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Muscle recovery

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https://www.readbyqxmd.com/read/28229237/different-recoveries-of-the-first-and-second-phases-of-the-m-wave-after-intermittent-maximal-voluntary-contractions
#1
Javier Rodriguez-Falces, Nicolas Place
PURPOSE: We investigated the recovery of muscle electrical properties after intermittent intense exercise by examining separately the first and second phases of the muscle compound action potential (M-wave). METHODS: M-waves and mechanical twitches were obtained using femoral nerve stimulation throughout the 30-min recovery period following 48 successive intermittent 3-s MVCs. The amplitude, duration, and area of the M-wave first and second phases, and the peak twitch force were measured from the knee extensors...
February 22, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28228932/a-clinically-relevant-in-vivo-model-for-the-assessment-of-scaffold-efficacy-in-abdominal-wall-reconstruction
#2
Jeffrey Cy Chan, Krishna Burugapalli, Yi-Shiang Huang, John L Kelly, Abhay Pandit
An animal model that allows for assessment of the degree of stretching or contraction of the implant area and the in vivo degradation properties of biological meshes is required to evaluate their performance in vivo. Adult New Zealand rabbits underwent full thickness subtotal unilateral rectus abdominis muscle excision and were reconstructed with the non-biodegradable Peri-Guard(®), Prolene(®) or biodegradable Surgisis(®) meshes. Following 8 weeks of recovery, the anterior abdominal wall tissue samples were collected for measurement of the implant dimensions...
January 2017: Journal of Tissue Engineering
https://www.readbyqxmd.com/read/28228795/bone-scintigraphy-of-severe-hypercalcemia-following-simvastatin-induced-rhabdomyolysis
#3
Zubair B Mirza, Sophia Hu, Louis F Amorosa
Simvastatin induced rhabdomyolysis with renal failure is a well reported clinical entity with hyperkalemia recognized as a life threatening risk. The risk of delayed hypercalcemia during the recovery of renal function is not well appreciated as this varies in severity and can be caused by multiple mechanisms. We present a patient with high dose simvastatin induced rhabdomyolysis leading to late onset of severe hypercalcemia due to calcium phosphate deposition in muscles diagnosed by distinctive bone scintigraphy...
September 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/28227743/mri-measures-of-fat-infiltration-in-the-lower-extremities-following-motor-incomplete-spinal-cord-injury-reliability-and-potential-implications-for-muscle-activation
#4
Andrew C Smith, Maria Knikou, Katrina L Yelick, Abigail R Alexander, Margaret M Murnane, Andrew A Kritselis, Paul J Houmpavlis, Jacob G McPherson, Marie Wasielewski, Mark A Hoggarth, James M Elliott, Andrew C Smith, Maria Knikou, Katrina L Yelick, Abigail R Alexander, Margaret M Murnane, Andrew A Kritselis, Paul J Houmpavlis, Jacob G McPherson, Marie Wasielewski, Mark A Hoggarth, James M Elliott, Margaret M Murnane, Paul J Houmpavlis, Katrina L Yelick, Mark A Hoggarth, Marie Wasielewski, James M Elliott, Maria Knikou, Jacob G McPherson, Abigail R Alexander, Andrew A Kritselis, Andrew C Smith
Muscle fat infiltration (MFI) is an expected consequence of incomplete spinal cord injury (iSCI). The MFI magnitude may have clinical value in determining functional recovery. However, there is a lack of understanding of how MFI relates to the volitional muscle activity in people with motor incomplete spinal cord injury (iSCI). Five iSCI and 5 uninjured age-matched control subjects participated in the study. In this preliminary study, we established the reliability of MFI quantification of select lower extremity muscles across different raters...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227338/surface-electromyography-based-muscle-fatigue-analysis-for-stroke-patients-at-different-brunnstrom-stages
#5
Yinjun Tu, Zhe Zhang, Xudong Gu, Qiang Fang, Yinjun Tu, Zhe Zhang, Xudong Gu, Qiang Fang, Qiang Fang, Zhe Zhang, Yinjun Tu, Xudong Gu
Muscle fatigue analysis has been an important topic in sport and rehabilitation medicine due to its role in muscle performance evaluation and pathology investigation. This paper proposes a surface electromyography (sEMG) based muscle fatigue analysis approach which was specifically designed for stroke rehabilitation applications. 14 stroke patients from 5 different Brunnstrom recovery stage groups were involved in the experiment and features including median frequency and mean power frequency were extracted from the collected sEMG samples for investigation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227235/split-belt-controllable-treadmill-with-differential-velocity-based-fall-stimulation-and-motion-analysis
#6
Yasutaka Nakashima, Hiroki Noutsuka, Takanori Fukui, Motoji Yamamoto, Yasutaka Nakashima, Hiroki Noutsuka, Takanori Fukui, Motoji Yamamoto, Takanori Fukui, Hiroki Noutsuka, Yasutaka Nakashima, Motoji Yamamoto
Amid trends toward aging populations in developed nations, the number of people requiring nursing care has increased markedly. Slips and falls during ordinary daily activities are a common cause of fractured bones and muscle injury. Several studies have analyzed the movements produced by artificially generated slip and fall stimuli, but few have investigated these stimuli. We analyzed lower-limb motion following a slip and fall stimulus produced using a pulled free-walking system consisting of a controllable split-belt treadmill, where a speed difference between the belts could be applied to produce a slipping motion...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226330/nutritional-recovery-after-open-and-laparoscopic-distal-gastrectomy-for-early-gastric-cancer-a-prospective-multicenter-comparative-trial-ccog1204
#7
Hidenobu Matsushita, Chie Tanaka, Kenta Murotani, Kazunari Misawa, Seiji Ito, Yuichi Ito, Mitsuro Kanda, Yoshinari Mochizuki, Kiyoshi Ishigure, Toyohisa Yaguchi, Jin Teramoto, Hiroshi Nakayama, Yoshihisa Kawase, Michitaka Fujiwara, Yasuhiro Kodera
BACKGROUND: Little information from prospective clinical trials is available on the influences of surgical approaches on postoperative body compositions and nutritional status. We designed a prospective non-randomized trial to compare postoperative chronological changes in body composition and nutritional status between laparoscopic and open distal gastrectomy for stage I gastric cancer (GC). METHODS: Body compositions and nutritional indicators in blood tests were measured at the baseline and at the 1st, 3rd, 6th, and 12th postoperative months (POM)...
February 23, 2017: Digestive Surgery
https://www.readbyqxmd.com/read/28226224/different-electrophysiological-effects-of-the-levo-and-dextrorotatory-isomers-of-mexiletine-in-isolated-rabbit-cardiac-muscle
#8
Zsolt Gurabi, Bence Patocskai, Balázs Györe, László Virág, Péter Mátyus, Julius Gy Papp, András Varró, Istvan Koncz
Racemic mexiletine is a widely used antiarrhythmic agent which blocks sodium channels. The effects of R-(-) and S-(+) mexiletine stereoisomers on maximum rate of depolarization (Vmax), conduction time and repolarization have not yet been investigated in isolated cardiac preparations. We studied the effect of the R-(-) and S-(+) mexiletine on rabbit cardiac action potential parameters by using the conventional microelectrode technique. Both enantiomers at 20 µM of therapeutically and experimentally relevant concentration, significantly depressed the Vmax at fast heart rates (BCLs 300 - 700 ms)...
February 22, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28225888/local-inhibition-of-nitrergic-activity-in-tenotomized-rats-accelerates-muscle-regeneration-by-increasing-fiber-area-and-decreasing-central-core-lesions
#9
A D Seabra, S A S Moraes, E J O Batista, T B Garcia, M C Souza, K R M Oliveira, A M Herculano
Muscular atrophy is a progressive degeneration characterized by muscular proteolysis, loss of mass and decrease in fiber area. Tendon rupture induces muscular atrophy due to an intrinsic functional connection. Local inhibition of nitric oxide synthase (NOS) by Nω-nitro-L-arginine methyl ester (L-NAME) accelerates tendon histological recovery and induces functional improvement. Here we evaluate the effects of such local nitrergic inhibition on the pattern of soleus muscle regeneration after tenotomy. Adult male Wistar rats (240 to 280 g) were divided into four experimental groups: control (n=4), tenotomized (n=6), vehicle (n=6), and L-NAME (n=6)...
February 20, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28225783/heart-and-skeletal-muscle-inflammation-hsmi-disease-diagnosed-on-a-british-columbia-salmon-farm-through-a-longitudinal-farm-study
#10
Emiliano Di Cicco, Hugh W Ferguson, Angela D Schulze, Karia H Kaukinen, Shaorong Li, Raphaël Vanderstichel, Øystein Wessel, Espen Rimstad, Ian A Gardner, K Larry Hammell, Kristina M Miller
Heart and skeletal muscle inflammation (HSMI) is an emerging disease of marine-farmed Atlantic Salmon (Salmo salar), first recognized in 1999 in Norway, and later also reported in Scotland and Chile. We undertook a longitudinal study involving health evaluation over an entire marine production cycle on one salmon farm in British Columbia (Canada). In previous production cycles at this farm site and others in the vicinity, cardiac lesions not linked to a specific infectious agent or disease were identified. Histologic assessments of both live and moribund fish samples collected at the farm during the longitudinal study documented at the population level the development, peak, and recovery phases of HSMI...
2017: PloS One
https://www.readbyqxmd.com/read/28224277/energy-metabolism-during-endurance-flight-and-the-post-flight-recovery-phase
#11
REVIEW
Susanne Jenni-Eiermann
Migrating birds are known to fly non-stop for thousands of kilometres without food or water intake and at a high metabolic rate thereby relying on energy stores which were built up preceding a flight bout. Hence, from a physiological point of view the metabolism of a migrant has to switch between an active fasting phase during flight and a fuelling phase during stopover. To meet the energetic and water requirements of endurance flight, migratory birds have to store an optimal fuel composition and they have to be able to quickly mobilize and deliver sufficient energy to the working flight muscles...
February 21, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28224246/comparison-of-veterinary-drug-residue-results-in-animal-tissues-by-ultrahigh-performance-liquid-chromatography-coupled-to-triple-quadrupole-or-quadrupole-time-of-flight-tandem-mass-spectrometry-after-different-sample-preparation-methods-including-use-of-a-commercial
#12
Tarun Anumol, Steven J Lehotay, Joan Stevens, Jerry Zweigenbaum
Veterinary drug residues in animal-derived foods must be monitored to ensure food safety, verify proper veterinary practices, enforce legal limits in domestic and imported foods, and for other purposes. A common goal in drug residue analysis in foods is to achieve acceptable monitoring results for as many analytes as possible, with higher priority given to the drugs of most concern, in an efficient and robust manner. The U.S. Department of Agriculture has implemented a multiclass, multi-residue method based on sample preparation using dispersive solid phase extraction (d-SPE) for cleanup and ultrahigh-performance liquid chromatography-tandem quadrupole mass spectrometry (UHPLC-QQQ) for analysis of >120 drugs at regulatory levels of concern in animal tissues...
February 21, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28224232/effects-of-traumeel-tr14-on-recovery-and-inflammatory-immune-response-after-repeated-bouts-of-exercise-a-double-blind-rct
#13
Kerstin Muders, Christian Pilat, Vanessa Deuster, Torsten Frech, Karsten Krüger, Jörn Pons-Kühnemann, Frank-Christoph Mooren
PURPOSE: The purpose of this double-blind, randomized, placebo-controlled clinical trial was to investigate the effects of the natural combination medicine Traumeel (Tr14) consisting of 14 diluted biological and mineral components on the inflammatory immune response and recovery up to 72 h after repetitive bouts of bicycle tests. METHODS: Antigen-stimulated IL-1ra and IL-6 were defined as primary outcome measures. Moreover, various immunological and serum muscle damage markers were investigated...
February 21, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28222859/determination-of-benzimidazoles-in-meat-samples-by-capillary-zone-electrophoresis-tandem-mass-spectrometry-following-dispersive-liquid-liquid-microextraction
#14
Carmen Tejada-Casado, David Moreno-González, Francisco J Lara, Ana M García-Campaña, Monsalud Del Olmo-Iruela
A novel method based on capillary zone electrophoresis-tandem mass spectrometry has been proposed and validated for the identification and simultaneous quantification of twelve benzimidazoles in meat samples. Electrophoretic separation was carried out using 500mM formic acid (pH 2.2) as background electrolyte and applying a voltage of 25kV at 25°C. In order to improve the sensitivity, stacking mode injection was applied, using as injection solvent a mixture of 30:70 acetonitrile/water at 50mbar for 75s. Sensitivity enhancement factors from 74 to 317 were obtained under these conditions...
February 14, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28221913/an-immunoassay-for-quantification-of-contamination-by-raw-meat-juice-on-food-contact-surfaces
#15
Fur-Chi Chen, Sandria Godwin, Edgar Chambers
Raw chicken products often are contaminated with Salmonella and Campylobacter , which can be transmitted from packages to contact surfaces. Raw meat juices from these packages also provide potential media for cross-contamination. There are limited quantitative data on the levels of consumer exposure to raw meat juice during shopping for and handling of chicken products. An exposure assessment is needed to quantify the levels of transmission and to assess the risk. An enzyme-linked immunosorbent assay (ELISA) was developed and validated for quantitative detection of raw meat juice on hands and various food contact surfaces...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28220067/shared-and-task-specific-muscle-synergies-during-normal-walking-and-slipping
#16
Mohammad Moein Nazifi, Han Ul Yoon, Kurt Beschorner, Pilwon Hur
Falling accidents are costly due to their prevalence in the workplace. Slipping has been known to be the main cause of falling. Understanding the motor response used to regain balance after slipping is crucial to developing intervention strategies for effective recovery. Interestingly, studies on spinalized animals and studies on animals subjected to electrical microstimulation have provided major evidence that the Central Nervous System (CNS) uses motor primitives, such as muscle synergies, to control motor tasks...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28219129/-effects-of-sevoflurane-and-desflurane-on-pharmacodynamics-of-rocuronium-in-children
#17
D X Kang, Y Q Rao, B Ji, J Li
Objective: To observe the intraoperative influences on pharmacodynamics of rocuronium in children inhaling sevoflurane and desflurane for 40 min balance. Methods: Ninety children (ASAⅠ-Ⅱ) undergoing elective surgery with general anesthesia in Second Affiliated Hospital & Yuying Children's Hospital, Wenzhou Medical University from July 2015 to May 2016 were randomly assigned into six groups (n=15): Sevoflurane group (group S1 and S2), Desflurane group (group D1 and D2) and Propofol group (group P1 and P2)...
February 14, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28218878/imaging-of-muscle-injuries-in-sports-medicine-sports-imaging-series
#18
Ali Guermazi, Frank W Roemer, Philip Robinson, Johannes L Tol, Ravindar R Regatte, Michel D Crema
In sports-related muscle injuries, the main goal of the sports medicine physician is to return the athlete to competition-balanced against the need to prevent the injury from worsening or recurring. Prognosis based on the available clinical and imaging information is crucial. Imaging is crucial to confirm and assess the extent of sports-related muscle injuries and may help to guide management, which directly affects the prognosis. This is especially important when the diagnosis or grade of injury is unclear, when recovery is taking longer than expected, and when interventional or surgical management may be necessary...
March 2017: Radiology
https://www.readbyqxmd.com/read/28218814/mr-elastography-measurement-of-the-effect-of-passive-warmup-prior-to-eccentric-exercise-on-thigh-muscle-mechanical-properties
#19
Paul Kennedy, Lewis J Macgregor, Eric Barnhill, Curtis L Johnson, Michael Perrins, Angus Hunter, Colin Brown, Edwin J R van Beek, Neil Roberts
PURPOSE: To investigate the effect of warmup by application of the thermal agent Deep Heat (DH) on muscle mechanical properties using magnetic resonance elastography (MRE) at 3T before and after exercise-induced muscle damage (EIMD). MATERIALS AND METHODS: Twenty male participants performed an individualized protocol designed to induce EIMD in the quadriceps. DH was applied to the thigh in 50% of the participants before exercise. MRE, T2 -weighted MRI, maximal voluntary contraction (MVC), creatine kinase (CK) concentration, and muscle soreness were measured before and after the protocol to assess EIMD effects...
February 20, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28218021/a-systematic-review-of-mechanisms-of-gait-speed-change-post-stroke-part-2-exercise-capacity-muscle-activation-kinetics-and-kinematics
#20
Elizabeth C Wonsetler, Mark G Bowden
BACKGROUND: Regaining locomotor ability is a primary goal in stroke rehabilitation and is most commonly measured using changes in self-selected walking speed. However, walking speed cannot identify the mechanisms by which an individual recovers. Laboratory-based mechanistic measures such as exercise capacity, muscle activation, force production, and movement analysis variables may better explain neurologic recovery. OBJECTIVES: The objectives of this systematic review are to examine changes in mechanistic gait outcomes and describe motor recovery as quantified by changes in laboratory-based mechanistic variables in rehabilitation trials...
February 20, 2017: Topics in Stroke Rehabilitation
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