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EMG activity

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https://www.readbyqxmd.com/read/28527720/overactive-bladder-oab-a-symptom-in-search-of-a-disease-its-relationship-to-specific-lower-urinary-tract-symptoms-and-conditions
#1
Jason P Van Batavia, Andrew J Combs, Angela M Fast, Kenneth I Glassberg
BACKGROUND: The ICCS defines OAB by the subjective symptom of urgency; detrusor overactivity (DO) is only implied. While no other symptom is required, OAB can also be associated with urinary frequency, decreased functional bladder capacity, and incontinence. OBJECTIVE: We sought to determine how often these associated findings occur in OAB and what if any uroflow/EMG-defined conditions are found to be associated with it. METHODS: The charts of 548 children (231M, 318F; mean age 9...
March 10, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28527225/clinical-feasibility-of-gait-training-with-a%C3%A2-robotic-exoskeleton-wpal-in-an-individual-with-both-incomplete-cervical-and-complete-thoracic-spinal-cord-injury-a%C3%A2-case-study
#2
Shigeo Tanabe, Soichiro Koyama, Eiichi Saitoh, Satoshi Hirano, Kanan Yatsuya, Tetsuya Tsunoda, Masaki Katoh, Takeshi Gotoh, Ayako Furumoto
BACKGROUND: Patients with tetraplegia can achieve independent gait with lateral-type powered exoskeletons; it is unclear whether medial-type powered exoskeletons allow for this. OBJECTIVE: To investigate gait training with a medial-type powered exoskeleton wearable power-assist locomotor (WPAL) in an individual with incomplete cervical (C5) and complete thoracic (T12) spinal cord injury (SCI). METHODS: The 60-session program was investigated retrospectively using medical records...
May 19, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28527223/muscle-co-contraction-patterns-in-robot-mediated-force-field-learning-to-guide-specific-muscle-group-training
#3
Sara Pizzamiglio, Adela Desowska, Pegah Shojaii, Myriam Taga, Duncan L Turner
BACKGROUND: Muscle co-contraction is a strategy of increasing movement accuracy and stability employed in dealing with perturbation of movement. It is often seen in neuropathological populations. The direction of movement influences the pattern of co-contraction, but not all movements are easily achievable for populations with motor deficits. Manipulating the direction of the force instead, may be a promising rehabilitation protocol to train movement with use of a co-contraction reduction strategy...
May 19, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28526226/experimental-pain-in-the-groin-may-refer-into-the-lower-abdomen-implications-to-clinical-assessments
#4
M K Drew, T S Palsson, R P Hirata, M Izumi, G Lovell, M Welvaert, P Chiarelli, P G Osmotherly, T Graven-Nielsen
OBJECTIVES: To investigate the effects of experimental adductor pain on the pain referral pattern, mechanical sensitivity and muscle activity during common clinical tests. DESIGN: Repeated-measures design. METHODS: In two separate sessions, 15 healthy males received a hypertonic (painful) and isotonic (control) saline injection to either the adductor longus (AL) tendon to produce experimental groin pain or into the rectus femoris (RF) tendon as a painful control...
April 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28522759/effect-of-cyclooxygenase-inhibition-on-the-inspiratory-muscle-metaboreflex-induced-cardiovascular-consequences-in-men
#5
Joshua R Smith, Kaylin D Didier, Shane M Hammer, Andrew M Alexander, Stephanie P Kurti, Steven W Copp, Thomas J Barstow, Craig A Harms
Inspiratory muscle metaboreflex activation increases mean arterial pressure (MAP) and limb vascular resistance (LVR) and decreases limb blood flow (Q̇L). Cyclooxygenase (COX) inhibition has been found to attenuate limb skeletal muscle metaboreflex-induced increases in muscle sympathetic nerve activity. We hypothesized that compared to placebo (PLA), COX inhibition would attenuate inspiratory muscle metaboreflex-induced 1) increases in MAP and LVR and 2) decreases in Q̇L Seven men (22±1 years) were recruited and orally consumed ibuprofen (IB, 10mg/kg) or PLA 90 min prior to performing the cold pressor test (CPT) for 2 min and inspiratory resistive breathing task (IRBT) for 14...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28512539/longitudinal-effects-of-rapid-maxillary-expansion-on-masticatory-muscles-activity
#6
Elena Di Palma, Michele Tepedino, Claudio Chimenti, Gianluca M Tartaglia, Chiarella Sforza
BACKGROUND: To investigate the modifications induced by rapid maxillary expansion (RME) on the electromyographic (EMG) activities of the anterior temporal and superficial masseter muscles, in patients without pre-treatment EMG alterations. MATERIAL AND METHODS: Twenty-one patients with unilateral posterior cross-bite selected from the orthodontic department of the University of L'Aquila (Italy), were enrolled. There was no control group in this study since each subject acted as a control of her/himself...
May 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28511122/robotic-assessment-of-neuromuscular-characteristics-using-musculoskeletal-models-a-pilot-study
#7
V R Jayaneththi, J Viloria, L G Wiedemann, C Jarrett, A J McDaid
OBJECTIVE: Non-invasive neuromuscular characterization aims to provide greater insight into the effectiveness of existing and emerging rehabilitation therapies by quantifying neuromuscular characteristics relating to force production, muscle viscoelasticity and voluntary neural activation. In this paper, we propose a novel approach to evaluate neuromuscular characteristics, such as muscle fiber stiffness and viscosity, by combining robotic and HD-sEMG measurements with computational musculoskeletal modeling...
May 10, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28505208/neuromuscular-function-of-the-quadriceps-muscle-during-isometric-maximal-submaximal-and-submaximal-fatiguing-voluntary-contractions-in-knee-osteoarthrosis-patients
#8
Anett Mau-Moeller, Robert Jacksteit, Mario Jackszis, Frank Feldhege, Matthias Weippert, Wolfram Mittelmeier, Rainer Bader, Ralf Skripitz, Martin Behrens
INTRODUCTION: Knee osteoarthrosis (KOA) is commonly associated with a dysfunction of the quadriceps muscle which contributes to alterations in motor performance. The underlying neuromuscular mechanisms of muscle dysfunction are not fully understood. The main objective of this study was to analyze how KOA affects neuromuscular function of the quadriceps muscle during different contraction intensities. MATERIALS AND METHODS: The following parameters were assessed in 20 patients and 20 healthy controls: (i) joint position sense, i...
2017: PloS One
https://www.readbyqxmd.com/read/28504943/towards-multimodal-human-robot-interaction-to-enhance-active-participation-of-users-in-gait-rehabilitation
#9
Kai Gui, Honghai Liu, Dingguo Zhang
Robotic exoskeletons for physical rehabilitation have been utilized for retraining patients suffering from paraplegia and enhancing motor recovery in recent years. However, users are not voluntarily involved in most systems. This work aims to develop a locomotion trainer with multiple gait patterns, which can be controlled by the active motion intention of users. A multimodal human-robot interaction (HRI) system is established to enhance subject's active participation during gait rehabilitation, which includes cognitive human-robot interaction (cHRI) and physical human-robot interaction (pHRI)...
May 11, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28501953/evaluating-the-contributions-of-muscle-activity-and-joint-kinematics-to-weight-perception-across-multiple-joints
#10
Morgan L Waddell, Eric L Amazeen
Perceived heaviness is clearly a function of muscle activity: objects feel heavy, in part because they are lifted with more force than lighter feeling objects. Recent research showed that participants scale their perceptions to the ratio of muscle activity to lift acceleration during elbow lifts (Waddell et al. J Exp Psychol Hum Percept Perform 42:363-374, 2016). The current study sought psychophysiological functions relating perceived heaviness to EMG and peak lift acceleration across multiple lifts employing different muscles as prime movers...
May 13, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28500671/is-the-firing-rate-of-motor-units-in-different-vastus-medialis-regions-modulated-similarly-during-isometric-contractions
#11
Hélio da V Cabral, Leonardo M L de Souza, Roger G T Mello, Alessio Gallina, Liliam F de Oliveira, Taian M Vieira
INTRODUCTION: Previous evidence suggests the fibres of different motor units reside within distinct vastus medialis (VM) regions. Whether the activity of these motor units may be modulated differently remains unknown. Here we assess the discharge rate of motor units detected proximo-distally from VM to address this issue. METHODS: Surface electromyograms (EMGs) were recorded proximally and distally from VM while ten healthy subjects performed isometric contractions...
May 13, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28500456/sex-differences-in-spatial-accuracy-relate-to-the-neural-activation-of-antagonistic-muscles-in-young-adults
#12
Agostina Casamento-Moran, Sandra K Hunter, Yen-Ting Chen, Min Hyuk Kwon, Emily J Fox, Basma Yacoubi, Evangelos A Christou
Sex is an important physiological variable of behavior, but its effect on motor control remains poorly understood. Some evidence suggests that women exhibit greater variability during constant contractions and poorer accuracy during goal-directed tasks. However, it remains unclear whether motor output variability or altered muscle activation impairs accuracy in women. Here, we examine sex differences in endpoint accuracy during ankle goal-directed movements and the activity of the antagonistic muscles. Ten women (23...
May 12, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28500415/mind-muscle-connection-training-principle-influence-of-muscle-strength-and-training-experience-during-a-pushing-movement
#13
Joaquin Calatayud, Jonas Vinstrup, Markus D Jakobsen, Emil Sundstrup, Juan Carlos Colado, Lars L Andersen
PURPOSE: To investigate the effect of different attentional focus conditions on muscle activity during the push-up exercise and to assess the possible influence of muscle strength and training experience. METHODS: Eighteen resistance-trained men performed 1RM bench press testing and were familiarized with the procedure during the first session. In the second session, three different conditions were randomly performed: regular push-up and push-up focusing on using the pectoralis major and triceps brachii muscles, respectively...
May 12, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28497771/an-isometric-muscle-force-estimation-framework-based-on-a-high-density-surface-emg-array-and-an-nmf-algorithm
#14
Chengjun Huang, Xiang Chen, Shuai Cao, Bensheng Qiu, Xu Zhang
OBJECTIVE: To realize accurate muscle force estimation, a novel framework is proposed in this paper which can extract the input of the prediction model from the appropriate activation area of the skeletal muscle. APPROACH: Surface electromyographic (sEMG) signals from the biceps brachii muscle during isometric elbow flexion were collected with a high-density (HD) electrode grid (128 channels) and the external force at three contraction levels was measured at the wrist synchronously...
May 12, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28497384/physiological-responses-to-incremental-interval-and-continuous-counterweighted-single-leg-and-double-leg-cycling-at-the-same-relative-intensities
#15
Martin J MacInnis, Nathaniel Morris, Michael W Sonne, Amanda Farias Zuniga, Peter J Keir, Jim R Potvin, Martin J Gibala
PURPOSE: We compared physiological responses to incremental, interval, and continuous counterweighted single-leg and double-leg cycling at the same relative intensities. The primary hypothesis was that the counterweight method would elicit greater normalized power (i.e., power/active leg), greater electromyography (EMG) responses, and lower cardiorespiratory demand. METHODS: Graded-exercise tests performed by 12 men (age: 21 ± 2 years; BMI: 24 ± 3 kg/m(2)) initially established that peak oxygen uptake ([Formula: see text]; 76 ± 8...
May 11, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28489897/analysis-of-statistical-and-standard-algorithms-for-detecting-muscle-onset-with-surface-electromyography
#16
Matthew S Tenan, Andrew J Tweedell, Courtney A Haynes
The timing of muscle activity is a commonly applied analytic method to understand how the nervous system controls movement. This study systematically evaluates six classes of standard and statistical algorithms to determine muscle onset in both experimental surface electromyography (EMG) and simulated EMG with a known onset time. Eighteen participants had EMG collected from the biceps brachii and vastus lateralis while performing a biceps curl or knee extension, respectively. Three established methods and three statistical methods for EMG onset were evaluated...
2017: PloS One
https://www.readbyqxmd.com/read/28488824/effects-of-verbal-encouragement-on-force-and-electromyographic-activations-during-handgrip-exercise
#17
Chama Belkhiria, Giovanni DE Marco, Tarak Driss
BACKGROUND: The aim of the present study was to examine the effects of verbal encouragement on isometric force and associated electromyographic (EMG) parameters during a handgrip task. METHODS: Twenty-three participants (12 women and 11 men) performed maximal voluntary isometric handgrip contractions following three conditions: 1) verbal encouragement (VE) condition: participants executed isometric contractions while being verbally encouraged. 2) non verbal encouragement (nVE) condition: the same starting and stopping signal but without encouragement...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28485777/influences-of-cisatracurium-besylate-and-vecuronium-bromide-on-muscle-relaxant-effects-and-electromyography-of-tracheal-intubation-under-general-anesthesia
#18
D-J Yu, H-Y Gao
OBJECTIVE: To observe the influences of atracurium besylate and vecuronium bromide on muscle relaxant effects and electromyography of patients with tracheal intubation under general anesthesia in thyroid surgery. PATIENTS AND METHODS: 120 patients treated with thyroid surgery were randomly divided into group A and group V. Patients in group A were administered with cisatracurium besylate combined with propofol and fentanyl for induction of tracheal intubation under general anesthesia...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28485493/regionalization-of-the-stretch-reflex-in-the-human-vastus-medialis
#19
Alessio Gallina, Jean-Sébastien Blouin, Tanya D Ivanova, S Jayne Garland
The localization of motor unit territories provides an anatomical basis to suggest that the CNS may have more independence in motor unit recruitment and control strategies than what was previously thought. In this study, we investigated whether the human spinal cord has the neuromuscular circuitry to independently activate motor units located in different regions of the vastus medialis. Mechanical taps were applied to multiple locations in the vastus medialis (VM) in nine healthy individuals. Regional responses within the muscle were observed using a grid of 5 × 13 surface EMG electrodes...
May 9, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28483469/spectral-properties-of-multiple-myoelectric-signals-new-insights-into-the-neural-origin-of-muscle-synergies
#20
Julien Frère
It is still unclear if muscle synergies reflect neural strategies or mirror the underlying mechanical constraints. Therefore, this study aimed to verify the consistency of muscle groupings between the synergies based on the linear envelope (LE) of muscle activities and those incorporating the time-frequency (TF) features of the electromyographic (EMG) signals. Twelve healthy participants performed six 20-m walking trials at a comfort and fast self-selected speed, while the activity of eleven lower limb muscles was recorded by means of surface EMG...
May 5, 2017: Neuroscience
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