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Electromyography

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https://www.readbyqxmd.com/read/29656221/patellar-malalignment-treated-with-modified-knee-extension-training-an-electromyography-study
#1
Chi-Chuan Wu, Mei-Chuan Chen, Po-Yuan Tseng, Chi-Heng Lu, Chiu-Ching Tuan
BACKGROUND: Patellar malalignment (PM) in most patients is ascribed to an imbalance of peripatellar soft tissue tension. RESEARCH QUESTION: Conservative treatment of PM initially with enforced training of the vastus medialis obliquus (VMO) has been widely applied. Non-operative techniques for treatment of PM require continuing development. METHODS: Thirty healthy young adults participated in the study. Two surface electromyography (EMG) electrodes were placed on the skin of the dominant lower thigh in each subject: one on the center of the muscle belly of the VMO and the other on the symmetric location of the vastus lateralis (VL)...
April 6, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29655449/diagnosis-of-myasthenia-gravis
#2
REVIEW
Mamatha Pasnoor, Mazen M Dimachkie, Constantine Farmakidis, Richard J Barohn
Myasthenia gravis (MG) diagnosis is primarily clinically based. By the end of the clinical evaluation, clinicians have a sense as to whether presenting symptoms and elicited signs are weakly or strongly supportive of MG. Diagnostic tests can reaffirm the clinicians' impression. Edrophonium testing is rarely used but helpful in cases of measurable ptosis. Decremental response on slow-frequency repetitive nerve stimulation has a modest diagnostic yield in ocular MG but is helpful in generalized MG cases. The most sensitive test is single-fiber electromyography...
May 2018: Neurologic Clinics
https://www.readbyqxmd.com/read/29653340/magnitude-and-variability-of-gait-characteristics-when-walking-on-an-irregular-surface-at-different-speeds
#3
Stephanie Blair, Mark J Lake, Rui Ding, Thorsten Sterzing
Different modes of perturbations have been used to understand how individuals negotiate irregular surfaces, with a general notion that increased locomotion variability induces a positive training stimulus. Individuals tend to walk slower when initially exposed to such locomotion tasks, potentially influencing the magnitude and variability of biomechanical parameters. This study investigated theeffects of gait speed on lower extremity biomechanics when walking on an irregular (IS) and regular surface (RS). Twenty physically active males walked on a RS and IS at three different speeds (4 km/h, 5 km/h, 6 km/h)...
April 10, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29653187/mid-cervical-spinal-cord-contusion-causes-robust-deficits-in-respiratory-parameters-and-pattern-variability
#4
Philippa M Warren, Cara Campanaro, Frank J Jacono, Warren J Alilain
Mid-cervical spinal cord contusion disrupts both the pathways and motoneurons vital to the activity of inspiratory muscles. The present study was designed to determine if a rat contusion model could result in a measurable deficit to both ventilatory and respiratory motor function under "normal" breathing conditions at acute to chronic stages post trauma. Through whole body plethysmography and electromyography we assessed respiratory output from three days to twelve weeks after a cervical level 3 (C3) contusion...
April 10, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29652835/fabrication-of-flexible-microneedle-array-electrodes-for-wearable-bio-signal-recording
#5
Lei Ren, Shujia Xu, Jie Gao, Zi Lin, Zhipeng Chen, Bin Liu, Liang Liang, Lelun Jiang
Laser-direct writing (LDW) and magneto-rheological drawing lithography (MRDL) have been proposed for the fabrication of a flexible microneedle array electrode (MAE) for wearable bio-signal monitoring. Conductive patterns were directly written onto the flexible polyethylene terephthalate (PET) substrate by LDW. The microneedle array was rapidly drawn and formed from the droplets of curable magnetorheological fluid with the assistance of an external magnetic field by MRDL. A flexible MAE can maintain a stable contact interface with curved human skin due to the flexibility of the PET substrate...
April 13, 2018: Sensors
https://www.readbyqxmd.com/read/29652243/dorsal-rhizotomy-for-children-with-spastic-diplegia-of-cerebral-palsy-origin-usefulness-of-intraoperative-monitoring
#6
George Georgoulis, Andrei Brînzeu, Marc Sindou
OBJECTIVE The utility of intraoperative neuromonitoring (ION), namely the study of muscle responses to radicular stimulation, remains controversial. The authors performed a prospective study combining ventral root (VR) stimulation for mapping anatomical levels and dorsal root (DR) stimulation as physiological testing of metameric excitability. The purpose was to evaluate to what extent the intraoperative data led to modifications in the initial decisions for surgical sectioning established by the pediatric multidisciplinary team (i...
April 13, 2018: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29651252/intra-session-and-inter-day-reliability-of-the-myon-320-electromyography-system-during-sub-maximal-contractions
#7
Graeme G Sorbie, Michael J Williams, David W Boyle, Alexander Gray, James Brouner, Neil Gibson, Julien S Baker, Chris Easton, Ukadike C Ugbolue
Electromyography systems are widely used within the field of scientific and clinical practices. The reliability of these systems are paramount when conducting research. The reliability of Myon 320 Surface Electromyography System is yet to be determined. This study aims to determine the intra-session and inter-day reliability of the Myon 320 Surface Electromyography System. Muscle activity from fifteen participants was measured at the anterior deltoid muscle during a bilateral front raise exercise, the vastus lateralis muscle during a squat exercise and the extensor carpi radialis brevis (ECRB) muscle during an isometric handgrip task...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29649451/associations-between-muscle-synergies-and-treatment-outcomes-in-cerebral-palsy-are-robust-across-clinical-centers
#8
Benjamin R Shuman, Marije Goudriaan, Kaat Desloovere, Michael H Schwartz, Katherine M Steele
OBJECTIVE: To determine whether patient-specific differences in motor control quantified using muscle synergy analysis were associated with changes in gait after treatment in cerebral palsy across two clinical centers with different treatments and clinical protocols. DESIGN: Retrospective Cohort Study. SETTING: Clinical Medical Center. PARTICIPANTS: Center 1: 473 children with cerebral palsy and 84 typically-developing children...
April 9, 2018: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29648522/the-impact-of-recurrent-laryngeal-nerve-lesion-on-oropharyngeal-muscle-activity-and-sensorimotor-integration-in-an-infant-pig-model
#9
Katherine R DeLozier, Francois David Henry Gould, Jocelyn Ohlemacher, Allan J Thexton, Rebecca Z German
The successful performance of a swallow requires dynamic integration, between a wide range of sensory inputs and muscle activities, to produce the coordinated kinematics of oropharyngeal structures. Damage to the recurrent laryngeal nerve (RLN) produces dysphagia in infants, with food or liquid entering the airway, despite this nerve having minimal direct sensory or motor connections to the act of swallowing, apart from vocal fold closure. Previous results have demonstrated that a complete RLN lesion disrupts both performance and kinematics prior to initiation of the pharyngeal swallow in infants...
April 12, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29644392/effect-of-a-rest-pause-vs-traditional-squat-on-electromyography-and-lifting-volume-in-trained-women
#10
John A Korak, Max R Paquette, Dana K Fuller, Jennifer L Caputo, John M Coons
PURPOSE: Rest-pause (4 s unloaded rest between repetitions) single session training effects on lifting volume, and muscle activity via electromyography (EMG) are currently vague in the literature and can benefit strength and conditioning professionals for resistance training program design. This study compared differences in volume lifted and muscle activity between a rest-pause vs. traditional protocol. METHODS: Trained females (N = 13) completed both a rest-pause and traditional squat protocol consisting of four sets to movement failure at 80% pretest 1 repetition maximum load with 2-min rest between sets...
April 11, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29644085/protein-molecular-modeling-shows-residue-t599-is-critical-to-wild-type-function-of-polg-and-description-of-a-novel-variant-associated-with-the-sando-phenotype
#11
John E Richter, Hector G Robles, Elizabeth Mauricio, Ahmed Mohammad, Paldeep S Atwal, Thomas R Caulfield
Sensory ataxic neuropathy with dysarthria and ophthalmoparesis (SANDO) is a rare phenotype resulting from pathogenic variants of mitochondrial DNA polymerase gamma ( POLG ). We modeled a novel POLG variant, T599P, that causes the SANDO phenotype and another variant at the same residue, p.T599E, to observe their effect on protein function and confirm the pathogenicity of T599P. Through neoteric molecular modeling techniques, we show that changes at the T599 residue position introduce extra rigidity into the surrounding helix-loop-helix, which places steric pressure on nearby nucleotides...
2018: Human Genome Variation
https://www.readbyqxmd.com/read/29643591/immediate-effect-of-transcranial-direct-current-stimulation-combined-with-functional-electrical-stimulation-on-activity-of-the-tibialis-anterior-muscle-and-balance-of-individuals-with-hemiparesis-stemming-from-a-stroke
#12
Aline Marina Alves Fruhauf, Fabiano Politti, Simone Dal Corso, Gláucio Carneiro Costa, Amanda da Conceição Teodósio, Soraia Micaela Silva, João Carlos Ferrari Corrêa, Fernanda Ishida Corrêa
[Purpose] The aim of the present study was to evaluate the immediate effects of transcranial direct current stimulation (tDCS) and functional electrical stimulation (FES) on activity of the tibialis anterior muscle (TA) and static balance of individuals with hemiparesis stemming from stroke. [Subjects and Methods] A randomized, double-blind, crossover, clinical trial conducted with 30 individuals with chronic post-stroke hemiparesis. Median frequency of electrical activity of the TA were determined using electromyography in five contractions concentrics and Static balance (body sway velocity and frequency), both before and immediately after the intervention...
December 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29643585/electromyographic-evaluation-of-a-low-level-laser-protocol-for-the-treatment-of-temporomandibular-disorder-a-randomized-controlled-blind-trial
#13
Camila Haddad Leal de Godoy, Lara Jansiski Motta, Eugenio Jose Garcia, Kristianne Porta Santos Fernandes, Raquel Agnelli Mesquita-Ferrari, Ravana Angelini Sfalcin, Pamella de Barros Motta, Fabiano Politti, Sandra Kalil Bussadori
[Purpose] Problems involving the temporomandibular joint and associated structures can lead to temporomandibular disorder (TMD). The aim of the present study was to evaluate muscle activity in individuals with a diagnosis of TMD before and after treatment with low-level laser therapy (LLLT) through the use of electromyography (EMG). [Subjects and Methods] Male and female individuals aged 14 to 23 years were evaluated. TMD was determined by a clinical examination and the administration of the Research Diagnostic Criteria for Temporomandibular Disorders, followed by the evaluation of sensitivity to palpation of the masseter and anterior temporal muscles as well as the EMG determination of muscle activity...
December 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29642921/feasibility-of-robot-based-perturbed-balance-training-during-treadmill-walking-in-a-high-functioning-chronic-stroke-subject-a-case-control-study
#14
Zlatko Matjačić, Matjaž Zadravec, Andrej Olenšek
BACKGROUND: For stroke survivors, balance deficits that persist after the completion of the rehabilitation process lead to a significant risk of falls. We have recently developed a balance-assessment robot (BAR-TM) that enables assessment of balancing abilities during walking. The purpose of this study was to test feasibility of using the BAR-TM in an experimental perturbed-balance training program with a selected high-functioning stroke survivor. METHODS: A control and an individual with right-side chronic hemiparesis post-stroke were studied...
April 11, 2018: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29629614/physical-impairments-in-adults-with-ankle-osteoarthritis-a-systematic-review-and-meta-analysis
#15
Munira Mohammed Al-Mahrouqi, David Allan MacDonald, Bill Vicenzino, Michelle Dawn Smith
Study Design Systematic review with meta-analysis. Background Lower limb osteoarthritis (OA) is associated with pain and reduced function. Most research focusses on hip and knee OA related impairments and as consequence impairments that characterise ankle OA are not well understood. Objective To systematically review available evidence of physical impairments in individuals with ankle OA. Methods A comprehensive search of electronic databases was conducted up until July 2017. Studies were screened using pre-defined inclusion/exclusion criteria...
April 7, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29628967/augmentation-of-respiratory-muscle-activities-in-preterm-infants-with-feeding-desaturation
#16
Dong Rak Kwon, Gi Young Park, Ji Eun Jeong, Woo Taek Kim, Eun Joo Lee
Purpose: Frequent desaturation due to immature incoordination of suck-swallow-breathing in preterm infants can influence multiple organs such as the heart, lungs, and brain, which can then affect growth and development. Most notably in preterm infants, feeding desaturation may even affect pulmonary function during gavage feeding. Because respiratory muscle activities may reflect the work required during respiration, we evaluated the differences in these activities between full-term and preterm infants with feeding desaturation, and investigated the correlations with clinical variables...
March 2018: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/29628010/initial-electromyography-fails-to-predict-long-term-outcome-of-isolated-serratus-palsy
#17
M Vastamäki, H Vastamäki, V Pikkarainen, L Ristolainen
BACKGROUND AND AIMS: The course of isolated serratus palsy is difficult to predict, especially if, in initial electromyographic examination, long thoracic nerve function is totally absent. How initial electromyography correlates with long-term outcome of isolated serratus palsy is unknown. We evaluated initial electromyographic examinations of isolated serratus palsy patients and compared these to their long-term outcome. We hypothesized that long-term outcome after electromyographic examination-verified partial nerve injuries is better than that seen in cases of total nerve injuries...
April 1, 2018: Scandinavian Journal of Surgery: SJS
https://www.readbyqxmd.com/read/29625866/mixed-facial-reanimation-technique-to-treat-paralysis-in-medium-term-cases
#18
Federico Biglioli, Federico Bolognesi, Fabiana Allevi, Dimitri Rabbiosi, Silvia Cupello, Antonino Previtera, Alessandro Lozza, Valeria M A Battista, Claudio Marchetti
Recent facial paralyses, in which fibrillations of the mimetic muscles are still detectable by electromyography (EMG), allow facial reanimation based on giving new neural stimuli to musculature. However, if more time has elapsed, mimetic muscles can undergo irreversible atrophy, and providing a new neural stimulus is simply not effective. In these cases function is provided by transferring free flaps into the face or transposing masticatory muscles to reinstitute major movements, such as eyelid closure and smiling...
March 14, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29625573/long-term-consistency-and-location-specificity-of-equine-gluteus-medius-muscle-activity-during-locomotion-on-the-treadmill
#19
Rebeka R Zsoldos, Anna Voegele, Bjoern Krueger, Ulrike Schroeder, Andreas Weber, Theresia F Licka
BACKGROUND: The equine m. gluteus medius (GM) is the largest muscle of the horse, its main movement function is the extension of the hip joint. The objective of the present study was to measure equine GM activity in three adjacent locations on GM during walk and trot on a treadmill, in order to document potential differences. Fourteen Haflinger mares were measured using surface electromyography and kinematic markers to identify the motion cycles on three occasions over 16 weeks. The electrodes were placed on left and right gluteus medius muscle over the middle of its widest part and 5 cm lateral and medial of it...
April 6, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29625190/sacroiliac-joint-dysfunction-patients-exhibit-altered-movement-strategies-when-performing-a-sit-to-stand-task
#20
Robyn A Capobianco, Daniel F Feeney, Jana R Jeffers, Erika Nelson-Wong, Joseph Morreale, Alena M Grabowski, Roger M Enoka
OF BACKGROUND DATA: The ability to rise from a chair is a basic functional task that is frequently compromised in individuals diagnosed with orthopedic disorders in the low back and hip. There is no published literature that describes how this task is altered by sacroiliac joint dysfunction (SIJD). PURPOSE: To compare lower extremity biomechanics and the onset of muscle activity when rising from a chair in individuals with SIJD and healthy persons. STUDY DESIGN: Six women with unilateral SIJD and six age-matched healthy controls performed a sit-to-stand task while we measured kinematics, kinetics, and muscle activity...
April 3, 2018: Spine Journal: Official Journal of the North American Spine Society
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