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https://www.readbyqxmd.com/read/28101944/biomechanical-implications-of-walking-with-indigenous-footwear
#1
Catherine Willems, Gaetane Stassijns, Wim Cornelis, Kristiaan D'Août
OBJECTIVES: This study investigates biomechanical implications of walking with indigenous "Kolhapuri" footwear compared to barefoot walking among a population of South Indians. MATERIALS AND METHODS: Ten healthy adults from South India walked barefoot and indigenously shod at voluntary speed on an artificial substrate. The experiment was repeated outside, on a natural substrate. Data were collected from (1) a heel-mounted 3D-accelerometer recording peak impact at heel contact, (2) an ankle-mounted 3D-goniometer (plantar/dorsiflexion and inversion/eversion), and (3) sEMG electrodes at the m...
January 19, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28088014/reduced-complexity-of-force-and-muscle-activity-during-low-level-isometric-contractions-of-the-ankle-in-diabetic-individuals
#2
E Y Suda, P Madeleine, R P Hirata, A Samani, T T Kawamura, I C N Sacco
BACKGROUND: This study evaluated the structure and amount of variability of surface electromyography (sEMG) patterns and ankle force data during low-level isometric contractions in diabetic subjects with different degrees of neuropathy. METHODS: We assessed 10 control subjects and 38 diabetic patients, classified as absent, mild, moderate, or severe neuropathy, by a fuzzy system based on clinical variables. Multichannel sEMG (64-electrode matrix) of tibialis anterior and gastrocnemius medialis muscles were acquired during isometric contractions at 10%, 20%, and 30% of the maximum voluntary contraction, and force levels during dorsi- and plantarflexion were recorded...
January 4, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28079030/neuromusculoskeletal-model-self-calibration-for-on-line-sequential-bayesian-moment-estimation
#3
Diana Ruiz Bueno, Luis Montano
OBJECTIVE: Neuromusculoskeletal models involve many subject-specific physiological parameters that need to be adjusted to adequately represent muscle properties. Traditionally, neuromusculoskeletal models have been calibrated with a forward-inverse dynamic optimization which is time-consuming and unfeasible for rehabilitation therapy. Non self-calibration algorithms have been applied to these models. To the best of our knowledge, the algorithm proposed in this work is the first on-line calibration algorithm for muscle models that allows a generic model to be adjusted to different subjects in a few steps...
January 12, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28076293/electromyographic-classification-of-effort-in-muscle-strength-assessment
#4
Karan Veer, Tanu Sharma
Dual-channel evaluation of surface electromyogram (SEMG) signals acquired from amputee subjects using computational techniques for classification of arm motions is presented in this study. SEMG signals were classified by the neural network (NN) and interpretation was done using statistical techniques to extract the effectiveness of the recorded signals. From the results, it was observed that there exists a calculative difference in amplitude gain across different motions and that SEMG signals have great potential to classify arm motions...
January 11, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28075248/evaluation-of-vibrant-muscles-over-shoulder-region-among-workers-of-the-hand-screen-printing-industry
#5
Subramaniam Shankar, Raju Naveenkumar, Jeganathan Karthick, Periyasamy Mohankumar
This study focuses on the evaluation of the muscle activities associated with shoulder pain among workers of the hand screen printing (HSP) industry. Activities of three major muscles which showed higher muscle activity for a HSP job were observed for fatigue using surface electromyography (SEMG). The anatomical sites were chosen on the basis of a statistical survey and visual inspection conducted before the experiment. Activities of the deltoid, teres major and infraspinatus were recorded using SEMG and the nature of muscle activities was studied for about 50 m of cloth printing...
January 11, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28061779/a-motion-classification-strategy-based-on-semg-eeg-signal-combination-for-upper-limb-amputees
#6
Xiangxin Li, Oluwarotimi Williams Samuel, Xu Zhang, Hui Wang, Peng Fang, Guanglin Li
BACKGROUND: Most of the modern motorized prostheses are controlled with the surface electromyography (sEMG) recorded on the residual muscles of amputated limbs. However, the residual muscles are usually limited, especially after above-elbow amputations, which would not provide enough sEMG for the control of prostheses with multiple degrees of freedom. Signal fusion is a possible approach to solve the problem of insufficient control commands, where some non-EMG signals are combined with sEMG signals to provide sufficient information for motion intension decoding...
January 7, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28061379/assessment-of-the-non-gaussianity-and-non-linearity-levels-of-simulated-semg-signals-on-stationary-segments
#7
Noureddine Messaoudi, Raïs El'hadi Bekka, Philippe Ravier, Rachid Harba
The purpose of this paper was to evaluate the effects of the longitudinal single differential (LSD), the longitudinal double differential (LDD) and the normal double differential (NDD) spatial filters, the electrode shape, the inter-electrode distance (IED) on non-Gaussianity and non-linearity levels of simulated surface EMG (sEMG) signals when the maximum voluntary contraction (MVC) varied from 10% to 100% by a step of 10%. The effects of recruitment range thresholds (RR), the firing rate (FR) strategy and the peak firing rate (PFR) of motor units were also considered...
December 25, 2016: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28054301/ranking-hand-movements-for-myoelectric-pattern-recognition-considering-forearm-muscle-structure
#8
Youngjin Na, Sangjoon J Kim, Sungho Jo, Jung Kim
Previous pattern recognition algorithms using surface electromyography (sEMG) have been developed for subsets of predefined hand movements without considering muscle structure. In order to decode hand movements, it is important to know which movements are appropriate for PR due to the different independence of movements between individuals and the high correlated characteristics of sEMG patterns between movements. This paper proposes a method to personally rank the order of hand movements from subsets (31 finger flexion, 31 finger extension, and 4 wrist movements in this paper)...
January 4, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28027792/-clinical-practice-guidelines-irritable-bowel-syndrome-with-constipation-and-functional-constipation-in-adults-concept-diagnosis-and-healthcare-continuity-part-1-of-2
#9
F Mearin, C Ciriza, M Mínguez, E Rey, J J Mascort, E Peña, P Cañones, J Júdez
In this Clinical practice guide, an analysis is made of the diagnosis and treatment of adult patients with constipation and abdominal discomfort, under the spectrum of irritable bowel syndrome and functional constipation. These have an important personal, health and social impact, affecting the quality of life of these patients. In irritable bowel syndrome with a predominance of constipation, this is the predominant change in bowel movements, with recurrent abdominal pain, bloating and frequent abdominal distension...
December 24, 2016: Atencion Primaria
https://www.readbyqxmd.com/read/28026793/a-wireless-semg-based-body-machine-interface-for-assistive-technology-devices
#10
Cheikh Latyr Fall, Gabriel Gagnon-Turcotte, J F Dube, Jean Simon Gagne, Yanick Delisle, Alexandre Campeau-Lecours, Clement Gosselin, Benoit Gosselin
Assistive Technology (AT) tools and appliances are being more and more widely used and developed worldwide to improve the autonomy of people living with disabilities and ease the interaction with their environments. This paper describes an intuitive and wireless surface electromyography (sEMG) based body-machine interface for AT tools. Spinal cord injuries (SCIs) at C5-C8 levels affect patients' arms, forearms, hands and fingers control. Thus, using classical AT control interfaces (keypads, joysticks, etc.) is often difficult or impossible...
December 21, 2016: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28024923/management-and-follow-up-of-the-male-with-lower-urinary-tract-symptoms-secondary-to-benign-prostate-hyperplasia
#11
J Castiñeiras, J M Cózar, B Miñana, F J Brenes, F Brotons, A Fernández-Pro, J A Martín, Mª L Martínez-Berganza, J M Molero
Benign prostate hyperplasia (BPH) is a high-incidence pathology. Its diagnosis and treatment is shared between urologists and Primary Care physicians. Its management consumes a huge amount of resources. The the Spanish Association of Urology [AEU], Spanish Society of Primary Care Physicians [SEMERGEN], the Spanish Society of General Practitioners and Family Doctors [SEMG] and the Spanish Society of Family and Community Medicine [semFYC] have prepared a document on management and monitoring of BPH, in which the aim is to incorporate the latest evidence to so as to update the previously published guidelines and which are presented here in condensed form...
December 23, 2016: Actas Urologicas Españolas
https://www.readbyqxmd.com/read/28017295/older-adults-show-higher-increases-in-lower-limb-muscle-activity-during-whole-body-vibration-exercise
#12
Karin Lienhard, Jordyn Vienneau, Sandro Nigg, Bernd Friesenbichler, Benno M Nigg
The purpose of this study was to compare lower limb muscle activity during whole-body vibration (WBV) exercise between a young and an older study population. Thirty young (25.9±4.3yrs) and thirty older (64.2±5.3yrs) individuals stood on a side-alternating WBV platform while surface electromyography (sEMG) was measured for the tibialis anterior (TA), gastrocnemius medialis (GM), soleus (SOL), vastus lateralis (VL), vastus medialis (VM), and biceps femoris (BF). The WBV protocol included nine vibration settings consisting of three frequencies (6, 11, 16Hz) x three amplitudes (0...
December 14, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/28009532/feed-forward-regulation-of-self-selected-exercise-intensity-in-response-to-different-rates-of-arterial-deoxygenation
#13
Saro D Farra
Arterial desaturation impairs exercise performance in a dose-dependent manner. However, new theories of exercise-induced fatigue suggest that increasing rates of arterial deoxygenation augment the fatigue response during exercise. The purpose of this dissertation is to clarify if self-selected exercise intensity, while exercising at a constant rate of perceived exertion (RPE), is sensitive to alterations in the absolute arterial saturation (SPO2) and/or the rate of change in SPO2. Subjects performed constant RPE exercise for 30 min...
January 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28002429/inter-gender-semg-evaluation-of-central-and-peripheral-fatigue-in-biceps-brachii-of-young-healthy-subjects
#14
Federico Meduri, Matteo Beretta-Piccoli, Luca Calanni, Valentina Segreto, Giuseppe Giovanetti, Marco Barbero, Corrado Cescon, Giuseppe D'Antona
PURPOSE: The purpose of the present study was to evaluate inter-arm and inter-gender differences in fractal dimension (FD) and conduction velocity (CV) obtained from multichannel surface electromyographic (sEMG) recordings during sustained fatiguing contractions of the biceps brachii. METHODS: A total of 20 recreationally active males (24±6 years) and 18 recreationally active females (22±9 years) performed two isometric contractions at 120 degrees elbow joint angle: (1) at 20% maximal voluntary contraction (MVC) for 90 s, and (2) at 60% MVC until exhaustion the time to perform the task has been measured...
2016: PloS One
https://www.readbyqxmd.com/read/28000186/-value-of-anorectal-manometry-in-defecation-disorders-and-its-clinical-interpretation
#15
Shuqing Ding
Bowel dysfunction affected by functional factors, mechanical factors or surgical damage may lead to constipation, fecal incontinence and other overlapped symptoms, which is only the tip of the iceberg. Anorectal manometry can provide combined dysfunction information of four subtypes, including sphincter dysfunction, dyssynergic defecation, sensory disability and insufficient rectal expel force, which are underlying pathophysiology of defecation dysfunction. Anorectal manometry can be helpful in optimizing protocol or predicting success in pelvic floor dyssynergic syndrome of defecation, fecal incontinence or anorectal pain, stoma closure and pediatric intractable constipation...
December 25, 2016: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/27992345/continuous-estimation-of-human-multi-joint-angles-from-semg-using-a-state-space-model
#16
Qichuan Ding, Jianda Han, Xingang Zhao
Due to the couplings among joint-relative muscles, it is a challenge to accurately estimate continuous multi-joint movements from multi-channel sEMG signals. Traditional approaches always build a nonlinear regression model, such as artificial neural network, to predict the multi-joint movement variables using sEMG as inputs. However, the redundant sEMGdata are always not distinguished; the prediction errors cannot be evaluated and corrected online as well. In this work, a correlation-based redundancy-segmentation method is proposed to segment the sEMG-vector including redundancy into irredundant and redundant subvectors...
December 14, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27990244/electrically-and-hybrid-induced-muscle-activations-effects-of-muscle-size-and-fiber-type
#17
Kelly Stratton, Pouran D Faghri
The effect of three electrical stimulation (ES) frequencies (10, 35, and 50 Hz) on two muscle groups with different proportions of fast and slow twitch fibers (abductor pollicis brevis (APB) and vastus lateralis (VL)) was explored. We evaluated the acute muscles' responses individually and during hybrid activations (ES superimposed by voluntary activations). Surface electromyography (sEMG) and force measurements were evaluated as outcomes. Ten healthy adults (mean age: 24.4 ± 2.5 years) participated after signing an informed consent form approved by the university Institutional Review Board...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27916853/a-pilot-study-of-individual-muscle-force-prediction-during-elbow-flexion-and-extension-in-the-neurorehabilitation-field
#18
Jiateng Hou, Yingfei Sun, Lixin Sun, Bingyu Pan, Zhipei Huang, Jiankang Wu, Zhiqiang Zhang
This paper proposes a neuromusculoskeletal (NMS) model to predict individual muscle force during elbow flexion and extension. Four male subjects were asked to do voluntary elbow flexion and extension. An inertial sensor and surface electromyography (sEMG) sensors were attached to subject's forearm. Joint angle calculated by fusion of acceleration and angular rate using an extended Kalman filter (EKF) and muscle activations obtained from the sEMG signals were taken as the inputs of the proposed NMS model to determine individual muscle force...
November 29, 2016: Sensors
https://www.readbyqxmd.com/read/27913353/embroidered-electromyography-a-systematic-design-guide
#19
Ali Shafti, Roger Ribas Manero, Amanda Borg, Kaspar Althoefer, Matthew Howard
Muscle activity monitoring or Electromyography (EMG) is a useful tool. However, EMG is typically invasive, expensive and difficult to use for untrained users. A possible solution is textile-based surface EMG (sEMG) integrated into clothing as a wearable device. This is, however, challenging due to (i) uncertainties in the electrical properties of conductive threads used for electrodes, (ii) imprecise fabrication technologies (e.g., embroidery, sewing), and (iii) lack of standardization in design variable selection...
December 1, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27909939/a-novel-fuzzy-approach-for-automatic-brunnstrom-stage-classification-using-surface-electromyography
#20
Luca Liparulo, Zhe Zhang, Massimo Panella, Xudong Gu, Qiang Fang
Clinical assessment plays a major role in post-stroke rehabilitation programs for evaluating impairment level and tracking recovery progress. Conventionally, this process is manually performed by clinicians using chart-based ordinal scales which can be both subjective and inefficient. In this paper, a novel approach based on fuzzy logic is proposed which automatically evaluates stroke patients' impairment level using single-channel surface electromyography (sEMG) signals and generates objective classification results based on the widely used Brunnstrom stages of recovery...
December 1, 2016: Medical & Biological Engineering & Computing
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