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https://www.readbyqxmd.com/read/29775909/sensorimotor-control-and-neuromuscular-activity-of-the-shoulder-in-adolescent-competitive-swimmers-with-generalized-joint-hypermobility
#1
Thomas Frydendal, Henrik Eshøj, Behnam Liaghat, Pascal Edouard, Karen Søgaard, Birgit Juul-Kristensen
INTRODUCTION: Shoulder pain is highly prevalent in competitive swimmers, and generalized joint hypermobility (GJH) is considered a risk factor. Sensorimotor control deficiencies and altered neuromuscular activation of the shoulder may represent underlying factors. RESEARCH QUESTION: To investigate whether competitive swimmers with GJH including shoulder hypermobility (GJHS) differ in shoulder sensorimotor control and muscle activity from those without GJH and no shoulder hypermobility (NGJH)...
May 5, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29769821/validity-and-reliability-of-surface-electromyography-measurements-from-a-wearable-athlete-performance-system
#2
Scott K Lynn, Casey M Watkins, Megan A Wong, Katherine Balfany, Daniel F Feeney
The Athos ® wearable system integrates surface electromyography (sEMG ) electrodes into the construction of compression athletic apparel. The Athos system reduces the complexity and increases the portability of collecting EMG data and provides processed data to the end user. The objective of the study was to determine the reliability and validity of Athos as compared with a research grade sEMG system. Twelve healthy subjects performed 7 trials on separate days (1 baseline trial and 6 repeated trials). In each trial subjects wore the wearable sEMG system and had a research grade sEMG system's electrodes placed just distal on the same muscle, as close as possible to the wearable system's electrodes...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29765915/association-between-muscle-activity-and-overjet-in-class-ii-malocclusion-with-surface-electromyography
#3
Shamima Easmin Nishi, Rehana Basri, Norma Ab Rahman, Adam Husein, Mohammad Khursheed Alam
OBJECTIVES: The aim of the study was to assess the association and correlation between the overjet and muscle activity (the masseter and temporalis muscles) in patient with Class II malocclusion in different genders using surface electromyography (sEMG). MATERIALS AND METHODS: The overjet (measured clinically) and electromyographical activity (rest, chew, post chew rest, clench and post clench rest) of the masseter and temporalis muscle of class II malocclusion patient were assessed in 18 patients (3 males and 15 females) from the School of Dental Science, Hospital University Sains Malaysia...
2018: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/29763884/joint-angle-and-movement-velocity-effects-on-muscle-activity-of-elderly-with-knee-osteoarthritis-categorized-and-probabilistic-analysis
#4
João Pedro Batista, Ligia Maria Facci, Alexandre Roberto Marcondes Pelegrinelli, Sylvie Charlotte Frieda Anneliese von Werder, Daniella Carneiro de Souza, Marcelo Taglietti, Josilainne Marcelino Dias, Catherine Disselhorst-Klug, Jefferson Rosa Cardoso
The aim of the study was to determine the effects of joint angle position and angular velocity on concentric and eccentric knee muscles activity of elderly with osteoarthritis (OA) in a deterministic and probabilistic approach compared to matched controls. Concentric and eccentric muscle activation of vastus medialis (VM) and semitendinous (ST) muscles were recorded of eleven elderly women with knee OA (median (Md (25-75%)) age of 62 years (60-72) and Md of body mass index (BMI) of 26 kg/m2 (24.5-27.2)) and ten controls (Md 65 years (62-69) and Md of BMI 24...
April 27, 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29753876/electromyographic-study-of-hip-muscles-involved-in-total-hip-arthroplasty-surprising-results-using-the-direct-anterior-minimally-invasive-approach
#5
Jules Bernard, Fredson Razanabola, Julien Beldame, Stéphane Van Driessche, Helena Brunel, Thomas Poirier, Jean Matsoukis, Fabien Billuart
BACKGROUND: The functional and clinical benefit of minimally invasive total hip arthroplasty (THA) is well-known, but the literature reports impaired gait and posture parameters as compared to the general population, especially following use of the anterior minimally invasive approach, which has more severe impact on posture than the posterior approach. The reasons for this impairment, however, remain unexplained. We therefore conducted a surface electromyography (sEMG) study of the hip muscles liable to be affected by arthroplasty surgery: gluteus maximus (GMax), gluteus medius (GMed, tensor fasciae latae (TFL), and sartorius (S)...
May 10, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29747672/two-ways-to-improve-myoelectric-control-for-a-transhumeral-amputee-after-targeted-muscle-reinnervation-a-case-study
#6
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/29745498/-detection-study-of-walking-segments-of-children-with-cerebral-palsy-based-on-surface-electromyographic-signals
#7
Zhi Lou, Bo Yao, Jihai Yang
In this study, surface electromyography (sEMG) of the lower limbs of cerebral-palsy (CP) subjects in gait cycle was recorded and its parameters of gait cycle characters were analyzed to assess their clinical severity. Three algorithms, including integrated profile (IP), sample-entropy (SampEN) and smooth nonlinear energy operator (SNEO) algorithm, were applied to calculate the duration of walking sEMG segments in simulated SEMG signals. After that, the efficiency and accuracy were compared among these three algorithms...
June 1, 2017: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
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/29735161/the-ipswich-microbreak-technique-to-alleviate-neck-and-shoulder-discomfort-during-microscopic-procedures
#10
Ananth Vijendren, Gavin Devereux, Aaron Tietjen, Kathy Duffield, Vincent Van Rompaey, Paul Van de Heyning, Matthew Yung
Neck and shoulder disorders are a considerable health problem amongst frequent microscope users. We aimed to investigate the neck and shoulder discomfort experienced during prolonged microscopic activity and to assess the benefits of minibreaks. A prospective crossover study was performed on 17 healthy volunteers sitting still while looking down a bench with and without the Ipswich Microbreak Technique (IMT). We used a subjective measure of time to fatigue and pain in the neck and shoulder regions as well as objective readings from a surface electromyogram (sEMG)...
May 4, 2018: Applied Ergonomics
https://www.readbyqxmd.com/read/29732046/semg-signal-acquisition-strategy-towards-hand-fes-control
#11
Cinthya Lourdes Toledo-Peral, Josefina Gutiérrez-Martínez, Jorge Airy Mercado-Gutiérrez, Ana Isabel Martín-Vignon-Whaley, Arturo Vera-Hernández, Lorenzo Leija-Salas
Due to damage of the nervous system, patients experience impediments in their daily life: severe fatigue, tremor or impaired hand dexterity, hemiparesis, or hemiplegia. Surface electromyography (sEMG) signal analysis is used to identify motion; however, standardization of electrode placement and classification of sEMG patterns are major challenges. This paper describes a technique used to acquire sEMG signals for five hand motion patterns from six able-bodied subjects using an array of recording and stimulation electrodes placed on the forearm and its effects over functional electrical stimulation (FES) and volitional sEMG combinations, in order to eventually control a sEMG-driven FES neuroprosthesis for upper limb rehabilitation...
2018: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29726433/automated-error-detection-in-physiotherapy-training
#12
Marko Jovanović, Johannes Seiffarth, Ekaterina Kutafina, Stephan M Jonas
BACKGROUND: Manual skills teaching, such as physiotherapy education, requires immediate teacher feedback for the students during the learning process, which to date can only be performed by expert trainers. OBJECTIVES: A machine-learning system trained only on correct performances to classify and score performed movements, to identify sources of errors in the movement and give feedback to the learner. METHODS: We acquire IMU and sEMG sensor data from a commercial-grade wearable device and construct an HMM-based model for gesture classification, scoring and feedback giving...
2018: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/29723994/virtual-sensor-of-surface-electromyography-in-a-new-extensive-fault-tolerant-classification-system
#13
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/29721510/evaluation-of-skeletal-muscle-function-and-effects-of-early-rehabilitation-during-acute-heart-failure-rationale-and-study-design
#14
Kinga Węgrzynowska-Teodorczyk, Agnieszka Siennicka, Krystian Josiak, Robert Zymliński, Monika Kasztura, Waldemar Banasiak, Piotr Ponikowski, Marek Woźniewski
Background: Acute heart failure (AHF) is associated with disturbances of the peripheral perfusion leading to the dysfunction of many organs. Consequently, an episode of AHF constitutes a "multiple organ failure" which may also affect the skeletal muscles. However, the abnormalities within skeletal muscles during AHF have not been investigated so far. The aim of this project is to comprehensively evaluate skeletal muscles (at a functional and tissue level) during AHF. Methods: The study will include ≥63 consecutive AHF patients who will be randomized into 2 groups: ≥42 with cardiac rehabilitation group versus ≥21 with standard pharmacotherapy alone...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29710749/a-novel-hand-gesture-recognition-method-based-on-2-channel-semg
#15
Hailong Yu, Xueli Fan, Lebin Zhao, Xiaoyang Guo
Hand gesture recognition is getting more and more important in the area of rehabilitation and human machine interface (HMI). However, most current approaches are difficult to achieve practical application because of an excess of sensors. In this work, we proposed a method to recognize six common hand gestures and establish the optimal relationship between hand gesture and muscle by utilizing only two channels of surface electromyography (sEMG). We proposed an integrated approach to process the sEMG data including filtering, endpoint detection, feature extraction, and classifier...
April 14, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29706760/brain-motor-control-assessment-post-early-intensive-hand-rehabilitation-after-spinal-cord-injury
#16
Maryam Zoghi, Mary Galea
Background: The Brain Motor Control Assessment (BMCA) is a surface electromyography (sEMG)-based measure of motor output from the central nervous system during a variety of reflex and voluntary motor tasks. Objective: The aim of this study was to assess the pattern of voluntary movements in patients with spinal cord injury (SCI) to investigate whether BMCA could add more resolution to clinical assessments and the recovery path of these patients. Method: Ten participants were recruited from the Royal Talbot Rehabilitation Centre as part of a multicenter randomized controlled trial...
2018: Topics in Spinal Cord Injury Rehabilitation
https://www.readbyqxmd.com/read/29698877/higher-torque-and-muscle-fibre-conduction-velocity-of-the-biceps-brachii-in-karate-practitioners-during-isokinetic-contractions
#17
Federico Quinzi, Andrea Bianchetti, Francesco Felici, Paola Sbriccoli
PURPOSE: Although upper limb techniques are largely utilized during karate combat competitions scarce information regarding their NM control is available. This study aims at investigating the effect of karate practice on the NM control of Biceps and Triceps Brachii during isokinetic contractions to enhance current knowledge on neuromuscular control adaptations and training methodologies in combat sports. METHODS: Torque and surface electromyograms (sEMG) of Biceps Brachii Caput Longum (BB) and Triceps Brachii Lateral Head (TB) were recorded in eight karate practitioners (KA) and eight age-matched sedentary individuals (CO) during isokinetic elbow flexion-extensions (0-240°/s-1 )...
April 17, 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29695727/functional-and-morphological-changes-in-the-deep-lumbar-multifidus-using-electromyography-and-ultrasound
#18
Shanshan Zhang, Yi Xu, Xiulan Han, Wen Wu, Yan Tang, Chuhuai Wang
Surface electromyography (sEMG) studies have indicated that chronic low back pain (cLBP) involves altered electromyographic activity and morphological structure of the lumbar multifidus (LM) beyond pain perception; however, most studies have evaluated the superficial lumbar multifidus. It is difficult to record electromyography (EMG) signals from the deep multifidus (DM) to determine the neuromuscular activation patterns, making it difficult to determine the relationship between functional and structural changes in cLBP...
April 25, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29689443/the-effect-of-time-on-emg-classification-of-hand-motions-in-able-bodied-and-transradial-amputees
#19
Asim Waris, Imran Khan Niazi, Mohsin Jamil, Omer Gilani, Kevin Englehart, Winnie Jensen, Muhammad Shafique, Ernest Nlandu Kamavuako
While several studies have demonstrated the short-term performance of pattern recognition systems, long-term investigations are very limited. In this study, we investigated changes in classification performance over time. Ten able-bodied individuals and six amputees took part in this study. EMG signals were recorded concurrently from surface and intramuscular electrodes, with intramuscular electrodes kept in the muscles for seven days. Seven hand motions were evaluated daily using linear discriminant analysis and the classification error quantified within (WCE) and between (BCE) days...
April 17, 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29677129/assessment-of-dry-epidermal-electrodes-for-long-term-electromyography-measurements
#20
Momona Yamagami, Keshia M Peters, Ivana Milovanovic, Irene Kuang, Zeyu Yang, Nanshu Lu, Katherine M Steele
Commercially available electrodes can only provide quality surface electromyography (sEMG) measurements for a limited duration due to user discomfort and signal degradation, but in many applications, collecting sEMG data for a full day or longer is desirable to enhance clinical care. Few studies for long-term sEMG have assessed signal quality of electrodes using clinically relevant tests. The goal of this research was to evaluate flexible, gold-based epidermal sensor system (ESS) electrodes for long-term sEMG recordings...
April 20, 2018: Sensors
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