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https://www.readbyqxmd.com/read/28194098/spatiotemporal-profiles-of-proprioception-processed-by-the-masseter-muscle-spindles-in-rat-cerebral-cortex-an-optical-imaging-study
#1
Satoshi Fujita, Mari Kaneko, Hiroko Nakamura, Masayuki Kobayashi
Muscle spindles in the jaw-closing muscles, which are innervated by trigeminal mesencephalic neurons (MesV neurons), control the strength of occlusion and the position of the mandible. The mechanisms underlying cortical processing of proprioceptive information are critical to understanding how sensory information from the masticatory muscles regulates orofacial motor function. However, these mechanisms are mostly unknown. The present study aimed to identify the regions that process proprioception of the jaw-closing muscles using in vivo optical imaging with a voltage-sensitive dye in rats under urethane anesthesia...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/28168524/functional-impairment-in-patients-with-myotonic-dystrophy-type-1-can-be-assessed-by-an-ataxia-rating-scale-sara
#2
Giovanni DiPaolo, Cecilia Jimenez-Moreno, Nikoletta Nikolenko, Antonio Atalaia, Darren G Monckton, Michela Guglieri, Hanns Lochmüller
Myotonic dystrophy type 1 (DM1) is not characterised by ataxia per se; however, DM1 and ataxia patients show similar disturbances in movement coordination often experiencing walking and balance difficulties, although caused by different underlying pathologies. This study aims to investigate the use of a scale previously described for the assessment and rating of ataxia (SARA) with the hypothesis that it could have utility in DM1 patients as a measure of disease severity and risk of falling. Data from 54 DM1 patients were pulled from the PHENO-DM1 natural history study for analysis...
February 6, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28125910/biceps-disorder-rehabilitation-for-the-athlete
#3
Dorien Borms, Inge Ackerman, Pieter Smets, Glen Van den Berge, Ann M Cools
BACKGROUND: Progressive biceps loading is recommended in the nonoperative and operative rehabilitation of biceps-related disorders. Previous researchers have proposed a continuum of exercises with low to moderate biceps loads to be used in the early and intermediate phases of rehabilitation. A progression of exercises with moderate to high biceps loads to be used in the more advanced phases of rehabilitation is lacking. PURPOSE: To describe a progression of exercises with progressive moderate to high loads on the biceps brachii (BB) based on electromyographic (EMG) analysis...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28124107/the-interaction-between-the-vastus-medialis-and-vastus-intermedius-and-its-influence-on-the-extensor-apparatus-of-the-knee-joint
#4
Karl Grob, Mirjana Manestar, Luis Filgueira, Markus S Kuster, Helen Gilbey, Timothy Ackland
PURPOSE: Although the vastus medialis (VM) is closely associated with the vastus intermedius (VI), there is a lack of data regarding their functional relationship. The purpose of this study was to investigate the anatomical interaction between the VM and VI with regard to their origins, insertions, innervation and function within the extensor apparatus of the knee joint. METHODS: Eighteen human cadaveric lower limbs were investigated using macro-dissection techniques...
January 25, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28118310/ratings-of-perceived-exertion-during-acute-resistance-exercise-performed-at-imposed-and-self-selected-loads-in-recreationally-trained-women
#5
Joshua A Cotter, Matthew J Garver, Taylor K Dinyer, Ciaran M Fairman, Brian C Focht
Resistance exercise (RE) is commonly employed to elicit skeletal muscle adaptation. Relative intensity of a training load links closely with the outcomes of regular RE. This study examined the RPE responses to acute bouts of RE using imposed (40% and 70% of 1RM) and self-selected loads (SS) in recreationally trained women. Twenty physically active women (23.15 ±2.92 yrs.) who reported regular RE training of at least three weekly sessions for the past year, volunteered to participate. During the initial visit, participants completed one repetition maximum (1RM) testing on four exercises in the following order: leg extension, chest press, leg curl, and lat pull-down...
January 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28090144/maximal-power-training-induced-different-improvement-in-throwing-velocity-and-muscle-strength-according-to-playing-positions-in-elite-male-handball-players
#6
M Cherif, H Chtourou, N Souissi, A Aouidet, K Chamari
This study was designed to assess the effect of strength and power training on throwing velocity and muscle strength in handball players according to their playing positions. Twenty-two male handball players were assigned to either an experimental group (n=11) or a control group (n=11) (age: 22.1 ± 3.0 years). They were asked to complete (i) the ball throwing velocity test and (ii) the one-repetition maximum (1-RM) tests for the half-back squat, the pull-over, the bench press, the developed neck, and the print exercises before and after 12 weeks of maximal power training...
December 2016: Biology of Sport
https://www.readbyqxmd.com/read/28087137/nos-interacting-protein-nosip-is-increased-in-the-colon-of-patients-with-hirschsprung-s-disease
#7
Anne-Marie O'Donnell, David Coyle, Prem Puri
PURPOSE: Voltage-dependent K(+) channels (Kv channels) participate in electrical rhythmicity and smooth muscle responses and are regulated by excitatory and inhibitory neurotransmitters. Kv channels also participate in the interstitial cell of Cajal (ICC) and smooth muscle cell (SMC) responses to neural inputs. The Kv family consists of 12 subfamilies, Kv1-Kv12, with five members of the Kv7 family identified to date: Kv7.1-Kv7.5. A recent study identified the potassium channel Kv7.5 as having a role in the excitability of ICC-IM in the mouse colon...
January 3, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28065717/muscle-complex-saving-posterior-sagittal-anorectoplasty
#8
Maher Zaiem, Feras Zaiem
INTRODUCTION: Posterior sagittal anorectoplasty (PSARP) published by DeVries and Peña in 1982 had become the preferred surgical technique for the management of anorectal malformations (ARM). The original technique is based upon complete exposure of the anorectal region by means of a median sagittal incision that runs from the sacrum to the anal dimple, cutting through all muscle structures behind the rectum by dividing the levator muscle and the muscle complex. Then, the rectum is located in front of the levator and within the limits of the muscle complex...
December 27, 2016: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28011412/electromyographic-analysis-of-muscle-activation-during-pull-up-variations
#9
James A Dickie, James A Faulkner, Matthew J Barnes, Sally D Lark
This study sought to identify any differences in peak muscle activation (EMGPEAK) or average rectified variable muscle activation (EMGARV) during supinated grip, pronated grip, neutral grip and rope pull-up exercises. Nineteen strength trained males (24.9±5y; 1.78±0.74m; 81.3±11.3kg; 22.7±2.5kgm(-2)) volunteered to participate in the study. Surface electromyography (EMG) was collected from eight shoulder-arm-forearm complex muscles. All muscle activation was expressed as a percentage of maximum voluntary isometric contraction (%MVIC)...
February 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28008617/n-cadherin-a-novel-and-rapidly-remodelling-site-involved-in-vasoregulation-of-small-cerebral-arteries
#10
Zhe Sun, Min Li, Zhaohui Li, Michael A Hill, Gerald A Meininger
N-cadherin is the major cell-cell adhesion molecule in vascular smooth muscle cells (VSMC). We tested the hypothesis that N-cadherin is part of a novel mechano-sensory mechanism in VSMC and plays an active role in both the arteriolar myogenic response and during changes in vascular tone induced by vasomotor agonists. Intact and pressurized rat superior cerebellar arteries (SCA) were labelled for confocal immunofluorescence imaging. N-cadherin formed punctate adherens junctions (AJ) along the borders between VSMC...
December 23, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/28005653/anatomy-of-the-corrugator-muscle
#11
Kun Hwang, Jung Hun Lee, Hee Joong Lim
The aim of this article is to systematically review the anatomy and action of the corrugator muscle. PubMed and Scopus were searched using the terms "corrugator" AND "anatomy." Among the 60 full texts from the 145 relevant abstracts, 34 articles without sufficient content were excluded and 4 articles drawn from the reference lists were added. Among the 30 articles analyzed (721 hemifaces), 28% classified by oblique head and transverse head, and 72% did not. Corrugator originated mostly from the medial supraorbital rim (45%), followed by the medial frontal bone (31%), the medial infraorbital rim (17%), and the upper nasal process (7%)...
December 21, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27995220/standardized-4-step-technique-of-bladder-neck-dissection-during-robot-assisted-radical-prostatectomy
#12
REVIEW
Mansour Alnazari, Marc Zanaty, Emad Rajih, Assaad El-Hakim, Kevin C Zorn
Bladder neck (BN) dissection is considered one of the most challenging steps during robot-assisted radical prostatectomy. Better understanding of the BN anatomy, coupled with a standardized approach may facilitate dissection while minimizing complications. We describe in this article the 4 anatomic spaces during standardized BN dissection, as well other technical maneuvers of managing difficult scenarios including treatment of a large median lobe or patients with previous transurethral resection of the prostate...
December 2016: Investigative and Clinical Urology
https://www.readbyqxmd.com/read/27974423/vegf165b-modulates-endothelial-vegfr1-stat3-signaling-pathway-and-angiogenesis-in-human-and-experimental-peripheral-arterial-disease
#13
Vijay Chaitanya Ganta, Min Choi, Anna Kutateladze, Brian H Annex
RATIONALE: Atherosclerotic-arterial occlusions decrease tissue perfusion causing ischemia to lower limbs in patients with peripheral arterial disease (PAD). Ischemia in muscle induces an angiogenic response, but the magnitude of this response is frequently inadequate to meet tissue perfusion requirements. Alternate splicing in the exon-8 of vascular endothelial growth factor (VEGF)-A results in production of proangiogenic VEGFxxxa isoforms (VEGF165a, 165 for the 165 amino acid product) and antiangiogenic VEGFxxxb (VEGF165b) isoforms...
January 20, 2017: Circulation Research
https://www.readbyqxmd.com/read/27941492/effects-of-a-modified-german-volume-training-program-on-muscular-hypertrophy-and-strength
#14
Theban Amirthalingam, Yorgi Mavros, Guy C Wilson, Jillian L Clarke, Lachlan Mitchell, Daniel A Hackett
German Volume Training (GVT), or the 10 sets method, has been used for decades by weightlifters to increase muscle mass. To date, no study has directly examined the training adaptations following GVT. The purpose of this study was to investigate the effect of a modified GVT intervention on muscular hypertrophy and strength. Nineteen healthy males were randomly assign to 6 weeks of 10 or 5 sets of 10 repetitions for specific compound resistance exercises included in a split-routine performed 3 times per week...
November 25, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27930604/an-automated-expanded-polytetrafluoroethylene-suturing-and-coaxial-fastener-system-for-mitral-chordae-replacement-strength-feasibility-and-healing
#15
Candice Y Lee, Joshua K Wong, Jude S Sauer, Heather R Gorea, Angelo J Martellaro, Andrew R Sifain, Peter A Knight
OBJECTIVE: Mitral valve (MV) chordae replacements can be technically challenging. Technology that remotely delivers and accurately secures artificial chordae may reduce the learning curve and improve the reliability of MV repairs. METHODS: The technology involved two devices: a remote suturing device for delivery of expanded polytetrafluoroethylene (ePTFE) suture to the papillary muscle and a Coaxial titanium suture fastener (TF) device with integrated saline infusion for real-time determination of chordae length during fixation...
November 2016: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/27916369/expression-of-connexin-26-and-connexin-43-is-reduced-in-hirschsprung-s-disease
#16
David Coyle, Brian Doyle, Justin M Murphy, Anne Marie O'Donnell, John Gillick, Prem Puri
BACKGROUND: Despite having an optimal pull-through operation, some children with Hirschsprung's disease (HSCR) continue to experience persistent bowel symptoms. Coordinated colonic electrical activity depends on intercellular communication between the enteric nerves, interstitial cells of Cajal (ICCs), smooth muscle cells, and fibroblast-like (platelet-derived growth factor receptor-alpha-positive) cells. Gap junctions are low-resistance channels composed of connexin (Cx) proteins which couple cells electrically and chemically...
November 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27863277/vitamin-d-supplementation-affects-the-igf-system-in-men-after-acute-exercise
#17
Rachel L Darr, Kathleen J Savage, Mark Baker, Gregory E Wilding, Amy Raswalsky, Todd Rideout, Richard W Browne, Peter J Horvath
OBJECTIVE: Contradictory data between the Insulin-Like Growth Factor System (IGF) system and exercise may be due to alteration in IGF binding proteins. Vitamin D (D) deficiency has been related to muscle weakness and Insulin Like Growth Factor Binding Protein 3 (IGFBP3). A Vit. D and acute exercise merge is proposed to modify the IGF system. DESIGN: D insufficient and deficient men (39.0±8.6yo with serum D (25OH D) 20.0±7.7ng/mL) did 1h of stretching (ST), aerobic (AB), and resistance (RT) exercises, before and after 28d of 4000IU/d Vit...
October 2016: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/27826394/effect-of-exercise-order-of-resistance-training-on-strength-performance-and-indices-of-muscle-damage-in-young-active-girls
#18
Maydeye Nazari, Mohammad Ali Azarbayjani, Kamal Azizbeigi
BACKGROUND: Exercise order is one of the key variables in designing resistance training (RT) that may affect physiological and functional muscle characteristics. OBJECTIVES: The purpose of this research was to examine the effect of exercise order of RT on muscle strength, lactate dehydrogenase (LDH) and creatine kinase (CK) enzymes as indices of muscle damage in active young girls. PATIENTS AND METHODS: For this purpose, 24 active girls aged 20 - 30 years voluntarily participated in six weeks RT...
September 2016: Asian Journal of Sports Medicine
https://www.readbyqxmd.com/read/27815011/impact-of-arthroscopic-lateral-acromioplasty-on-the-mechanical-and-structural-integrity-of-the-lateral-deltoid-origin-a-cadaveric-study
#19
Daniel Cole Marchetti, J Christoph Katthagen, Jacob D Mikula, Scott R Montgomery, Dimitri S Tahal, Kimi D Dahl, Travis Lee Turnbull, Peter J Millett
PURPOSE: To determine whether a 5-mm and/or 10-mm arthroscopic lateral acromioplasty (ALA) would weaken the structural and mechanical integrity of the lateral deltoid. METHODS: The acromion and lateral deltoid origin were harvested from 15 pairs (n = 30) of fresh-frozen human cadaveric shoulder specimens. One side of each specimen pair (left or right) was randomly assigned to either a 5-mm (n = 7) or 10-mm (n = 8) ALA group, and the contralateral sides (n = 15) were used as matched controls...
November 1, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27799576/accommodative-et-high-ac-a-ratio-esotropia-the-case-for-glasses
#20
Edward L Raab
BACKGROUND AND PURPOSE: There is a continuing debate as to whether the patient optically correctable at distance to within 8 prism diopters of perfect alignment requires treatment for persisting overconvergence at near, and if treatment is indicated, what it should be. PATIENTS AND METHODS: For the patient whose misalignment at distance is reduced to 8 or fewer prism diopters, my preference is for the full cycloplegic correction plus a bifocal in the first prescription, to discourage virtually all accommodation initially, with pull back later...
January 2016: American Orthoptic Journal
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