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https://www.readbyqxmd.com/read/28095102/electromyographic-analysis-of-gluteus-maximus-and-hamstring-activity-during-the-supine-resisted-hip-extension-exercise-versus-supine-unilateral-bridge-to-neutral
#1
James W Youdas, James P Hartman, Brooke A Murphy, Ashley M Rundle, Jenna M Ugorowski, John H Hollman
Hip extension strengthening exercises which maximize gluteus maximus contributions and minimize hamstring influences may be beneficial for persons with hip pain. This study's aim was to compare muscle activation of the gluteus maximus and hamstrings from healthy subjects during a supine resisted hip extension exercise versus supine unilateral bridge to neutral. Surface electromyographic (EMG) signals were obtained from the right gluteus maximus and hamstrings in 13 healthy male and 13 healthy female subjects...
January 17, 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28089323/neurophysiological-monitoring-of-lumbar-spinal-nerve-roots-a-case-report-of-postoperative-deficit-and-literature-review
#2
Yuguang Chen, Baoqing P Wang, Junlin Yang, Yaolong Deng
INTRODUCTION: Intraoperative neurophysiological monitoring (IONM) has proven to help reduce the probability of postoperative neurological deficit for spinal deformity correctional surgeries. However, in rare cases new deficits may still happen. We report a surgical case in which the patient had postoperative paralysis. We would like to call for more case reports with postoperative neurological deficits as they present difficult clinical cases. PRESENTATION OF CASE: A 61-year-old male patient with severe thoracolumbar kyphoscoliosis underwent posterior spinal correction and fusion with segmental T10-L5 pedicle screws and rods instrumentation with IONM...
November 19, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28063158/muscle-cramp-susceptibility-increases-following-a-volitionally-induced-muscle-cramp
#3
Kevin C Miller, Blaine C Long, Jeffrey E Edwards
INTRODUCTION: Muscle cramping may increase peripheral nervous system excitability. It is unknown if, and how long, cramp susceptibility is affected by previous cramping. We tested whether volitionally-induced muscle cramps (VIMC) lowered cramp threshold frequency (TFc ) and how long TFc was affected post-VIMC. METHODS: Fifteen cramp-prone participants volitionally-induced a flexor hallucis brevis (FHB) cramp on 4 separate days. FHB TFc was measured before VIMC (i...
January 7, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28061506/role-of-rem-sleep-melanin-concentrating-hormone-and-orexin-hypocretin-systems-in-the-sleep-deprivation-pre-ischemia
#4
Marta Pace, Antoine Adamantidis, Laura Facchin, Claudio Bassetti
STUDY OBJECTIVES: Sleep reduction after stroke is linked to poor recovery in patients. Conversely, a neuroprotective effect is observed in animals subjected to acute sleep deprivation (SD) before ischemia. This neuroprotection is associated with an increase of the sleep, melanin concentrating hormone (MCH) and orexin/hypocretin (OX) systems. This study aims to 1) assess the relationship between sleep and recovery; 2) test the association between MCH and OX systems with the pathological mechanisms of stroke...
2017: PloS One
https://www.readbyqxmd.com/read/28061379/assessment-of-the-non-gaussianity-and-non-linearity-levels-of-simulated-semg-signals-on-stationary-segments
#5
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/28060526/effects-of-dual-monitor-computer-work-versus-laptop-work-on-cervical-muscular-and-proprioceptive-characteristics-of-males-and-females
#6
Amanda M Farias Zuniga, Julie N Côté
OBJECTIVE: The effects of performing a 90-minute computer task with a laptop versus a dual monitor desktop workstation were investigated in healthy young male and female adults. BACKGROUND: Work-related musculoskeletal disorders are common among computer (especially female) users. Laptops have surpassed desktop computer sales, and working with multiple monitors has also become popular. However, few studies have provided objective evidence on how they affect the musculoskeletal system in both genders...
December 1, 2016: Human Factors
https://www.readbyqxmd.com/read/28052417/c8-cross-transfer-for-the-treatment-of-caudal-brachial-plexus-avulsion-in-three-dogs
#7
Pierre Moissonnier, Claude Carozzo, Jean-Laurent Thibaut, Catherine Escriou, Antoine Hidalgo, Stéphane Blot
OBJECTIVE: To evaluate the cervical nerve 8 cross-transfer technique (C8CT) as a part of surgical treatment of caudal brachial plexus avulsion (BPA) in the dog. STUDY DESIGN: Case series. ANIMALS: Client-owned dogs suspected to have caudal BPA based on neurological examination and electrophysiological testing (n = 3). METHODS: The distal stump of the surgically transected contralateral C8 ventral branch (donor) was bridged to the proximal stump of the avulsed C8 ventral branch (recipient) and secured with 9-0 polypropylene suture under an operating microscope...
January 2017: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/28040656/squat-test-performance-and-execution-in-children-with-and-without-cerebral-palsy
#8
M M Eken, J Harlaar, A J Dallmeijer, E de Waard, C A M van Bennekom, H Houdijk
BACKGROUND: Knowledge on lower extremity strength is imperative to informed decision making for children with cerebral palsy (CP) with mobility problems. However, a functional and clinically feasible test is not available. We aimed to determine whether the squat test is suitable for this purpose by investigating test performance and execution in children with cerebral palsy and typically developing (TD) peers. METHODS: Squat test performance, defined by the number of two-legged squats until fatigue (max 20), was assessed in twenty children with bilateral CP (6-19years; gross motor function classification system I-III) and sixteen TD children (7-16years)...
December 18, 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/28032253/effect-of-cadence-on-locomotor-respiratory-coupling-during-upper-body-exercise
#9
Nicholas B Tiller, Mike J Price, Ian G Campbell, Lee M Romer
INTRODUCTION: Asynchronous arm-cranking performed at high cadences elicits greater cardiorespiratory responses compared to low cadences. This has been attributed to increased postural demand and locomotor-respiratory coupling (LRC), and yet, this has not been empirically tested. This study aimed to assess the effects of cadence on cardiorespiratory responses and LRC during upper-body exercise. METHODS: Eight recreationally-active men performed arm-cranking exercise at moderate and severe intensities that were separated by 10 min of rest...
December 28, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28018278/the-anatomy-of-action-systems-task-differentiation-when-learning-an-emg-controlled-game
#10
Ludger van Dijk, Anniek Heerschop, Corry K van der Sluis, Raoul M Bongers
This study aims to determine to what extent the task for an action system in its initial development relies on functional and anatomical components. Fifty-two able-bodied participants were randomly assigned to one of three experimental groups or to a control group. As a pre- and post-test all groups performed a computer game with the same goal and using the same musculature. One experimental group also trained to perform this test, while the other two experimental groups learned to perform a game that differed either in its goal or in the musculature used...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/28017171/perineural-dexmedetomidine-effects-on-sciatic-nerve-in-rat
#11
Abdulkadir Yektaş, Murat Çabalar, Mehmet Sar, Ayşin Alagöl, Duygu Sultan Çelik, Vildan Yayla, Deniz Tolga
The present study was designed to test the hypothesis that high dose dexmedetomidine would increase the duration of antinociception to a thermal stimulus in a rat model of sciatic nerve blockade without causing nerve damage. The rats were anesthetized with isoflurane. After electromyography (EMG) recordings, right sciatic nerves were explored and perineural injections were delivered: Group D (n=7), 40μgμgkg(-1) dexmedetomidine administration, Group II (n=6), (0.2mL) saline administration, Group III (n=2), only surgically exploration of the right sciatic nevre...
January 2017: Brazilian Journal of Anesthesiology
https://www.readbyqxmd.com/read/28002180/effect-of-whole-body-vibration-on-neuromuscular-activation-of-leg-muscles-during-dynamic-exercises-in-individuals-with-stroke
#12
Lin-Rong Liao, Marco Yiu Chung Pang
This study examined the leg muscle activity during exposure to different whole-body vibration (WBV) intensities while performing various dynamic exercises in chronic stroke patients. Thirty chronic stroke patients performed a series of dynamic exercises under three conditions: 1) low-intensity WBV [peak acceleration: 0.96 units of gravity of Earth (g)], 2) high-intensity WBV (1.61g), and 3) no WBV (NWBV). Neuromuscular activation was recorded with surface electromyography (EMG) on bilateral biceps femoris (BF), vastus lateralis (VL), tibialis anterior (TA) and gastrocnemius (GS) in both legs and was reported as EMGrms (root mean square) normalized to % maximal voluntary contraction...
December 8, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28000263/reliability-of-surface-facial-electromyography
#13
Ursula Hess, Ruben Arslan, Heidi Mauersberger, Christophe Blaison, Michael Dufner, Jaap J A Denissen, Matthias Ziegler
Data from two studies were used to estimate the reliability of facial EMG when used to index facial mimicry (Study 1) or affective reactions to pictorial stimuli (Study 2). Results for individual muscle sites varied between muscles and depending on data treatment. For difference scores, acceptable internal consistencies were found only for corrugator supercilii, and test-retest reliabilities were low. For contrast measures describing patterns of reactions to stimuli, such as high zygomaticus major combined with low corrugator supercilii, acceptable internal consistencies were found for facial reactions to smiling faces and positive affective reactions to affiliative images (Study 2)...
January 2017: Psychophysiology
https://www.readbyqxmd.com/read/27990243/human-fes-cooperative-control-for-wrist-movement-a-preliminary-study
#14
Kai Gui, Hiroshi Yokoi, Dingguo Zhang
Functional electrical stimulation (FES) sometimes applies to patients with partial paralysis, so human voluntary control and FES control both exist. Our study aims to build a cooperative controller to achieve human-FES cooperation. This cooperative controller is formed by a classical FES controller and an impedance controller. The FES controller consists of a back propagation (BP) neural network-based feedforward controller and a PID-based feedback controller. The function of impedance controller is to convert volitional force/torque, which is estimated from a three-stage filter based on EMG, into additional angle...
June 13, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/27966620/reduced-activation-in-isometric-muscle-action-after-lengthening-contractions-is-not-accompanied-by-reduced-performance-fatigability
#15
W Seiberl, D Hahn, F K Paternoster
After active lengthening contractions, a given amount of force can be maintained with less muscle activation compared to pure isometric contractions at the same muscle length and intensity. This increase in neuromuscular efficiency is associated with mechanisms of stretch-induced residual force enhancement. We hypothesized that stretch-related increase in neuromuscular efficiency reduces fatigability of a muscle during submaximal contractions. 13 subjects performed 60 s isometric knee extensions at 60% of maximum voluntary contraction (MVC) with and without prior stretch (60°/s, 20°)...
December 14, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27965588/unilateral-eccentric-contraction-of-the-plantarflexors-leads-to-bilateral-alterations-in-leg-dexterity
#16
Akira Nagamori, Francisco J Valero-Cuevas, James M Finley
Eccentric contractions can affect musculotendon mechanical properties and disrupt muscle proprioception, but their behavioral consequences are poorly understood. We tested whether repeated eccentric contractions of plantarflexor muscles of one leg affected the dexterity of either leg. Twenty healthy male subjects (27.3 ± 4.0 yrs) compressed a compliant and slender spring prone to buckling with each isolated leg. The maximal instability they could control (i.e., the maximal average sustained compression force, or lower extremity dexterity force, LEDforce) quantified the dexterity of each leg...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27942980/age-differences-in-physiological-responses-to-self-paced-and-incremental-formula-see-text-testing
#17
Lauren A Jenkins, Alexis R Mauger, James G Hopker
PURPOSE: A self-paced maximal exercise protocol has demonstrated higher [Formula: see text] values when compared against traditional tests. The aim was to compare physiological responses to this self-paced [Formula: see text] protocol (SPV) in comparison to a traditional ramp [Formula: see text] (RAMP) protocol in young (18-30 years) and old (50-75 years) participants. METHODS: Forty-four participants (22 young; 22 old) completed both protocols in a randomised, counter-balanced, crossover design...
December 10, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27942868/music-therapy-improves-the-mood-of-patients-undergoing-hematopoietic-stem-cells-transplantation-controlled-randomized-study
#18
REVIEW
Carlos Antonio Dóro, José Zanis Neto, Rosemyriam Cunha, Maribel Pelaez Dóro
PURPOSE: The allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a therapeutic medical treatment for various neoplastic hematologic, congenital, genetic, or acquired disorders. In this procedure which combines high-dose chemotherapy and/or radiotherapy and has a high degree of cytotoxicity, the patient experiences solitary confinement, which causes psychological distress, pain, anxiety, mood disorders and can lead him/her to depression. Music therapy was applied with the purpose of decreasing this social confinement...
December 12, 2016: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/27939701/anger-and-aggression-problems-in-veterans-are-associated-with-an-increased-acoustic-startle-reflex
#19
Lieke Heesink, Rolf Kleber, Michael Häfner, Laury van Bedaf, Iris Eekhout, Elbert Geuze
Anger and aggression are frequent problems in deployed military personnel. A lowered threshold of perceiving and responding to threat can trigger impulsive aggression. This can be indicated by an exaggerated startle response. Fifty-two veterans with anger and aggression problems (Anger group) and 50 control veterans were tested using a startle experiment with 10 startle probes and 10 prepulse trials, presented in a random order and with a random interval between the trials. Predictors (demographics, Trait Anger, State Anger, Harm Avoidance and Anxious Arousal) for the startle response within the Anger group were tested...
December 8, 2016: Biological Psychology
https://www.readbyqxmd.com/read/27935447/lateral-mass-screw-stimulation-thresholds-in-posterior-cervical-instrumentation-surgery-a-predictor-of-medial-deviation
#20
Bayard Wilson, Erik Curtis, Brian Hirshman, Ahmet Oygar, Karen Chen, Brandon C Gabel, Florin Vaida, David W Allison, Joseph D Ciacci
OBJECTIVE Normative data exists for stimulus-evoked pedicle screw electromyography (EMG) current thresholds in the lumbar spine, and is routinely referenced during spine surgeries to detect a screw breach, prevent injury of neural elements, and ensure the most biomechanically sound instrumentation construct. To date, similar normative data for cervical lateral mass screws is limited, thus the utility of lateral mass screw testing remains unclear. To address this disparity, in this study the authors describe cumulative lateral mass screw stimulation threshold data in patients undergoing posterior cervical instrumentation with lateral mass screws...
December 9, 2016: Journal of Neurosurgery. Spine
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