electrical-stimulation-of-afferent-nerve-fibers-and-evoked-muscle-force
#1
Jakob L Dideriksen, Kasper Leerskov, Magdalena Czyzewska, Rune Rasmussen
OBJECTIVE: Functional electrical stimulation (FES) is conventionally performed by the stimulation of motor axons causing the muscle fibers innervated by these axons to contract. An alternative strategy that may evoke contractions with more natural motor unit behavior is to stimulate afferent fibers (primarily type Ia) to excite the motor neurons at the spinal level. The aim of the study was to investigate the range of forces that can be evoked in this way and the degree to which the torque can be controlled...
February 20, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28235530/intraoperative-aberrant-bispectral-index-values-due-to-facial-nerve-monitoring
#2
Dhritiman Chakrabarti, Rohini Mrugank Surve, Deepti Bs, Dheeraj Masapu
Bispectral index is an accepted depth of anaesthesia monitor for guiding intraoperative hypnotic agent administration. Frontalis EMG displayed on BIS monitor may increase due to twitching of frontalis muscle. EMG increases are also known to cause artefactual increases in BIS values. We report a case of artefactual increase of EMG and subsequently BIS values, due to electrical artefact from cranial nerve stimulator being used to identify the facial nerve. An explanation of the effect of stimulator signal on BIS EMG and BIS values has been provided...
February 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28229639/muscle-plasticity-related-to-changes-in-tubulin-and-%C3%AE-b-crystallin-levels-induced-by-eccentric-contraction-in-rat-skeletal-muscles
#3
H Jee, E Ochi, T Sakurai, J-Y Lim, K Nakazato, H Hatta
We used the model of eccentric contraction of the hindlimb muscle by Ochi et al. to examine the role of eccentric contraction in muscle plasticity. This model aims to focus on stimulated skeletal muscle responses by measuring tissue weights and tracing the quantities of αB-crystallin and tubulin. The medial gastrocnemius muscle (GCM) responded to electrically induced eccentric contraction (EIEC) with significant increases in tissue weight (p < 0.01) and the ratio of tissue weight to body weight (p < 0...
September 2016: Physiol Int
https://www.readbyqxmd.com/read/28229237/different-recoveries-of-the-first-and-second-phases-of-the-m-wave-after-intermittent-maximal-voluntary-contractions
#4
Javier Rodriguez-Falces, Nicolas Place
PURPOSE: We investigated the recovery of muscle electrical properties after intermittent intense exercise by examining separately the first and second phases of the muscle compound action potential (M-wave). METHODS: M-waves and mechanical twitches were obtained using femoral nerve stimulation throughout the 30-min recovery period following 48 successive intermittent 3-s MVCs. The amplitude, duration, and area of the M-wave first and second phases, and the peak twitch force were measured from the knee extensors...
February 22, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28227969/effects-of-lower-limb-electrical-stimulation-on-trunk-stability-in-persons-with-sci-during-walking-a-case-series
#5
Kamyar Momeni, Stephen Canton, Arvind Ramanujam, Erica Garbarini, Gail F Forrest, Kamyar Momeni, Stephen Canton, Arvind Ramanujam, Erica Garbarini, Gail F Forrest, Arvind Ramanujam, Gail F Forrest, Kamyar Momeni, Stephen Canton, Erica Garbarini
The purpose of the present case series was to investigate whether three lower limb rehabilitation training approaches have any effects on trunk stability of persons with motor complete SCI during a 10-minute assisted walk. These trainings included electrical stimulation (ES), standing retraining (SRT), and a novel multi-modality approach that combined ES with SRT. We observed that multi-muscle ES directed at the lower limbs had a prominent, indirect effect on the upper and lower muscles of the trunk. More specifically, trunk muscle activations of the ES+SRT subject increased after training for the more distal muscles of the trunk...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227902/impairment-of-muscle-force-transmission-in-spastic-paretic-muscles-of-stroke-survivors
#6
Xiaogang Hu, Babak Afsharipour, William Zev Rymer, Nina L Suresh, Xiaogang Hu, Babak Afsharipour, William Zev Rymer, Nina L Suresh, Xiaogang Hu, Babak Afsharipour, William Zev Rymer, Nina L Suresh
Hemispheric stroke survivors tend to have persistent motor impairments, with muscle weakness and muscle spasticity observed concurrently in the affected muscles. The objective of this preliminary study was to identify whether impairment of muscle force transmission could contribute to weakness in spastic-paretic muscles of chronic stroke survivors. To characterize the efficiency of the transmission of muscle forces to the tendon, we activated biceps brachii muscle electrically by stimulating the musculocutaneous nerve with maximum current...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227184/neuromotor-response-of-the-leg-muscles-following-a-supine-stand-retraining-with-without-neuromuscular-electrical-stimulation-training-intervention-for-individuals-with-sci-a-case-series
#7
Stephen Canton, Kamyar Momeni, Arvind Ramanujam, Erica Garbarini, Gail F Forrest, Stephen Canton, Kamyar Momeni, Arvind Ramanujam, Erica Garbarini, Gail F Forrest, Arvind Ramanujam, Gail F Forrest, Stephen Canton, Kamyar Momeni, Erica Garbarini
The goal of this paper is to study the effects of supine and stand retraining (SRT) interventions with and without multi muscle neuromuscular electrical stimulation (NMES) on the neuromuscular EMG responses of the leg muscles for individuals with motor complete SCI during walking on a body-weight support (BWS) treadmill. The main outcome variables were EMG amplitude, integrated EMG and co-contraction indices (co-excitation and co-activation) collected during a 10-minute walking treadmill trial. Data was analyzed for the first, fifth and tenth minute of walking...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227179/influence-of-electrode-configuration-on-the-electric-field-distribution-during-transcutaneous-spinal-direct-current-stimulation-of-the-cervical-spine
#8
Sofia R Fernandes, Ricardo Salvador, Cornelia Wenger, Mamede A de Carvalho, Pedro C Miranda, Sofia R Fernandes, Ricardo Salvador, Cornelia Wenger, Mamede A de Carvalho, Pedro C Miranda, Sofia R Fernandes, Pedro C Miranda, Cornelia Wenger, Ricardo Salvador, Mamede A de Carvalho
Transcutaneous spinal direct current stimulation (tsDCS) is a recent technique with promising neuromodulatory effects on spinal neuronal circuitry. The main objective of the present study was to perform a finite element analysis of the electric field distribution in tsDCS in the cervical spine region, with varying electrode configurations and geometry. A computational model of a human trunk was generated with nine tissue meshes. Three electrode configurations were tested: A) rectangular saline-soaked sponge target and return electrodes placed over C3 and T3 spinous processes, respectively; B1) circular saline-soaked sponge target and return electrodes placed over C7 spinous process and right deltoid muscle, respectively; B2) same configuration as B1, considering circular shaped electrodes with sponge and rubber layers and a small circular connector on the top surface...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226857/development-of-a-closed-loop-system-for-tremor-suppression-in-patients-with-parkinson-s-disease
#9
F L Xu, M Z Hao, S Q Xu, Z X Hu, Q Xiao, N Lan, F L Xu, M Z Hao, S Q Xu, Z X Hu, Q Xiao, N Lan, S Q Xu, Z X Hu, Q Xiao, M Z Hao, N Lan, F L Xu
More than 70% of patients suffering Parkinson's disease (PD) exhibit resting tremor in their extremities, hampering their ability to perform daily activities. Based on our earlier studies on corticospinal transmission of tremor signals [10,11], we hypothesize that cutaneous afferents evoked by surface stimulation can produce an inhibitory effect on propriospinal neurons (PN), which in turn will suppress tremor signals passing through the PN. This paper presents the development of a closed-loop system for tremor suppression by transcutaneous electrical nerve stimulation (TENS) of sensory fibers beneath the skin...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226850/the-effect-of-inter-electrode-distance-on-the-electric-field-distribution-during-transcutaneous-lumbar-spinal-cord-direct-current-stimulation
#10
Rui Bastos, Sofia R Fernandes, Ricardo Salvador, Cornelia Wenger, Mamede A de Carvalho, Pedro C Miranda, Rui Bastos, Sofia R Fernandes, Ricardo Salvador, Cornelia Wenger, Mamede A de Carvalho, Pedro C Miranda, Pedro C Miranda, Rui Bastos, Cornelia Wenger, Ricardo Salvador, Mamede A de Carvalho, Sofia R Fernandes
Previous studies have indicated potential neuromodulation of the spinal circuitry by transcutaneous spinal direct current stimulation (tsDCS), such as changes in motor unit recruitment, shortening of the peripheral silent period and interference with supraspinal input to lower motor neurons. All of these effects were dependent on the polarity of the electrodes. The present study investigates how the distance between the electrodes during tsDCS influences the electric field's (E-field) spatial distribution in the lumbar and sacral spinal cord (SC)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226845/validation-of-empirical-mode-decomposition-combined-with-notch-filtering-to-extract-electrical-stimulation-artifact-from-surface-electromyograms-during-functional-electrical-stimulation
#11
Rakesh Pilkar, Arvind Ramanujam, Erica Garbarini, Gail Forrest, Rakesh Pilkar, Arvind Ramanujam, Erica Garbarini, Gail Forrest, Rakesh Pilkar, Erica Garbarini, Arvind Ramanujam, Gail Forrest
This paper presents the validity of Empirical Mode Decomposition (EMD) combined with Notch filtering to remove the electrical stimulation (ES) artifact from surface electromyogram (EMG) data for interpretation of muscle responses during Functional Electrical Stimulation (FES) experiments. We hypothesized that the EMD algorithm provides a suitable platform for decomposing the EMG signal into physically meaningful intrinsic mode functions (IMFs) which can be further used to isolate electrical stimulation (ES) artifact...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226842/controlling-interfered-area-in-interferential-current-stimulation-by-electrode-area-patterning
#12
S Bounyong, S Adachi, T Yoshimoto, T Ota, J Ozawa, S Bounyong, S Adachi, T Yoshimoto, T Ota, J Ozawa, T Yoshimoto, T Ota, S Bounyong, J Ozawa, S Adachi
Interferential current therapy is a noninvasive therapy using simultaneously two or more medium-frequency currents passing through tissue. By controlling the interfered area of the current flows, selective stimulation is possible in target muscles, including deep muscles. However, controlling the interfered area or the intensity of the current precisely is still lacking. Using simulations based on a biological model of the thigh as well as electrical muscle stimulation (EMS) experiments, we investigated the influence of electrode area ratio in changing the interfered area of the currents...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226835/analysis-of-muscle-synergy-for-evaluation-of-task-specific-performance-in-stroke-patients
#13
Si Li, Cheng Zhuang, Xiao Zhang, Chuanxin M Niu, Qing Xie, Ning Lan, Si Li, Cheng Zhuang, Xiao Zhang, Chuanxin M Niu, Qing Xie, Ning Lan, Chuanxin M Niu, Xiao Zhang, Cheng Zhuang, Si Li, Ning Lan, Qing Xie
Muscle synergy represents a central neural module that organizes and activates a group of muscles when performing a certain task. However, whether muscle synergy is a good physiological indicator of motor ability in task performance for patients suffering stroke is not clear. The purpose of this study is to understand how information of task-specific muscle synergy in healthy subjects and patients post stroke can be used to evaluate their motor ability, and further to assist motor rehabilitation for stroke patients...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226834/a-survey-on-the-feasibility-of-surface-emg-in-facial-pacing
#14
Ville Rantanen, Mirja Ilves, Antti Vehkaoja, Anton Kontunen, Jani Lylykangas, Eeva Makela, Markus Rautiainen, Veikko Surakka, Jukka Lekkala, Ville Rantanen, Mirja Ilves, Antti Vehkaoja, Anton Kontunen, Jani Lylykangas, Eeva Makela, Markus Rautiainen, Veikko Surakka, Jukka Lekkala, Veikko Surakka, Jukka Lekkala, Mirja Ilves, Markus Rautiainen, Anton Kontunen, Antti Vehkaoja, Jani Lylykangas, Ville Rantanen, Eeva Makela
A survey on the feasibility of surface electromyography (EMG) measurements in facial pacing is presented. Pacing for unilateral facial paralysis consists of the measurement of activity from the healthy side of the face and functional electrical stimulation to reanimate the paralyzed one. The goal of this study is to evaluate the feasibility of surface EMG as a measurement method to detect muscle activations and to determine their intensities. Prior work is discussed, and results from experiments where 12 participants carried out a set of facial movements are presented...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226641/detection-of-myasthenia-gravis-using-electrooculography-signals
#15
T Liang, M I Boulos, B J Murray, S Krishnan, H Katzberg, K Umapathy, T Liang, M I Boulos, B J Murray, S Krishnan, H Katzberg, K Umapathy, M I Boulos, K Umapathy, H Katzberg, S Krishnan, T Liang, B J Murray
Myasthenia gravis (MG) is an autoimmune neuromuscular disorder resulting from skeletal muscle weakness and fatigue. An early common symptom is fatigable weakness of the extrinsic ocular muscles; if symptoms remain confined to the ocular muscles after a few years, this is classified as ocular myasthenia gravis (OMG). Diagnosis of MG when there are mild, isolated ocular symptoms can be difficult, and currently available diagnostic techniques are insensitive, non-specific or technically cumbersome. In addition, there are no accurate biomarkers to follow severity of ocular dysfunction in MG over time...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226453/spatial-characterization-of-innervation-zones-under-electrically-elicited-m-wave
#16
C Zhang, Y Peng, S Li, P Zhou, A Munoz, D Tang, Y Zhang, C Zhang, Y Peng, S Li, P Zhou, A Munoz, D Tang, Y Zhang, C Zhang, P Zhou, D Tang, Y Zhang, S Li, A Munoz, Y Peng
The three dimensional (3D) innervation zone (IZ) imaging approach (3DIZI) has been developed in our group to localize the IZ of a particular motor unit (MU) from its motor unit action potentials decomposed from high-density surface electromyography (EMG) recordings. In this study, the developed 3DIZI approach was combined with electrical stimulation to investigate global distributions of IZs in muscles from electrically elicited M-wave recordings. Electrical stimulations were applied to the musculocutaneous nerve to activate supramaximal muscle response of the biceps brachii in one healthy subject, and high-density (128 channels) surface EMG signals of the biceps brachii muscles were recorded...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28223939/no-influence-of-transcutaneous-electrical-nerve-stimulation-on-exercise-induced-pain-and-5-km-cycling-time-trial-performance
#17
Andrew W Hibbert, François Billaut, Matthew C Varley, Remco C J Polman
Introduction: Afferent information from exercising muscle contributes to the sensation of exercise-induced muscle pain. Transcutaneous electrical nerve stimulation (TENS) delivers low-voltage electrical currents to the skin, inhibiting nociceptive afferent information. The use of TENS in reducing perceptions of exercise-induced pain has not yet been fully explored. This study aimed to investigate the effect of TENS on exercise-induced muscle pain, pacing strategy, and performance during a 5-km cycling time trial (TT)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28223914/decoding-lower-limb-muscle-activity-and-kinematics-from-cortical-neural-spike-trains-during-monkey-performing-stand-and-squat-movements
#18
Xuan Ma, Chaolin Ma, Jian Huang, Peng Zhang, Jiang Xu, Jiping He
Extensive literatures have shown approaches for decoding upper limb kinematics or muscle activity using multichannel cortical spike recordings toward brain machine interface (BMI) applications. However, similar topics regarding lower limb remain relatively scarce. We previously reported a system for training monkeys to perform visually guided stand and squat tasks. The current study, as a follow-up extension, investigates whether lower limb kinematics and muscle activity characterized by electromyography (EMG) signals during monkey performing stand/squat movements can be accurately decoded from neural spike trains in primary motor cortex (M1)...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28222553/dual-afferent-sensory-input-training-for-voluntary-movement-after-stroke-a-pilot-randomized-controlled-study
#19
Seahyun Bae, Kyung-Yoon Kim
BACKGROUND: Stimulation through afferent sensory input is necessary to improve voluntary functional movement in stroke patients. OBJECTIVES: Dual-afferent sensory input, which combines electromyography-triggered functional electric stimulation (ETFES) and action observation, was investigated to determine its effects on voluntary movements in stroke patients. METHODS: This study was conducted on 18 patients with left hemiplegia diagnosed between 6 and 24 months prior...
February 8, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28219984/motor-neurons-tune-premotor-activity-in-a-vertebrate-central-pattern-generator
#20
Kristy J Lawton, Wick M Perry, Ayako Yamaguchi, Erik Zornik
Central patterns generators (CPGs) are neural circuits that drive rhythmic motor output without sensory feedback. Vertebrate CPGs are generally believed to operate in a top-down manner in which premotor interneurons activate motor neurons that in turn drive muscles. In contrast, the frog (Xenopus laevis) vocal CPG contains a functionally unexplored neuronal projection from the motor nucleus to the premotor nucleus, indicating a recurrent pathway that may contribute to rhythm generation. In this study we characterized the function of this bottom-up connection...
February 20, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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