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Muscular injuries

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https://www.readbyqxmd.com/read/27913924/shear-wave-elastography-reveals-different-degrees-of-passive-and-active-stiffness-of-the-neck-extensor-muscles
#1
Angela V Dieterich, Ricardo J Andrade, Guillaume Le Sant, Deborah Falla, Frank Petzke, François Hug, Antoine Nordez
PURPOSE: The neck extensor muscles contribute to spinal support and posture while performing head and neck motion. Muscle stiffness relates to passive elasticity (support) and active tensioning (posture and movement) of muscle. It was hypothesized that support and motion requirements are reflected in the distribution of stiffness between superficial and deep neck extensor muscles. METHODS: In ten healthy participants, shear modulus (stiffness) of five neck extensor muscles was determined in prone at rest and during isometric head lift at three intensities using shear wave elastography...
December 2, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27913649/identification-and-function-of-fibrocytes-in-skeletal-muscle-injury-repair-and-muscular-dystrophy
#2
Xingyu Wang, Wanming Zhao, Richard M Ransohoff, Lan Zhou
We identified and characterized the function of CD45(+)/collagen I(+) fibrocytes in acutely injured skeletal muscle of wild-type (WT) and Ccr2(-/-) mice, and in quadriceps and diaphragm muscles of mdx(5cv) mice, a mouse model for Duchenne muscular dystrophy. Fibrocytes were not detected in peripheral blood of WT mice after acute muscle injury or mdx(5cv) mice. Fibrocytes were detected in acutely injured muscles and in mdx(5cv) quadriceps and diaphragm muscles. These cells expressed F4/80 and CCR2, and they were mostly Ly6C(lo) They expressed a low level of collagens but a high level of profibrotic growth factors as compared with i...
December 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27908914/muscle-mania-the-quest-for-the-perfect-body
#3
Maira Hameed, Ajay Sahu, Maria B Johnson
We describe the case of a young man with repeated hospital presentations for a variety of symptoms related to excessive bodybuilding and associated behaviours. He presented to our department (radiology) with right arm pain and loss of function. Ultrasound showed complete triceps rupture, rare in young patients and multiple cystic areas within the muscles of the arm. MRI revealed these to be multiple proteinaceous lesions within the muscle bellies and the possibility of self-innoculation was raised by the reporting radiologist...
December 1, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27908613/sparc-interacts-with-actin-in-skeletal-muscle-in%C3%A2-vitro-and-in%C3%A2-vivo
#4
Louise H Jørgensen, Pia Lørup Jepsen, Anders Boysen, Line B Dalgaard, Lars G Hvid, Niels Ørtenblad, Dea Ravn, Jeeva Sellathurai, Jakob Møller-Jensen, Hanns Lochmüller, Henrik D Schrøder
The cytoskeleton is an integral part of skeletal muscle structure, and reorganization of the cytoskeleton occurs during various modes of remodeling. We previously found that the extracellular matrix protein secreted protein acidic and rich in cysteine (SPARC) is up-regulated and expressed intracellularly in developing muscle, during regeneration and in myopathies, which together suggests that SPARC might serve a specific role within muscle cells. Using co-immunoprecipitation combined with mass spectrometry and verified by staining for direct protein-protein interaction, we find that SPARC binds to actin...
November 28, 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/27906113/dystrophin-restoration-therapy-improves-both-the-reduced-excitability-and-the-force-drop-induced-by-lengthening-contractions-in-dystrophic-mdx-skeletal-muscle
#5
Pauline Roy, Fredérique Rau, Julien Ochala, Julien Messéant, Bodvael Fraysse, Jeanne Lainé, Onnik Agbulut, Gillian Butler-Browne, Denis Furling, Arnaud Ferry
BACKGROUND: The greater susceptibility to contraction-induced skeletal muscle injury (fragility) is an important dystrophic feature and tool for testing preclinic dystrophin-based therapies for Duchenne muscular dystrophy. However, how these therapies reduce the muscle fragility is not clear. METHODS: To address this question, we first determined the event(s) of the excitation-contraction cycle which is/are altered following lengthening (eccentric) contractions in the mdx muscle...
July 20, 2016: Skeletal Muscle
https://www.readbyqxmd.com/read/27904795/the-nine-test-screening-battery-normative-values-on-a-group-of-recreational-athletes
#6
Frida Flodström, Annette Heijne, Mark E Batt, Anna Frohm
BACKGROUND: A variety of risk factors predispose athletes to injury, such as impaired neuromuscular control, insufficient core stability, and muscular imbalances. The goal of assessing functional movement patterns is to detect imbalances and correct them with prevention strategies and thereby decrease injuries, and improve performance and quality of life. PURPOSE: The purpose of this study was to generate normative values for the 'Nine Test Screening Battery' (9TSB) in a group of recreational athletes...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27900711/lacertus-fibrosus-augmentation-for-distal-biceps-brachii-rupture-repair-surgical-technique
#7
M Fontana, A Trimarchi, A Colozza
BACKGROUND: Repair of distal biceps tendon ruptures has become widely accepted. Unfortunately, care of retracted-degenerated injuries remains a challenge for orthopedic surgeons. Complication rates appear to increase when surgery is performed in chronic cases compared to those operated acutely. Multiple techniques for chronic reconstruction with the use of grafts have been described. Recently Morrey, from the Mayo Clinic, proposed a direct anatomic repair of retracted distal biceps tendon ruptures in extreme flexion (60°-90°) to avoid grafting...
December 2016: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/27897416/curcumin-an-effective-adjunct-in-patients-with-statin-associated-muscle-symptoms
#8
REVIEW
Amirhossein Sahebkar, Nikou Saboni, Matteo Pirro, Maciej Banach
In spite of the unequivocal efficacy of statins in reducing primary and secondary cardiovascular events, the use of these drugs in a considerable number of patients is limited because of statin intolerance, mainly statin-associated muscle symptoms (SAMS). SAMS encompass a broad spectrum of clinical presentations, including mild muscular aching and other types of myalgias, myopathy with the significant elevation of creatine kinase, and the rare but life-threatening rhabdomyolysis. Among several pathophysiologic mechanisms of SAMS, mitochondrial dysfunction is thought to be one of the main one...
September 22, 2016: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/27896423/long-term-outcomes-following%C3%A2-h-type-tracheoesophageal-fistula%C3%A2-repair-in-infants
#9
Augusto Zani, Luai Jamal, Giovanni Cobellis, Justyna M Wolinska, Samuel Fung, Evan J Propst, Priscilla P L Chiu, Agostino Pierro
PURPOSE: To evaluate outcomes following repair of H-type tracheoesophageal fistula (TEF). METHODS: Retrospective chart review of infants with H-type TEF treated at our institution between 2000 and 2014. Patient demographics, surgical management, and postoperative function were evaluated. RESULTS: Of the 268 patients with esophageal atresia/TEF treated at our center, 16 (6%) had an H-type TEF (10 males). Thirteen (81%) had associated anomalies...
November 28, 2016: Pediatric Surgery International
https://www.readbyqxmd.com/read/27887661/biochemical-and-proteomic-analyses-of-the-physiological-response-induced-by-individual-housing-in-gilts-provide-new-potential-stress-markers
#10
Anna Marco-Ramell, Laura Arroyo, Raquel Peña, Raquel Pato, Yolanda Saco, Lorenzo Fraile, Emøke Bendixen, Anna Bassols
BACKGROUND: The objective assessment of animal stress and welfare requires proper laboratory biomarkers. In this work, we have analyzed the changes in serum composition in gilts after switching their housing, from pen to individual stalls, which is generally accepted to cause animal discomfort. RESULTS: Blood and saliva samples were collected a day before and up to four days after changing the housing system. Biochemical analyses showed adaptive changes in lipid and protein metabolism after the housing switch, whereas cortisol and muscular markers showed a large variability between animals...
November 25, 2016: BMC Veterinary Research
https://www.readbyqxmd.com/read/27876000/comparison-of-repair-of-peripheral-nerve-transection-in-predegenerated-muscle-with-and-without-a-vein-graft
#11
Jamshid Mohammadi, Hamdollah Delaviz, Bahram Mohammadi, Hamoun Delaviz, Parastou Rad
BACKGROUND: Despite substantial research into the topic and valiant surgical efforts, reconstruction of peripheral nerve injury remains a challenging surgery. This study was conducted to evaluate the effectiveness of axonal regeneration of a transected sciatic nerve through a vein conduit containing degenerated skeletal muscle compared with axonal regeneration in a transected sciatic nerve through degenerated skeletal muscle alone. METHODS: In two of the three experimental rat groups, 10 mm of the left sciatic nerve was transected and removed...
November 22, 2016: BMC Neurology
https://www.readbyqxmd.com/read/27863188/the-use-of-2-conditioning-programs-and-the-fitness-characteristics-of-police-academy-cadets
#12
Charles Cocke, Jay Dawes, Robin Marc Orr
CONTEXT:  Police academy training must physically prepare cadets for the rigors of their occupational tasks to prevent injury and allow them to adequately perform their duties. OBJECTIVE:  To compare the effects of 2 physical training programs on multiple fitness measures in police cadets. DESIGN:  Cohort study. SETTING:  Police training academy. PATIENTS OR OTHER PARTICIPANTS:  We collected data from 70 male (age = 27...
November 18, 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27859236/postnatal-hyperplasic-effects-of-actriib-blockade-in-a-severely-dystrophic-muscle
#13
C Nielsen, R M Potter, C Borowy, K Jacinto, R Kumar, C G Carlson
The efficacy of two ActRIIB ligand trapping agents (RAP-031, RAP-435) in treating muscular dystrophy was examined by determining their morphological effects on the severely dystrophic triangularis sterni (TS) muscle of the mdx mouse, a model for Duchenne muscular dystrophy. These agents trap all endogenous ligands to the ActRIIB receptor and thereby block myostatin signaling in a highly selective manner. Short (1 month) and long term (3 months) in vivo treatment of 1 month old mdx mice increased myonuclei and fiber cross section (FCS) density but did not alter individual fiber size...
November 18, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27854207/long-term-oral-dantrolene-improved-muscular-symptoms-in-a-malignant-hyperthermia-susceptible-individual
#14
Brian N Butala, Audry Kang, Jasmeen Guron, Barbara W Brandom
This case report describes a female with p.Lys4876Arg amino acid change in the ryanodine receptor type 1 (RYR1) and a sibling who died of malignant hyperthermia (MH) during anesthesia. After her diagnosis as MH susceptible, this patient was administered low-dose dantrolene daily for greater than 25 years for treatment of chronic muscle spasm and pain in her lower extremities and back limiting sleep. Her creatine phosphokinase (CPK) was as high as 2390 IU/L during labor and 900 IU at rest. With 25 mg dantrolene daily, muscle cramps were eliminated, and sleep was improved...
March 3, 2016: Journal of Neuromuscular Diseases
https://www.readbyqxmd.com/read/27849484/the-benefits-of-high-intensity-functional-training-fitness-programs-for-military-personnel
#15
Christopher K Haddock, Walker S C Poston, Katie M Heinrich, Sara A Jahnke, Nattinee Jitnarin
INTRODUCTION: High intensity functional training (HIFT) programs are designed to address multiple fitness domains, potentially providing improved physical and mental readiness in a changing operational environment. Programs consistent with HIFT principals such as CrossFit, SEALFIT and the US Marine Corps' High Intensity Tactical Training (HITT) are increasingly popular among military personnel. The goal of HIFT programs is to produce high levels of cardiorespiratory fitness, endurance and strength that exceed those achieved by following current physical activity recommendations...
November 2016: Military Medicine
https://www.readbyqxmd.com/read/27845667/walking-with-a-backpack-using-load-distribution-and-dynamic-load-compensation-reduces-metabolic-cost-and-adaptations-to-loads
#16
Joon-Hyuk Park, Paul Stegall, Haohan Zhang, Sunil Agrawal
In this study, we showed a way of reducing the metabolic cost of walking with a backpack using load distribution and dynamic load compensation, provided by a wearable upper body device. This device distributes the backpack load between the shoulders and the pelvis, senses the vertical motion of the pelvis, and provides gait synchronized compensatory forces to reduce the dynamic loads from a backpack. It was hypothesized that by reducing dynamic loads from a backpack during load carriage, the users gait and postural adaptation, muscular effort and metabolic cost would be reduced...
November 9, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27836677/the-effect-of-instruction-in-analgesic-use-compared-with-neuromuscular-exercise-on-knee-joint-load-in-patients-with-knee-osteoarthritis-a-randomized-single-blind-controlled-trial
#17
A Holsgaard-Larsen, B Clausen, J Søndergaard, R Christensen, T P Andriacchi, E M Roos
OBJECTIVE: To investigate the effect of a neuro-muscular exercise (NEMEX) therapy program compared with instructions in optimized analgesics and anti-inflammatory drug use (PHARMA), on measures of knee-joint load in people with mild to moderate knee osteoarthritis (OA). We hypothesized that knee joint loading during walking would be reduced by NEMEX and potentially increased by PHARMA. DESIGN: Single-blind, RCT comparing NEMEX therapy twice a week with PHARMA. Participants with mild-to-moderate medial tibiofemoral knee OA were randomly allocated (1:1) to one of two 8-week treatments...
November 9, 2016: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/27834955/mitochondria-mediate-cell-membrane-repair-and-contribute-to-duchenne-muscular-dystrophy
#18
Maria C Vila, Sree Rayavarapu, Marshall W Hogarth, Jack H Van der Meulen, Adam Horn, Aurelia Defour, Shin'ichi Takeda, Kristy J Brown, Yetrib Hathout, Kanneboyina Nagaraju, Jyoti K Jaiswal
Dystrophin deficiency is the genetic basis for Duchenne muscular dystrophy (DMD), but the cellular basis of progressive myofiber death in DMD is not fully understood. Using two dystrophin-deficient mdx mouse models, we find that the mitochondrial dysfunction is among the earliest cellular deficits of mdx muscles. Mitochondria in dystrophic myofibers also respond poorly to sarcolemmal injury. These mitochondrial deficits reduce the ability of dystrophic muscle cell membranes to repair and are associated with a compensatory increase in dysferlin-mediated membrane repair proteins...
November 11, 2016: Cell Death and Differentiation
https://www.readbyqxmd.com/read/27834589/the-acute-effect-of-cryotherapy-on-muscle-strength-and-shoulder-proprioception
#19
Rui Torres, Filipa Silva, Vera Pedrosa, João Ferreira, Alexandre Lopes
CONTEXT: A common intervention used by clinicians, cryotherapy poses several benefits in managing acute injuries. However, cooling muscle tissue can interfere with muscular properties and the sensory-motor system. OBJECTIVE: The aim of this study was analyse the influence of cryotherapy with a crushed-ice pack on shoulder proprioception concerning joint position sense, force sense, the threshold for detecting passive movement, and maximal force production. DESIGN: A randomised, double-blind controlled trial...
November 11, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27830921/post-operative-physical-therapy-program-for-latissimus-dorsi-and-teres-major-tendons-transfer-to-rotator-cuff-in-children-with-obstetrical-brachial-plexus-injury
#20
Yasser A Safoury, Mohamed Eldesoky, Enas E Abutaleb, Mohamed Raafat, Ahmed M Gaber
BACKGROUND: The transfer latissimus dorsi and teres major tendons to rotator cuff have been developed to rebalance the muscular dysfunction and improve shoulder range of motion in children with obstetrical brachial plexus palsy (OBPP). No previous study reported the ideal postoperative physical therapy program for these cases. AIM: The aim of the present study was to design appropriate postoperative physical therapy (PT) program after latissimus dorsi and teres major tendons transfer to rotator cuff in OBPP to improve upper limb function...
November 10, 2016: European Journal of Physical and Rehabilitation Medicine
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