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https://www.readbyqxmd.com/read/29168769/early-detection-of-the-initiation-of-sit-to-stand-posture-transitions-using-orthosis-mounted-sensors
#1
Abul Doulah, Xiangrong Shen, Edward Sazonov
Assistance during sit-to-stand (SiSt) transitions for frail elderly may be provided by powered orthotic devices. The control of the powered orthosis may be performed by the means of electromyography (EMG), which requires direct contact of measurement electrodes to the skin. The purpose of this study was to determine if a non-EMG-based method that uses inertial sensors placed at different positions on the orthosis, and a lightweight pattern recognition algorithm may accurately identify SiSt transitions without false positives...
November 23, 2017: Sensors
https://www.readbyqxmd.com/read/29167637/variations-in-static-force-control-and-motor-unit-behavior-with-error-amplification-feedback-in-the-elderly
#2
Yi-Ching Chen, Linda L Lin, Yen-Ting Lin, Chia-Ling Hu, Ing-Shiou Hwang
Error amplification (EA) feedback is a promising approach to advance visuomotor skill. As error detection and visuomotor processing at short time scales decline with age, this study examined whether older adults could benefit from EA feedback that included higher-frequency information to guide a force-tracking task. Fourteen young and 14 older adults performed low-level static isometric force-tracking with visual guidance of typical visual feedback and EA feedback containing augmented high-frequency errors...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29166377/the-effect-of-body-position-on-esophageal-reflexes-in-cats-a-possible-mechanism-of-sids
#3
Ivan M Lang, Bidyut K Medda, Reza Shaker, Sudarshan Jadcherla
BACKGROUND: It has been hypothesized that life threatening events are caused by supra-esophageal reflux (SER) of gastric contents which activates laryngeal chemoreflex-stimulated apnea. Placing infants supine decreases the risk of sudden infant death syndrome (SIDS). The aim of this study was to determine whether body position affects esophageal reflexes that control SER. METHODS: We instrumented the pharyngeal and esophageal muscles of decerebrate cats (N=14) to record EMG or manometry, and investigated the effects of body position on the esophago-upper esophageal sphincter (UES) contractile reflex (EUCR), esophago-UES relaxation reflex (EURR), esophagus-stimulated pharyngeal swallow response (EPSR), secondary peristalsis (SP), and pharyngeal swallow (PS)...
November 22, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29165059/influence-of-type-of-mvc-test-on-electromyography-measures-of-biceps-brachii-and-triceps-brachii
#4
Danuta Roman-Liu, Paweł Bartuzi
OBJECTIVE: This study aimed to investigate the amplitude and frequency measures of the electromyography (EMG) signal in agonistic and antagonistic muscles (biceps brachii, triceps brachii). METHODS: Fifteen males (22.9 ± 2.1 years old) took three isometric maximum voluntary contraction (MVC) tests. Two tests were typical MVC tests for biceps brachii and triceps brachii. The third was a test often used to obtain MVC for forearm muscles (arm and forearm hanging down)...
November 22, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/29164285/referent-control-of-the-orientation-of-posture-and-movement-in-the-gravitational-field
#5
Aditi A Mullick, Nicolas A Turpin, Szu-Chen Hsu, Sandeep K Subramanian, Anatol G Feldman, Mindy F Levin
This study addresses the question of how posture and movement are oriented with respect to the direction of gravity. It is suggested that neural control levels coordinate spatial thresholds at which multiple muscles begin to be activated to specify a referent body orientation (RO) at which muscle activity is minimized. Under the influence of gravity, the body is deflected from the RO to an actual orientation (AO) until the emerging muscle activity and forces begin to balance gravitational forces and maintain body stability...
November 21, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/29164228/emg-driven-forward-dynamics-simulation-to-estimate-in-vivo-joint-contact-forces-during-normal-smooth-and-bouncy-gait
#6
Swithin Razu, Trent M Guess
This study leveraged data from the "Sixth Grand Challenge Competition to Predict in Vivo Knee Loads" to create a full-body musculoskeletal model that incorporates subject specific geometries of the right leg in order to concurrently predict knee contact forces, ligament forces, muscle forces, and ground contact forces. The objectives of this paper are twofold: First, to describe an electromyography (EMG)-driven modeling methodology to predict knee contact forces, and second to validate model predictions by evaluating the model predictions against known values for a patient with an instrumented total knee replacement (TKR) for three distinctly different gait styles (normal, smooth, and bouncy gait)...
November 21, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29163340/the-dominant-subthalamic-nucleus-phenomenon-in-bilateral-deep-brain-stimulation-for-parkinson-s-disease-evidence-from-a-gait-analysis-study
#7
Mario Giorgio Rizzone, Maurizio Ferrarin, Michele Maria Lanotte, Leonardo Lopiano, Ilaria Carpinella
Background: It has been suggested that parkinsonian [Parkinson's disease (PD)] patients might have a "dominant" (DOM) subthalamic nucleus (STN), whose unilateral electrical stimulation [deep brain stimulation (DBS)] could lead to an improvement in PD symptoms similar to bilateral STN-DBS. Objectives: Since disability in PD patients is often related to gait problems, in this study, we wanted to investigate in a group of patients bilaterally implanted for STN-DBS: (1) if it was possible to identify a subgroup of subjects with a dominant STN; (2) in the case, if the unilateral stimulation of the dominant STN was capable to improve gait abnormalities, as assessed by instrumented multifactorial gait analysis, similarly to what observed with bilateral stimulation...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29161172/development-of-an-attachable-endoscopic-nerve-stimulator-for-intraoperative-neuromonitoring-during-endoscopic-or-robotic-thyroidectomy
#8
Eui-Suk Sung, Jin-Choon Lee, Seok Hyun Kim, Sung-Chan Shin, Da-Woon Jung, Byung-Joo Lee
We developed a simple attachable endoscopic nerve stimulator that can be connected to monopolar cauterization surgical instruments. This study on porcine models aimed to investigate the feasibility and efficacy of an attachable endoscopic nerve stimulator for intraoperative neuromonitoring (IONM) before application in humans. We evaluated the electromyography (EMG) amplitudes of 8 recurrent laryngeal nerves in 4 pigs with a conventional nerve probe and the attachable endoscopic nerve stimulator. The attachable endoscopic nerve stimulator was feasible and safe in all cases...
November 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29158954/the-relationship-between-segmental-rolling-ability-and-lumbar-multifidus-activation-time
#9
Nicole Clark, Michael L Voight, Ashley M Campbell, Sherry Pierce, Pat Sells, Ryan Cook, Clint Henley, Lindsey Schiller
Background: Segmental rolling has been utilized as an assessment and intervention tool to identify and affect dysfunction of the upper quarter, core, and lower quarter. One theory to explain dysfunctional segmental rolling is a lack of segmental spinal control / stabilization. Faulty muscle firing sequencing has been related to poor spinal stability, however to date, no assessment tool exists to evaluate a patient's motor coordination of local and global musculature. Purpose: The purpose of this study was to assess the temporal sequence of lumbar multifidus activation associated with anterior deltoid activation, and to determine if faulty sequencing was associated with the inability to segmentally roll in subjects without mobility restrictions...
November 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29158671/correlation-and-compatibility-between-surface-respiratory-electromyography-and-transesophageal-diaphragmatic-electromyography-measurements-during-treadmill-exercise-in-stable-patients-with-copd
#10
Weiliang Wu, Lili Guan, Xiaoying Li, Lin Lin, Bingpeng Guo, Yuqiong Yang, Zhenyu Liang, Fengyan Wang, Luqian Zhou, Rongchang Chen
Purpose: To evaluate the compatibility and correlation between noninvasive surface respiratory electromyography and invasive transesophageal diaphragmatic electromyography measurements as facilitating indicators of neural respiratory drive (NRD) evaluation during treadmill exercise. Patients and methods: Transesophageal diaphragmatic electromyogram activity (EMGdi,es) and surface inspiratory electromyogram (EMG) activity, including surface diaphragmatic EMG activity (EMGdi,sur), surface parasternal intercostal muscle EMG activity (EMGpara), and surface sternocleidomastoid EMG activity (EMGsc), were detected simultaneously during increasing exercise capacity in 20 stable patients with COPD...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29156324/influence-of-post-stroke-spasticity-on-emg-force-coupling-and-force-steadiness-in-biceps-brachii
#11
Jennilee K Carlyle, George Mochizuki
BACKGROUND: Individuals with spasticity after stroke experience a decrease in force steadiness which can impact function. Alterations in the strength of EMG-force coupling may contribute to the reduction in force steadiness observed in spasticity. The aim was to determine the extent to which force steadiness and EMG-force coupling is affected by post-stroke spasticity. METHODS: This cross-sectional study involved individuals with upper limb spasticity after stroke...
November 13, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29156320/localised-sampling-of-myoelectric-activity-may-provide-biased-estimates-of-cocontraction-for-gastrocnemius-though-not-for-soleus-and-tibialis-anterior-muscles
#12
Maria Vinti, Jean-Michel Gracies, Marco Gazzoni, Taian Vieira
Proper muscle activity quantification is highly relevant to monitor and treat spastic cocontraction. As activity may distribute unevenly within muscle volumes, particularly for pennate calf muscles, surface electromyograms (EMGs) detected by traditional bipolar montage may provide biased estimations of muscle activity. We compared cocontraction estimates obtained using bipolar vs grids of electrodes (high-density EMG, HD-EMG). EMGs were collected from medial gastrocnemius, soleus and tibialis anterior during isometric plantar and dorsi-flexion efforts at three levels (30%, 70% and 100% MVC), knee flexed and extended...
November 14, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29150079/mechanism-hypotheses-for-the-electrophysiological-manifestations-of-two-cases-of-endplate-acetylcholinesterase-deficiency-related-congenital-myasthenic-syndrome
#13
Qingyun Ding, Dongchao Shen, Yi Dai, Youfang Hu, Yuzhou Guan, Mingsheng Liu, Liying Cui
OBJECTIVE: To summarize the electrophysiological characteristics of two cases of endplate acetylcholinesterase deficiency (EAD) related congenital myasthenic syndrome (CMS) caused by COLQ mutation and to discuss the possible mechanism of these electrophysiological phenomena. METHODS: Electrophysiological examinations were conducted including nerve conduction studies, routine electromyography (EMG), repetitive nerve stimulation (RNS) and single fiber EMG (SFEMG)...
November 14, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29145773/forced-use-of-the-paretic-leg-induced-by-a-constraint-force-applied-to-the-nonparetic-leg-in-individuals-poststroke-during-walking
#14
Chao-Jung Hsu, Janis Kim, Elliot J Roth, William Z Rymer, Ming Wu
BACKGROUND: Individuals with stroke usually show reduced muscle activities of the paretic leg and asymmetrical gait pattern during walking. OBJECTIVE: To determine whether applying a resistance force to the nonparetic leg would enhance the muscle activities of the paretic leg and improve the symmetry of spatiotemporal gait parameters in individuals with poststroke hemiparesis. METHODS: Fifteen individuals with chronic poststroke hemiparesis participated in this study...
November 1, 2017: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/29143379/region-dependent-hamstrings-activity-in-nordic-hamstring-exercise-and-stiff-leg-deadlift-defined-with-high-density-emg
#15
András Hegyi, Annamária Péter, Taija Finni, Neil J Cronin
Recent studies suggest region-specific metabolic activity in hamstring muscles during injury prevention exercises, but the neural representation of this phenomenon is unknown. The aim of this study was to examine whether regional differences are evident in the activity of biceps femoris long head (BFlh) and semitendinosus (ST) muscles during two common injury prevention exercises. Twelve male participants without a history of hamstring injury performed the Nordic hamstring exercise (NHE) and stiff-leg deadlift (SDL) while BFlh and ST activity were recorded with high-density electromyography (HD-EMG)...
November 15, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29142848/injury-of-the-external-branch-of-the-superior-laryngeal-nerve-in-thyroid-surgery
#16
REVIEW
Andre S Potenza, Vergilius J F Araujo Filho, Claudio R Cernea
The external branch of the superior laryngeal nerve (EBSLN) innervates the cricothyroid muscle (CTM) to promote lengthening and thinning of the vocal fold, thus increasing voice pitch. The close relation with the superior thyroid vessels (STV) puts the EBSLN in risk every time the superior pole of the thyroid is dissected. It travels downward to innervate the CTM, lateral to the thyroid cartilage and to the inferior pharyngeal constrictor muscle (IPCM), being eventually covered by this muscle fibers as it approaches its entry point...
October 2017: Gland Surgery
https://www.readbyqxmd.com/read/29142836/preoperative-intraoperative-and-postoperative-anesthetic-prospective-for-thyroid-surgery-what-s-new
#17
REVIEW
I-Cheng Lu, I-Hua Lin, Che-Wei Wu, Hsiu-Ya Chen, Yi-Chu Lin, Feng-Yu Chiang, Pi-Ying Chang
The aim of this review is to analyze what's new on anesthetic prospective to perioperative management for thyroid surgery. For recent decades intraoperative neuromonitoring (IONM) during thyroid and parathyroid surgery has obtained more and more popularity. New modality of anesthetic technique was also developed to incorporate into surgical teamwork. For example, the precise position of EMG tube and optimal use of neuromuscular blocking agents (NMBAs) play key roles in successful IONM system. Special focus is paid to following issues: (I) preoperative airway evaluation and pre-op preparation; (II) anesthetic managements including advanced intubation tools, NMBAs and sugammadex; and (III) post-op adverse events such as pain and postoperative nausea vomiting...
October 2017: Gland Surgery
https://www.readbyqxmd.com/read/29142835/trachway-video-intubating-stylet-allows-for-optimization-of-electromyographic-endotracheal-tube-placement-for-monitored-thyroidectomy
#18
Pi-Ying Chang, Pin-Yang Hu, Yi-Chu Lin, Hsiu-Ya Chen, Feng-Yu Chiang, Che-Wei Wu, Gianlorenzo Dionigi, I-Cheng Lu
Background: Endotracheal tube-based surface electrodes are now commonly applied to measure evoked electromyographic (EMG) response of the vocal cord during monitored thyroidectomy. The aim of the study was to determine the incidence of difficult intubation and to assess the effectiveness of using video-assisted intubating stylet (Trachway) for EMG tube placement in patients undergoing monitored thyroidectomy. Methods: Medical records were collected from consecutive patients undergoing thyroid surgery before and after implementation of the protocol...
October 2017: Gland Surgery
https://www.readbyqxmd.com/read/29142739/classification-of-amyotrophic-lateral-sclerosis-disease-based-on-convolutional-neural-network-and-reinforcement-sample-learning-algorithm
#19
Abdulkadir Sengur, Yaman Akbulut, Yanhui Guo, Varun Bajaj
Electromyogram (EMG) signals contain useful information of the neuromuscular diseases like amyotrophic lateral sclerosis (ALS). ALS is a well-known brain disease, which can progressively degenerate the motor neurons. In this paper, we propose a deep learning based method for efficient classification of ALS and normal EMG signals. Spectrogram, continuous wavelet transform (CWT), and smoothed pseudo Wigner-Ville distribution (SPWVD) have been employed for time-frequency (T-F) representation of EMG signals. A convolutional neural network is employed to classify these features...
December 2017: Health Information Science and Systems
https://www.readbyqxmd.com/read/29138687/analysis-of-the-biceps-brachii-muscle-by-varying-the-arm-movement-level-and-load-resistance-band
#20
Nuradebah Burhan, Mohammad 'Afif Kasno, Rozaimi Ghazali, Md Radzai Said, Shahrum Shah Abdullah, Mohd Hafiz Jali
Biceps brachii muscle illness is one of the common physical disabilities that requires rehabilitation exercises in order to build up the strength of the muscle after surgery. It is also important to monitor the condition of the muscle during the rehabilitation exercise through electromyography (EMG) signals. The purpose of this study was to analyse and investigate the selection of the best mother wavelet (MWT) function and depth of the decomposition level in the wavelet denoising EMG signals through the discrete wavelet transform (DWT) method at each decomposition level...
2017: Journal of Healthcare Engineering
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