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https://www.readbyqxmd.com/read/29332743/myoeletric-indices-of-fatigue-adopting-different-rest-intervals-during-leg-press-sets
#1
Humberto Miranda, Marianna Maia, Carlos G de Oliveira, Déborah Farias, Jurandir B da Silva, Vicente P Lima, Jeffrey M Willardson, Gabriel A Paz
INTRODUCTION: The purpose of this study was to examine the acute effect of different rest intervals between multiple sets of the 45° angled leg press exercise (LP45) on surface electromyographic (SEMG) spectral and amplitude indices of fatigue. METHODS: Fifteen recreationally trained females performed three protocols in a randomized crossover design; each consisting of four sets of 10 repetitions with 1 (P1), 3 (P3), or 5 (P5) minute rest intervals between sets...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29325515/safer-chairs-for-elderly-patients-design-evaluation-using-electromyography-and-force-measurement
#2
Shabboo Valipoor, Debajyoti Pati, Matt S Stock, Doug Bazuin
A vast majority of patient fall events in hospitals involve the elderly. In inpatient care settings, despite the risk of fall, patients are encouraged to leave their bed, move around their room, and sit on their chair to progress in their healing. Despite the vital role of patient chair design in improving recovery, few studies have examined the ergonomic requirements of safe patient chairs. This study examined the impact of manipulating horizontal and vertical positions of armrests in a test chair on required physical effort during Stand-to-Sit-to-Stand (St-Si-St) transitions among fifteen elderly women...
January 11, 2018: Ergonomics
https://www.readbyqxmd.com/read/29322223/is-the-timed-loaded-standing-test-a-valid-measure-of-back-muscle-endurance-in-people-with-vertebral-osteoporosis
#3
M Newman, R Newman, T Hughes, K Vadher, K L Barker
Timed loaded standing (TLS) is a suggested measure of back muscle endurance for people with vertebral osteoporosis. Surface electromyography revealed back muscles work harder and fatigue during TLS. The test end-point and total time were associated with back fatigue. The findings help demonstrate the concurrent validity of the TLS test. INTRODUCTION: The TLS test is suggested as a measure of back muscle endurance for patients with vertebral osteoporosis. However, to date, no study has demonstrated that TLS does measure back extensor or erector spinae (ES) muscle endurance...
January 10, 2018: Osteoporosis International
https://www.readbyqxmd.com/read/29313181/intraoperative-neurophysiological-monitoring-during-spinal-surgery-technical-review-in-open-and-minimally-invasive-approaches
#4
REVIEW
Fabio Cofano, Francesco Zenga, Marco Mammi, Roberto Altieri, Nicola Marengo, Marco Ajello, Paolo Pacca, Antonio Melcarne, Carola Junemann, Alessandro Ducati, Diego Garbossa
Neurophysiological monitoring is of undoubted value for the intraoperative safety of neurosurgical procedures. Widely developed and used for cranial surgery, it is equally as effective, though perhaps less commonly employed, for spinal pathology. The most frequently used techniques for intraoperative monitoring during spinal surgery include somatosensory evoked potentials (SSEPs), motor evoked potentials (MEPs) and electromyography, which can either be spontaneous free-running (sEMG) or triggered (tEMG). The knowledge of the benefits and limitations of each modality is essential in optimising the value of intraoperative monitoring during spinal procedures...
January 8, 2018: Neurosurgical Review
https://www.readbyqxmd.com/read/29301203/wireless-semg-system-with-a-microneedle-based-high-density-electrode-array-on-a-flexible-substrate
#5
Minjae Kim, Gangyong Gu, Kyoung Je Cha, Dong Sung Kim, Wan Kyun Chung
Surface electromyography (sEMG) signals reflect muscle contraction and hence, can provide information regarding a user's movement intention. High-density sEMG systems have been proposed to measure muscle activity in small areas and to estimate complex motion using spatial patterns. However, conventional systems based on wet electrodes have several limitations. For example, the electrolyte enclosed in wet electrodes restricts spatial resolution, and these conventional bulky systems limit natural movements. In this paper, a microneedle-based high-density electrode array on a circuit integrated flexible substrate for sEMG is proposed...
December 30, 2017: Sensors
https://www.readbyqxmd.com/read/29249346/surface-electromyography-based-muscle-fatigue-detection-using-high-resolution-time-frequency-methods-and-machine-learning-algorithms
#6
P A Karthick, Diptasree Maitra Ghosh, S Ramakrishnan
BACKGROUND AND OBJECTIVE: Surface electromyography (sEMG) based muscle fatigue research is widely preferred in sports science and occupational/rehabilitation studies due to its noninvasiveness. However, these signals are complex, multicomponent and highly nonstationary with large inter-subject variations, particularly during dynamic contractions. Hence, time-frequency based machine learning methodologies can improve the design of automated system for these signals. METHODS: In this work, the analysis based on high-resolution time-frequency methods, namely, Stockwell transform (S-transform), B-distribution (BD) and extended modified B-distribution (EMBD) are proposed to differentiate the dynamic muscle nonfatigue and fatigue conditions...
February 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29238254/assessment-of-three-dimensional-trunk-kinematics-and-muscle-activation-during-cycling-with-independent-cranks
#7
Eric Bourdon, Matthew Mavor, Dean C Hay
Independent cranks (IC) are recently introduced bicycle cranks that are decoupled; therefore allowing each leg to pedal independent of the other. Despite this introduction, limited research has been conducted assessing biomechanical changes when cycling with IC. Therefore, the purpose of this study was to evaluate and compare trunk kinematics and surface electromyography (sEMG) during IC and normal crank (NC) cycling during a graded exercise test to volitional fatigue. Ten healthy, physically active men performed two tests (IC and NC) on a cycling ergometer on separate days...
December 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29228936/inter-day-reliability-of-surface-electromyography-recordings-of-the-lumbar-part-of-erector-spinae-longissimus-and-trapezius-descendens-during-box-lifting
#8
Mikkel Brandt, Lars Louis Andersen, Afshin Samani, Markus Due Jakobsen, Pascal Madeleine
BACKGROUND: Low back pain and neck-shoulder pain are the most reported types of work-related musculoskeletal disorders, and performing heavy lifting at work and working with trunk rotation increase the risk of developing work-related musculoskeletal disorders. Surface electromyography (sEMG) provides information about the electrical activity of muscles. Thus it has the potential to retrieve indirect information about the physical exposure of specific muscles of workers during their actual work...
December 11, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29216231/a-computational-model-to-investigate-the-effect-of-pennation-angle-on-surface-electromyogram-of-tibialis-anterior
#9
Diptasree Maitra Ghosh, Dinesh Kumar, Sridhar Poosapadi Arjunan, Ariba Siddiqi, Ramakrishnan Swaminathan
This study has described and experimentally validated the differential electrodes surface electromyography (sEMG) model for tibialis anterior muscles during isometric contraction. This model has investigated the effect of pennation angle on the simulated sEMG signal. The results show that there is no significant effect of pennation angle in the range 0° to 20° to the single fibre action potential shape recorded on the skin surface. However, the changes with respect to pennation angle are observed in sEMG amplitude, frequency and fractal dimension...
2017: PloS One
https://www.readbyqxmd.com/read/29205214/biomechanics-of-the-shoulder-girdle-a-case-study-on-the-effects-of-union-rugby-tackles
#10
Luís Faria, Bárbara Campos, Renato Natal Jorge
PURPOSE: The shoulder girdle is a complex system, comprised by a kinematic chain and stabilizers. Due to the delicate equilibrium and synchronism between mobility and stability, high external loads may compromise its physiology, increasing the risk of injuries. Thus, this study intends to fully characterize the effects of a rugby tackle on the shoulder's anatomy and physiology. METHODS: For the experimental procedures, a matrix of pressure sensors was used, based on the Teckscan® pressure in-soles, force plates, an isokinetic dynamometer and sEMG (surface electromyography)...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/29204914/muscle-fiber-conduction-velocity-and-emg-amplitude-of-the-upper-trapezius-muscle-in-healthy-subjects-after-low-level-laser-irradiation-a-randomized-double-blind-placebo-controlled-crossover-study
#11
Fabiana Sarilho de Mendonça, Paulo de Tarso Camillo de Carvalho, Daniela Aparecida Biasotto-Gonzalez, Simone Aparecida Penimpedo Calamita, Cid André Fidelis de Paula Gomes, César Ferreira Amorim, Marco Antônio Fumagalli, Fabiano Politti
Although low-level laser therapy (LLLT) is an important resource for the treatment of non-specific neck pain patients, the dose which presents the greatest therapeutic potential for the treatment of this pathology is still unclear. The present study aimed to evaluate the immediate effect of LLLT on the muscle fiber conduction velocity (MFCV) and electromyographic activity (EMG) of the upper trapezius (UT) muscle in healthy individuals. A total of 20 healthy subjects were enrolled in a randomized, double-blind, crossover study...
December 5, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29188450/ankle-muscle-activity-modulation-during-single-leg-stance-differs-between-children-young-adults-and-seniors
#12
Eduard Kurz, Oliver Faude, Ralf Roth, Lukas Zahner, Lars Donath
PURPOSE: Incomplete maturation and aging-induced declines of the neuromuscular system affect postural control both in children and older adults and lead to high fall rates. Age-specific comparisons of the modulation of ankle muscle activation and behavioral center of pressure (COP) indices during upright stance have been rarely conducted. The objective of the present study was to quantify aging effects on a neuromuscular level. Thus, surface electromyography (SEMG) modulation and co-activity of ankle muscles during single-leg standing was compared in healthy children, young adults and seniors...
November 29, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29176075/detection-of-surface-emg-activity-from-extensor-digitorum-brevis-muscle-in-healthy-children-walking
#13
Francesco Di Nardo, Annachiara Strazza, Michela Sara Palmieri, Alessandro Mengarelli, Laura Burattini, Ornella Orsini, Antonio Bortone, Sandro Fioretti
The purpose of the study was the assessment of activation patterns of Extensor digitorum brevis (EDB) muscle in healthy children, during walking at self-selected speed and cadence. To this aim, Statistical gait analysis was performed on surface electromyographic (sEMG) signals of EDB, in a large number (hundreds) of strides per subject. sEMG data from Tibialis Anterior (TA) and Gastrocnemius Lateralis (GL) were also investigated for comparative purposes. Results from twenty-three healthy children showed a large variability in number of muscle activations, occurrence frequency, and onset-offset instants across considered strides...
November 26, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/29172012/do-whole-body-vibration-exercises-affect-lower-limbs-neuromuscular-activity-in-populations-with-a-medical-condition-a-systematic-review
#14
Carla Fontoura Dionello, Patrícia Lopes de Souza, Danubia Sá-Caputo, Danielle Soares Morel, Eloá Moreira-Marconi, Laisa Liane Paineiras-Domingos, Eric Heleno Freire Ferreira Frederico, Eliane Guedes-Aguiar, Patricia de Castro Paiva, Redha Taiar, Xavier Chiementin, Pedro J Marín, Mario Bernardo-Filho
BACKGROUND: The use of surface electromyography (sEMG) to evaluate muscle activation when executing whole body vibration exercises (WBVE) in studies provide neuromuscular findings, in healthy and diseased populations. OBJECTIVES: Perform a systematic review of the effects of WBVE by sEMG of lower limbs in non-healthy populations. METHODS: The search using the defined keywords was performed in PubMed, PEDRo and EMBASE databases by three independent researchers...
2017: Restorative Neurology and Neuroscience
https://www.readbyqxmd.com/read/29171789/accuracy-of-identification-of-low-or-high-risk-lifting-during-standardized-lifting-situations
#15
Mikkel Brandt, Pascal Madeleine, Afshin Samani, Markus Due Jakobsen, Sebastian Skals, Jonas Vinstrup, Lars Louis Andersen
The aim was to classify lifting activities into low and high risk categories (according to The Danish Working Environment Authority guidelines) based on surface electromyography (sEMG) and trunk inclination (tri-axial accelerometer) measurements. Lifting tasks with different weights, horizontal distance and technique were performed. The lifting tasks were characterized by a feature vector composed of either the 90(th), 95(th) or 99(th) percentile of sEMG activity level and trunk inclinations during the task...
November 24, 2017: Ergonomics
https://www.readbyqxmd.com/read/29170819/tongue-pressure-production-and-submental-surface-electromyogram-activities-during-tongue-hold-swallow-with-different-holding-positions-and-tongue-length
#16
Shigehiro Fujiwara, Masako Fujiu-Kurachi, Kazuhiro Hori, Yoshinobu Maeda, Takahiro Ono
Our previous study regarding the tongue-hold swallow (THS) demonstrated that the tongue-to-palate contact during THS could be influenced by the maximum tongue protrusion length (MTPL) of individual subjects, resulting in two different patterns of pressure generation. The present study further analyzed the influence of MTPL on the tongue pressure production along with submental surface electromyography (sEMG) during THS, in order to establish an index to better control THS effects. Tongue pressure using a sensor sheet system and concurrent submental sEMG activities were measured during swallowing tasks in 18 healthy young adults...
November 24, 2017: Dysphagia
https://www.readbyqxmd.com/read/29157238/evaluation-of-normal-swallowing-functions-by-using-dynamic-high-density-surface-electromyography-maps
#17
Mingxing Zhu, Bin Yu, Wanzhang Yang, Yanbing Jiang, Lin Lu, Zhen Huang, Shixiong Chen, Guanglin Li
BACKGROUND: Swallowing is a continuous process with substantive interdependencies among different muscles, and it plays a significant role in our daily life. The aim of this study was to propose a novel technique based on high-density surface electromyography (HD sEMG) for the evaluation of normal swallowing functions. METHODS: A total of 96 electrodes were placed on the front neck to acquire myoelectric signals from 12 healthy subjects while they were performing different swallowing tasks...
November 21, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29147663/can-the-weight-of-an-external-breast-prosthesis-influence-trunk-biomechanics-during-functional-movement-in-postmastectomy-women
#18
Katarzyna Hojan, Faustyna Manikowska
Introduction: Recent papers indicate that one-side mastectomy can produce deleterious effects on the posture and musculoskeletal system. This study was conducted to better understand the underlying mechanisms involved in trunk motion in external prosthesis users. Objective: The aim was to evaluate the changes in surface electromyographic (SEMG) activity of the erector spinae muscles (ES) in postmastectomy women with and without breast prostheses during functional body movement tests...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29143566/electromyographic-evaluation-in-children-orthodontically-treated-for-skeletal-class-ii-malocclusion-comparison-of-two-treatment-techniques
#19
Eleonora Ortu, Davide Pietropaoli, Fray Adib, Chiara Masci, Mario Giannoni, Annalisa Monaco
Objective To compare the clinical efficacy of two techniques for fabricating a Bimler device by assessing the patient's surface electromyography (sEMG) activity at rest before treatment and six months after treatment. Methods Twenty-four patients undergoing orthodontic treatment were enrolled in the study; 12 formed the test group and wore a Bimler device fabricated with a Myoprint impression using neuromuscular orthodontic technique and 12 formed the control group and were treated by traditional orthodontic technique with a wax bite in protrusion...
November 16, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/29139040/recommendations-for-the-follow-up-care-of-female-breast-cancer-survivors-a-guideline-of-the-spanish-society-of-medical-oncology-seom-spanish-society-of-general-medicine-semergen-spanish-society-for-family-and-community-medicine-semfyc-spanish-society-for-general
#20
A Barnadas, M Algara, O Cordoba, A Casas, M Gonzalez, M Marzo, A Montero, M Muñoz, A Ruiz, F Santolaya, T Fernandez
The increased incidence and decreased mortality of breast cancer have produced an increased number of breast cancer survivors. The type of sequelae and comorbidities that these patients present call for a collaborative follow-up by hospital-based specialized care and primary care. In this document, we present a guideline drafted and agreed among scientific societies whose members care for breast cancer survivors. The purpose of this guideline is to achieve the shared and coordinated follow-up of these patients by specialized care and primary care professionals...
November 14, 2017: Clinical & Translational Oncology
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