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https://www.readbyqxmd.com/read/28198605/the-effect-of-gymnastic-training-on-muscle-strength-and-co-activation-during-isometric-elbow-and-glenohumeral-flexion-extension
#1
Andrzej Kochanowicz, Bartłomiej Niespodziński, Jan Mieszkowski, Kazimierz Kochanowicz, Stanisław Sawczyn
BACKGROUND: The purpose of the study was to demonstrate the differences between non- athletes and gymnasts at the pre- and post-pubertal age in the development of peak torque and ensuing flexion/extension ratios at the elbow and the glenohumeral joints, as well as to assess the relevance of the above activities for the co-activation of selected muscles. METHODS: The study involved 20 gymnasts and 20 non-athletes aged 8-9 years, in addition to 12 gymnasts and 16 non-athletes aged 18-25 years...
February 14, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28198601/the-effect-of-high-speed-strength-training-with-heavy-and-low-workloads-on-neuromuscular-function-and-maximal-concentric-quadriceps-strength
#2
Ali A Mazani, Mohamed R Hamdinia, Amir H Haghigi, Nosratollah Hedayatpour
BACKGROUND: Dynamic strength training has been widely used to increase the ability of skeletal muscle to produce muscle force. Manipulating resistance training program variables has been commonly used as a tool to optimize maximum strength. This study examined the effects of 12 weeks of high-speed strength training with low and heavy workloads on muscle strength and neuromuscular function of quadriceps muscle. METHODS: Thirty male subjects (age, mean ± SD, 20.6 ± 2...
February 14, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28197354/neuromuscular-coordination-deficit-persists-12-months-after-acl-reconstruction-but-can-be-modulated-by-6-weeks-of-kettlebell-training-a-case-study-in-women-s-elite-soccer
#3
Mette K Zebis, Christoffer H Andersen, Jesper Bencke, Christina Ørntoft, Connie Linnebjerg, Per Hölmich, Kristian Thorborg, Per Aagaard, Lars L Andersen
The aim of the present single-case study was to investigate the effect of 6 weeks' kettlebell training on the neuromuscular risk profile for ACL injury in a high-risk athlete returning to sport after ACL reconstruction. A female elite soccer player (age 21 years) with no previous history of ACL injury went through neuromuscular screening as measured by EMG preactivity of vastus lateralis and semitendinosus during a standardized sidecutting maneuver. Subsequently, the player experienced a noncontact ACL injury...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28194659/activity-of-erector-spinae-during-trunk-forward-bending-and-backward-return-the-effects-of-age
#4
Iman Shojaei, Babak Bazrgari
Electromyography (EMG)-based measures of the trunk muscles behavior have been used for objective assessment of biomechanical impairments in patients with low back pain (LBP); yet the literature on normal age-related differences in such measures is scant. A cross-sectional study was designed to assess age-related differences in activity of trunk extensors during forward bending and backward return. Sixty asymptomatic individuals were recruited to form five gender-balanced age groups between 20 and 70 years old...
February 13, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28192259/impact-of-intraoperative-monitoring-during-elective-complex-spinal-fusions-%C3%A2-4-levels-on-30-day-complication-and-readmission-rates-a-single-institutional-study-of-643-adult-spinal-deformity-patients
#5
Aladine A Elsamadicy, Owoicho Adogwa, Emily Lydon, Gireesh Reddy, Rayan Kaakati, Amanda Sergesketter, Oren N Gottfried, Isaac O Karikari
OBJECTIVE: The aim of this study is to determine if there are differences in 30-day postoperative complication and readmission rates between spinal deformity patients undergoing complex spinal fusion with and without intraoperative monitoring. METHODS: The medical records of 643 adult spine deformity patients undergoing elective complex spinal fusion (≥4 levels) at a major academic institution from 2005 to 2015 were reviewed. We identified 122 (19%) cases that involved intraoperative monitoring (IOM) including EMG, SSEP, and/or TcMEP and 521 (81%) that did not (IOM: n=122; No-IOM: n=521)...
February 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28181788/measuring-effectiveness-of-orthognathic-surgery-by-electromyography-a-restrospective-clinical-study
#6
Giovanni B Grossi, Umberto Garagiola, Franco Santoro
BACKGROUND: This study investigates retrospectively if the initial electromyography (EMG) status of patients who underwent orthognathic surgery correlates with the extent of post-surgical EMG functional recovery. METHODS: Clinical records concerning 20 patients who underwent Le Fort I and/or sagittal osteotomy of the mandibular ramus to correct skeletal dental class III malocclusions were retrieved and pre-surgical and post-surgical EMG data were analyzed and compared...
February 9, 2017: Minerva Stomatologica
https://www.readbyqxmd.com/read/28166121/neural-and-muscular-contributions-to-the-age-related-reductions-in-rapid-strength
#7
Gena R Gerstner, Brennan J Thompson, Joseph G Rosenberg, Eric J Sobolewski, Michael J Scharville, Eric D Ryan
INTRODUCTION: The purpose of this study was to investigate the age-related differences in absolute and normalized plantarflexion rate of torque development (RTD) at early (0-50 ms) and late (100-200 ms) time intervals, and to examine specific neural and muscular mechanisms contributing to these differences. METHODS: Thirty-two young (20.0±2.1 yrs) and 20 older (69.5±3.3 yrs) recreationally active men performed rapid plantarflexion isometric muscle actions to examine absolute and normalized RTD and muscle activation using electromyography (EMG) at early and late time intervals...
February 4, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28160657/patellar-tendon-straps-decrease-pre-landing-quadriceps-activation-in-males-with-patellar-tendinopathy
#8
Adam B Rosen, Jupil Ko, Kathy J Simpson, Cathleen N Brown
OBJECTIVE: To determine if patellar tendon straps altered quadriceps' muscle activity during a drop-jump landing in males with and without patellar tendinopathy. DESIGN: Case-control. SETTINGS: Biomechanics Research Laboratory. PARTICIPANTS: Twenty recreationally-active males participated: ten (age = 21.3 ± 2.4 years, height = 182.8 ± 5.3 cm, mass = 81.7 ± 8.6 kg) with patellar tendinopathy; ten (age = 22...
September 13, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28144413/the-isokinetic-and-electromyographic-assessment-of-knee-muscles-strength-in-the-short-and-long-term-type-2-diabetes
#9
Ahmadreza Askary-Ashtiani, Ali Ghanjal, Monireh Motaqi, Gholam Hossein Meftahi, Boshra Hatef, Hoda Niknam
BACKGROUND: Type 2 diabetes (T2DM) patients are subject to muscle weakness. OBJECTIVES: The aim of the study was an assessment of electromyographic (EMG) activity of knee muscles during isometric maximal voluntary contraction in the different disease durations of T2DM. METHODS: Eighteen patients with less than 10 years and twelve patients with more than 10 years of T2DM were compared with nineteen matched healthy control subjects. EMG of flexor and extensor muscles of knee concurrently with isometric maximal peak torque of knee flexion and extension at 75 degrees of knee flexion were recorded in three groups...
December 2016: Asian Journal of Sports Medicine
https://www.readbyqxmd.com/read/28139104/-animated-biofeedback-for-the-dysfunctional-voiding-syndrome
#10
M Fernández Ibieta, M J Guirao Piñera, G Zambudio Carmona, J Rojas Ticona, I Martínez Castaño, V Villamil, A Sánchez Sánchez, A García López, P Reyes Ríos, J I Ruiz Jiménez
OBJECTIVES: To analyze clinical and electromyographic treatment outcome of dysfunctional voiding (DV) with animated Biofeedback (Bfb). Clinical or electromyographic variables associated with higher success rate were checked. PATIENTS AND METHODS: Cross-sectional study of patients with DV, that in 2010- 2015 followed animated Bfb program. Efficacy was measured with Uroflowmetry, Electromyography (EMG) and validated clinical questionnaire. Inclusion criteria: no myelodysplasia, no anatomical malformations and a minumin of 3 Bfb sessions...
April 10, 2016: Cirugía Pediátrica: Organo Oficial de la Sociedad Española de Cirugía Pediátrica
https://www.readbyqxmd.com/read/28129590/functional-implications-of-muscle-co-contraction-during-gait-in-advanced-age
#11
Justine Lo, On-Yee Lo, Erin A Olson, Daniel Habtemariam, Ikechukwu Iloputaife, Margaret M Gagnon, Brad Manor, Lewis A Lipsitz
Older adults often exhibit high levels of lower extremity muscle co-contraction, which may be the cause or effect of age-related impairments in gait and associated falls. Normal gait requires intact executive function and thus can be slowed by challenging executive resources available to the neuromuscular system through the performance of a dual task. We therefore investigated associations between lower limb co-contraction and gait characteristics under normal and dual task conditions in healthy older adults (85...
January 20, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28129277/differences-in-muscle-activation-and-kinematics-between-cable-based-and-selectorized-weight-training
#12
Joseph F Signorile, Nicole K Rendos, Hector H Heredia Vargas, Taislaine C Alipio, Rebecca C Regis, Moataz M Eltoukhy, Renu S Nargund, Matthew A Romero
Signorile, JF, Rendos, NK, Heredia Vargas, HH, Alipio, TC, Regis, RC, Eltoukhy, MM, Nargund, RS, and Romero, MA. Differences in muscle activation and kinematics between cable-based and selectorized weight training. J Strength Cond Res 31(2): 313-322, 2017-Cable resistance training machines are showing resurgent popularity and allow greater number of degrees of freedom than typical selectorized equipment. Given that specific kinetic chains are used during distinct activities of daily living (ADL), cable machines may provide more effective interventions for some ADL, whereas others may be best addressed using selectorized equipment...
February 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28126647/movement-activated-cortical-myoclonus-in-dravet-syndrome
#13
Laura Canafoglia, Francesca Ragona, Ferruccio Panzica, Elena Piazza, Elena Freri, Simona Binelli, Vidmer Scaioli, Giuliano Avanzini, Tiziana Granata, Silvana Franceschetti
PURPOSE: we characterized multifocal myoclonus in Dravet syndrome (DS) that was never systematically typified before. METHODS: we studied EEG-EMG recordings of 19 consecutive patients, aged 2-29 years, with DS associated with SCN1A gene mutations to detect and evaluate myoclonus based on the spectrum of EMG activity on antagonist muscle pairs and cortico-muscular coherence (CMC). RESULTS: multifocal action myoclonus was detected in all patients corresponding to brief EMG bursts, which occurred synchronously on antagonist muscles at a frequency peaking in beta band...
January 19, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28120463/a-novel-variant-in-the-pygm-gene-causing-late-onset-limb-girdle-myopathy-ptosis-and-camptocormia
#14
Chrystel Chéraud, Roseline Froissart, Béatrice Lannes, Andoni Echaniz-Laguna
INTRODUCTION: McArdle disease is a glycogen storage disease caused by mutations in the PYGM gene encoding myophosphorylase. It manifests classically with childhood-onset exercise-induced pain. METHODS: We report the characteristics of 2 unrelated patients with a new homozygous mutation of the PYGM gene. RESULTS: Two patients, aged 76 and 79 years, presented with severe upper and lower limb atrophy and weakness. Additionally, 1 patient presented with bilateral ptosis, and the other with camptocormia...
January 24, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28118311/acute-effects-of-static-stretching-of-hamstring-on-performance-and-acl-injury-risk-during-stop-jump-and-cutting-tasks-in-female-athletes
#15
Mianfang Ruan, Qiang Zhang, Xie Wu
There is limited research investigating antagonist stretch. The purpose of this study was to evaluate the influence of SSH on performance and ACL injury risk during stop-jump and 180° cutting tasks. Twelve female college athletes (age 20.8 ± 0.7 years; height 1.61 ± 0.05 m; mass 54.25 ± 4.22 kg) participated in this study. Subjects performed stop-jump and 180° cutting tasks under two conditions: after warm-up with 4×30 s SSH or after warm-up without SSH. Three-dimensional kinematic and kinetic data as well as EMG of biceps femoris (BF), rectus femoris (RF), vastus medialis (VM), and gastrocnemius medialis (GM) were collected during testing...
January 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28091345/propofol-as-a-risk-factor-for-icu-acquired-weakness-in-septic-patients-with-acute-respiratory-failure
#16
Peter A Abdelmalik, Goran Rakocevic
BACKGROUND: Critical illness polyneuropathy (CIN) and critical illness myopathy (CIM), together "ICU-Acquired weakness (ICUAW)," occur frequently in septic patients. One of the proposed mechanisms for ICUAW includes prolonged inactivation of sodium channels. Propofol, used commonly in patients with acute respiratory failure (ARF), primarily acts via enhancement of GABAergic transmission but may also increase sodium channel inactivation, suggesting a potential interaction. METHODS: Electronic medical records and EMG reports of patients with ICUAW and a diagnosis of either sepsis, septicaemia, severe sepsis, or septic shock, concurrent with a diagnosis of acute respiratory failure (ARF), were retrospectively analyzed in a single center university hospital...
January 16, 2017: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/28087164/anatomic-study-and-electromyographic-analysis-of-the-teres-minor-muscle
#17
Junichiro Hamada, Akimoto Nimura, Kunio Yoshizaki, Keiichi Akita
BACKGROUND: The teres minor muscle is a focused topic on the treatment of massive rotator cuff tears and reverse total shoulder arthroplasty. Its precise anatomy and function have not been completely investigated. The purposes of this study were to anatomically investigate the muscle and analyze electromyographic (EMG) activities during shoulder motion. METHODS: This anatomic study used 20 shoulders from deceased donors (mean age, 75.0 years). EMG data were recorded from 10 healthy volunteers (mean age, 21...
January 10, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28078360/multimodal-nerve-monitoring-during-periacetabular-osteotomy-identifies-surgical-steps-associated-with-risk-of-injury
#18
Eduardo N Novais, Travis Heare, Lauryn Kestel, Patricia Oliver, Willy Boucharel, Jason Koerner, Kim Strupp
PURPOSE: Sciatic nerve palsy after periacetabular osteotomy (PAO) is a serious complication. The purpose of this study was to determine whether a multimodal sciatic monitoring technique allows for identification of surgical steps that place the sciatic nerve at risk. METHODS: Transcranial electrical motor evoked potentials (TcMEPs), somatosensory evoked potentials (SSEPs), and spontaneous electromyography (EMG) were monitored in a consecutive series of 34 patients (40 hips) who underwent PAO for the treatment of symptomatic hip dysplasia between January 2012 and November 2014...
January 11, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28077666/motor-plan-differs-for-young-and-older-adults-during-similar-movements
#19
Agostina Casamento Moran, Yen-Ting Chen, Neha Lodha, Basma Yacoubi, Evangelos A Christou
Older adults exhibit altered activation of the agonist and antagonist muscles during goal-directed movements compared with young adults. However, it remains unclear whether the differential activation of the antagonistic muscles in older adults results from an impaired motor plan or an altered ability of the muscle to contract. The purpose of this study, therefore, was to determine whether the motor plan differs for young and older adults. Ten young (26.1 ± 4.3 yrs, 4 females) and sixteen older (71.9 ± 6...
January 11, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28072633/visual-motion-processing-subserves-faster-visuomotor-reaction-in-badminton-players
#20
Thorben Hülsdünker, Heiko K Strüder, Andreas Mierau
INTRODUCTION: Athletes participating in ball or racquet sports have to respond to visual stimuli under critical time pressure. Previous studies used visual contrast stimuli to determine visual perception and visuomotor reaction in athletes and non-athletes however, especially ball and racquet sports are characterized by motion rather than contrast visual cues. Since visual contrast and motion signals are processed in different cortical regions, this study aimed to determine differences in perception and processing of visual motion between athletes and non-athletes...
January 9, 2017: Medicine and Science in Sports and Exercise
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