keyword
MENU ▼
Read by QxMD icon Read
search

myoelectric

keyword
https://www.readbyqxmd.com/read/29760645/systems-analysis-of-human-visuo-myoelectric-control-facilitated-by-anodal-transcranial-direct-current-stimulation-in-healthy-humans
#1
Vinh Kha, Aguida S Foerster, Susan Bennett, Michael A Nitsche, Filip Stefanovic, Anirban Dutta
Induction of neuroplasticity by transcranial direct current stimulation (tDCS) applied to the primary motor cortex facilitates motor learning of the upper extremities in healthy humans. The impact of tDCS on lower limb functions has not been studied extensively so far. In this study, we applied a system identification approach to investigate the impact of anodal transcranial direct current stimulation of the leg area of the motor cortex via the human visuo-myoelectric controller. The visuo-myoelectric reaching task (VMT) involves ballistic muscle contraction after a visual cue...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29756458/evaluation-of-the-effects-of-adding-vibrotactile-feedback-to-myoelectric-prosthesis-users-on-performance-and-visual-attention-in-a-dual-task-paradigm
#2
Eitan Raveh, Jason Friedman, Sigal Portnoy
OBJECTIVE: To evaluate the effects of adding vibrotactile feedback to myoelectric prosthesis users on the performance time and visual attention in a dual-task paradigm. DESIGN: A repeated-measures design with a counterbalanced order of two conditions. SETTING: Laboratory setting. SUBJECTS: Transradial amputees using a myoelectric prosthesis with normal or corrected eyesight ( N = 12, median age = 65 ± 13 years)...
May 1, 2018: Clinical Rehabilitation
https://www.readbyqxmd.com/read/29752241/upper-limb-prosthesis-control-for-high-level-amputees-via-myoelectric-recognition-of-leg-gestures
#3
Kenneth R Lyons, Sanjay S Joshi
Recognition of motion intent via surface electromyography (EMG) has become increasingly practical for prosthesis control, but lacking residual muscle sites remains a major obstacle to its use by high-level amputees. Currently, there are few approaches to upper limb prosthesis control for individuals with amputations proximal to the elbow, all of which suffer from one or more of three primary problems: invasiveness, the need for intensive training, and lacking functionality. Using surface EMG sensors placed on the lower leg and a natural mapping between degrees of freedom of the leg and the arm, we tested a noninvasive control approach by which high-level amputees could control prosthetic elbow, wrist, and hand movements with minimal training...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752240/evaluating-internal-model-strength-and-performance-of-myoelectric-prosthesis-control-strategies
#4
Ahmed W Shehata, Erik J Scheme, Jonathon W Sensinger
On-going developments in myoelectric prosthesis control have provided prosthesis users with an assortment of control strategies that vary in reliability and performance. Many studies have focused on improving performance by providing feedback to the user but have overlooked the effect of this feedback on internal model development, which is key to improve long-term performance. In this paper, the strength of internal models developed for two commonly used myoelectric control strategies: raw control with raw feedback (using a regression-based approach) and filtered control with filtered feedback (using a classifier-based approach), were evaluated using two psychometric measures: trial-by-trial adaptation and just-noticeable difference...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29747672/two-ways-to-improve-myoelectric-control-for-a-transhumeral-amputee-after-targeted-muscle-reinnervation-a-case-study
#5
Yang Xu, Dingguo Zhang, Yang Wang, Juntao Feng, Wendong Xu
BACKGROUND: Myoelectric control of multifunctional prostheses is challenging for individuals with high-level amputations due to insufficient surface electromyography (sEMG) signals. A surgical technique called targeted muscle reinnervation (TMR) has achieved impressive improvements in myoelectric control by providing more sEMG control signals. In this case, some channels of sEMG signals are coupled after TMR, which limits the performance of conventional amplitude-based control for upper-limb prostheses...
May 10, 2018: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29746845/detection-of-stress-and-the-effects-of-central-nervous-system-depressants-by-gastrointestinal-smooth-muscle-electromyography-in-wakeful-rats
#6
K F Szűcs, G Grosz, M Süle, A Sztojkov-Ivanov, E Ducza, A Márki, A Kothencz, L Balogh, R Gáspár
AIMS: The altered gut-brain interaction can be in the background of functional gastrointestinal (GI) disorders. In the GI tract, the slow-wave myoelectric signals can be detected by electromyography (EMG). The aims of our study were to follow up the stress induced alteration in the GI tract by smooth muscle EMG in wakeful rats. MAIN METHODS: The GI tract myoelectric activity of male rats was measured by an electrode pair under the abdominal skin, the responses were detected and analyzed by a software using fast Fourier transformation...
May 7, 2018: Life Sciences
https://www.readbyqxmd.com/read/29745434/efficacy-of-needleless-transcutaneous-electroacupuncture-in-synchronization-with-breathing-for-symptomatic-idiopathic-gastroparesis-a-blinded-and-controlled-acute-treatment-trial
#7
G Song, Y Sun, M Bashashati, A Quezada, S Sigaroodi, I Sarosiek, J D Z Chen, R W McCallum
BACKGROUND: Needleless transcutaneous electroacupuncture (TEA) improves nausea and myoelectrical activity in diabetic gastroparesis (GP). Synchronized TEA (STEA), which combines synchronized breathing with TEA, is more potent than TEA in enhancing vagal activity in healthy subjects. AIMS: To investigate whether STEA improves symptoms, electrogastrogram (EGG) and vagal activity in idiopathic gastroparesis (IGP). METHODS: Eighteen IGP subjects underwent 2 randomized visits (sham at non-acupoints or real STEA at acupoints) consisted of a 30-minute baseline, an Ensure challenge to provoke nausea, followed by 60-minute treatment with sham or real STEA, and 15-minute observation period...
May 10, 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29736693/feasibility-testing-of-hydrophobic-carbon-electrodes-for-acquisition-of-underwater-surface-electromyography-data
#8
Hugo Posada-Quintero, Yeonsik Noh, Caitlin Eaton-Robb, John P Florian, Ki H Chon
Underwater surface electromyography (sEMG) signals are especially of interest for rehabilitation and sports medicine applications. Silver/silver chloride (Ag/AgCl) hydrogel electrodes, although the gold standard for sEMG data collection, require waterproofing for underwater applications. Having to apply waterproof tape over electrodes impedes the deployment of sEMG in immersed conditions. As a better alternative for underwater applications, we have developed carbon black/polydimethylsiloxane (CB/PDMS) electrodes for collecting sEMG signals under water...
May 7, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29736393/relationship-between-isometric-muscle-force-and-fractal-dimension-of-surface-electromyogram
#9
Matteo Beretta-Piccoli, Gennaro Boccia, Tessa Ponti, Ron Clijsen, Marco Barbero, Corrado Cescon
The relationship between fractal dimension of the surface electromyogram (sEMG) and the intensity of muscle contraction is still controversial in simulated and experimental conditions. To support the use of fractal analysis to investigate myoelectric fatigue, it is crucial to establish the interdependence between fractal dimension and muscle contraction intensity. We analyzed the behavior of fractal dimension, conduction velocity, mean frequency, and average rectified value in twenty-eight volunteers at nine levels of isometric force...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29723994/virtual-sensor-of-surface-electromyography-in-a-new-extensive-fault-tolerant-classification-system
#10
Karina de O A de Moura, Alexandre Balbinot
A few prosthetic control systems in the scientific literature obtain pattern recognition algorithms adapted to changes that occur in the myoelectric signal over time and, frequently, such systems are not natural and intuitive. These are some of the several challenges for myoelectric prostheses for everyday use. The concept of the virtual sensor, which has as its fundamental objective to estimate unavailable measures based on other available measures, is being used in other fields of research. The virtual sensor technique applied to surface electromyography can help to minimize these problems, typically related to the degradation of the myoelectric signal that usually leads to a decrease in the classification accuracy of the movements characterized by computational intelligent systems...
May 1, 2018: Sensors
https://www.readbyqxmd.com/read/29708873/simple-gastric-motility-assessment-method-with-a-single-channel-electrogastrogram
#11
Nenad B Popović, Nadica Miljković, Mirjana B Popović
Surface electrogastrography (EGG) is a non-invasive technique that is used to record myoelectrical activity of the stomach using cutaneous electrodes placed on the abdomen. Gastric motility assessment by EGG is a candidate for standard clinical procedure based on the quantification of parameters characteristic of gastric motility disorders. Despite its noticeable benefits, EGG is not widely implemented in clinical practice. The main reasons are: (1) lack of standardization of electrode placement, (2) time-consuming diagnostic procedures and (3) a complex multi-channel recording setup...
April 30, 2018: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29699891/electrohysterographic-characterization-of-the-uterine-myoelectrical-response-to-labor-induction-drugs
#12
Carlos Benalcazar-Parra, Yiyao Ye-Lin, Javier Garcia-Casado, Rogelio Monfort-Orti, Jose Alberola-Rubio, Alfredo Perales, Gema Prats-Boluda
Labor induction is a common practice to promote uterine contractions and labor onset. Uterine electrohysterogram (EHG) has proved its suitability for characterizing the uterus electrophysiological condition in women with spontaneous labor. The aim of this study was to characterize and compare uterine myoelectrical activity during the first 4 h in response to labor induction drugs, Misoprostol (G1) and Dinoprostone (G2), by analyzing the differences between women who achieved active phase of labor and those who did not (successful and failed inductions)...
April 23, 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29692718/human-s-capability-to-discriminate-spatial-forces-at-the-big-toe
#13
Annette Hagengruber, Hannes Höppner, Jörn Vogel
A key factor for reliable object manipulation is the tactile information provided by the skin of our hands. As this sensory information is so essential in our daily life it should also be provided during teleoperation of robotic devices or in the control of myoelectric prostheses. It is well-known that feeding back the tactile information to the user can lead to a more natural and intuitive control of robotic devices. However, in some applications it is difficult to use the hands as natural feedback channels since they may already be overloaded with other tasks or, e...
2018: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29667248/establishment-of-a-radiotelemetric-recording-technique-in-mice-to-investigate-gastric-slow-waves-modulatory-role-of-putative-neurotransmitter-systems
#14
Huichuan Wang, Zengbing Lu, Yuen Hang Liu, Yayi Sun, Longlong Tu, Man P Ngan, Chi-Kong Yeung, John A Rudd
NEW FINDINGS: What is the central question of this study? Gastric slow waves originating from interstitial cells of Cajal-smooth muscle syncytium are usually studied in culture or in tissue segments, but no studies have made recording of slow waves from conscious freely moving mice. Can radiotelemetry be used to record slow waves, and do they respond predictably to drug treatment? What is the main finding and its importance? Radiotelemetry may be used to record slow waves from conscious freely moving mice permitting an examination of drug action in vivo, which is critical to drug discovery projects characterizing drugs and metabolites on gastrointestinal function...
April 18, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29644797/altered-gastrointestinal-motility-involving-autoantibodies-in-the-experimental-autoimmune-encephalomyelitis-model-of-multiple-sclerosis
#15
E T Spear, E A Holt, E J Joyce, M M Haag, S M Mawe, G W Hennig, B Lavoie, A M Applebee, C Teuscher, G M Mawe
BACKGROUND: Multiple sclerosis (MS) is an autoimmune disease of the central nervous system that, in addition to motor, sensory, and cognitive symptoms, also causes constipation, which is poorly understood. Here, we characterize gastrointestinal (GI) dysmotility in the experimental autoimmune encephalomyelitis (EAE) mouse model of MS and evaluate whether autoantibodies target the enteric nervous system (ENS) and cause dysmotility. METHODS: EAE was induced in male SJL and B6 mice...
April 11, 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29643774/corrigendum-the-reality-of-myoelectric-prostheses-understanding-what-makes-these-devices-difficult-for-some-users-to-control
#16
Alix Chadwell, Laurence Kenney, Sibylle Thies, Adam Galpin, John Head
[This corrects the article on p. 7 in vol. 10, PMID: 27597823.].
2018: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29628911/estimation-of-muscle-force-based-on-neural-drive-in-a-hemispheric-stroke-survivor
#17
Chenyun Dai, Yang Zheng, Xiaogang Hu
Robotic assistant-based therapy holds great promise to improve the functional recovery of stroke survivors. Numerous neural-machine interface techniques have been used to decode the intended movement to control robotic systems for rehabilitation therapies. In this case report, we tested the feasibility of estimating finger extensor muscle forces of a stroke survivor, based on the decoded descending neural drive through population motoneuron discharge timings. Motoneuron discharge events were obtained by decomposing high-density surface electromyogram (sEMG) signals of the finger extensor muscle...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29616149/immersive-virtual-reality-therapy-with-myoelectric-control-for-treatment-resistant-phantom-limb-pain-case-report
#18
Brian Chau, Ivan Phelan, Phillip Ta, Sarah Humbert, Justin Hata, Duc Tran
Objective: Phantom limb pain is a condition frequently experienced after amputation. One treatment for phantom limb pain is traditional mirror therapy, yet some patients do not respond to this intervention, and immersive virtual reality mirror therapy offers some potential advantages. We report the case of a patient with severe phantom limb pain following an upper limb amputation and successful treatment with therapy in a custom virtual reality environment. Methods: An interactive 3-D kitchen environment was developed based on the principles of mirror therapy to allow for control of virtual hands while wearing a motion-tracked, head-mounted virtual reality display...
July 2017: Innovations in Clinical Neuroscience
https://www.readbyqxmd.com/read/29615956/initial-clinical-evaluation-of-the-modular-prosthetic-limb
#19
Briana N Perry, Courtney W Moran, Robert S Armiger, Paul F Pasquina, Jamie W Vandersea, Jack W Tsao
The Modular Prosthetic Limb (MPL) was examined for its feasibility and usability as an advanced, dexterous upper extremity prosthesis with surface electromyography (sEMG) control in with two individuals with below-elbow amputations. Compared to currently marketed prostheses, the MPL has a greater number of sequential and simultaneous degrees of motion, as well as wrist modularity, haptic feedback, and individual digit control. The MPL was successfully fit to a 33-year-old with a trans-radial amputation (TR01) and a 30-year-old with a wrist disarticulation amputation (TR02)...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29580245/the-clinical-relevance-of-advanced-artificial-feedback-in-the-control-of-a-multi-functional-myoelectric-prosthesis
#20
Marko Markovic, Meike A Schweisfurth, Leonard F Engels, Tashina Bentz, Daniela Wüstefeld, Dario Farina, Strahinja Dosen
BACKGROUND: To effectively replace the human hand, a prosthesis should seamlessly respond to user intentions but also convey sensory information back to the user. Restoration of sensory feedback is rated highly by the prosthesis users, and feedback is critical for grasping in able-bodied subjects. Nonetheless, the benefits of feedback in prosthetics are still debated. The lack of consensus is likely due to the complex nature of sensory feedback during prosthesis control, so that its effectiveness depends on multiple factors (e...
March 27, 2018: Journal of Neuroengineering and Rehabilitation
keyword
keyword
74597
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"