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https://www.readbyqxmd.com/read/28633885/characteristics-of-paraspinal-muscle-spindle-response-to-mechanically-assisted-spinal-manipulation-a-preliminary-report
#1
William R Reed, Joel G Pickar, Randall S Sozio, Michael A K Liebschner, Joshua W Little, Maruti R Gudavalli
OBJECTIVES: The purpose of this preliminary study is to determine muscle spindle response characteristics related to the use of 2 solenoid powered clinical mechanically assisted manipulation (MAM) devices. METHODS: L6 muscle spindle afferents with receptive fields in paraspinal muscles were isolated in 6 cats. Neural recordings were made during L7 MAM thrusts using the Activator V (Activator Methods Int. Ltd., Phoenix, AZ) and/or Pulstar (Sense Technology Inc., Pittsburgh, PA) devices at their 3 lowest force settings...
June 17, 2017: Journal of Manipulative and Physiological Therapeutics
https://www.readbyqxmd.com/read/28633832/effects-of-ultrasound-on-the-beef-structure-and-water-distribution-during-curing-through-protein-degradation-and-modification
#2
Da-Cheng Kang, Xue-Qin Gao, Qing-Feng Ge, Guang-Hong Zhou, Wan-Gang Zhang
The objective of this study was to explore the mechanisms of power ultrasound (PUS, 150 and 300W) and treatment time (30 and 120min) on the water-holding capacity (WHC) and tenderness of beef during curing. Beef muscle at 48h post mortem was subjected to PUS treatment at a frequency of 20kHz. Analysis of compression loss and shear force showed that PUS-assisted curing significantly increased the WHC and the tenderness of beef compared to static brining (p<0.05). According to the analysis of LF-NMR, PUS treatment could increase the P21 values which indicated an improvement in water-binding ability of beef muscle...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28630575/acute-and-post-exercise-physiological-responses-to-high-intensity-interval-training-in-endurance-and-sprint-athletes
#3
Lukas Cipryan, Gerhard Tschakert, Peter Hofmann
The purpose of the presented study was to compare acute and post-exercise differences in cardiorespiratory, metabolic, cardiac autonomic, inflammatory and muscle damage responses to high-intensity interval exercise (HIIT) between endurance and sprint athletes. The study group consisted of sixteen highly-trained males (age 22.1 ± 2.5 years) participating in endurance (n = 8) or sprint (n = 8) sporting events. All the participants underwent three exercise sessions: short HIIT (work interval duration 30s), long HIIT (3min) and constant load exercise (CE)...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28630413/bayesian-inference-of-physiologically-meaningful-parameters-from-body-sway-measurements
#4
A Tietäväinen, M U Gutmann, E Keski-Vakkuri, J Corander, E Hæggström
The control of the human body sway by the central nervous system, muscles, and conscious brain is of interest since body sway carries information about the physiological status of a person. Several models have been proposed to describe body sway in an upright standing position, however, due to the statistical intractability of the more realistic models, no formal parameter inference has previously been conducted and the expressive power of such models for real human subjects remains unknown. Using the latest advances in Bayesian statistical inference for intractable models, we fitted a nonlinear control model to posturographic measurements, and we showed that it can accurately predict the sway characteristics of both simulated and real subjects...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28630410/investigating-the-life-expectancy-and-proteolytic-degradation-of-engineered-skeletal-muscle-biological-machines
#5
Caroline Cvetkovic, Meghan C Ferrall-Fairbanks, Eunkyung Ko, Lauren Grant, Hyunjoon Kong, Manu O Platt, Rashid Bashir
A combination of techniques from 3D printing, tissue engineering and biomaterials has yielded a new class of engineered biological robots that could be reliably controlled via applied signals. These machines are powered by a muscle strip composed of differentiated skeletal myofibers in a matrix of natural proteins, including fibrin, that provide physical support and cues to the cells as an engineered basement membrane. However, maintaining consistent results becomes challenging when sustaining a living system in vitro...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28627770/electrochemically-powered-energy-conserving-carbon-nanotube-artificial-muscles
#6
Jae Ah Lee, Na Li, Carter S Haines, Keon Jung Kim, Xavier Lepró, Raquel Ovalle-Robles, Seon Jeong Kim, Ray H Baughman
While artificial muscle yarns and fibers are potentially important for many applications, the combination of large strokes, high gravimetric work capacities, short cycle times, and high efficiencies are not realized for these fibers. This paper demonstrates here electrochemically powered carbon nanotube yarn muscles that provide tensile contraction as high as 16.5%, which is 12.7 times higher than previously obtained. These electrochemical muscles can deliver a contractile energy conversion efficiency of 5...
June 19, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28627041/prior-exercise-speeds-pulmonary-oxygen-uptake-kinetics-and-increases-critical-power-during-supine-but-not-upright-cycling
#7
Richie P Goulding, Denise M Roche, Simon Marwood
Critical power (CP) is a fundamental parameter defining high-intensity exercise tolerance and is related to the time constant of phase II pulmonary oxygen uptake kinetics (τV̇O2 ). To test the hypothesis that this relationship is causal we determined the impact of prior exercise ("priming") on CP and τV̇O2 in the upright and supine positions. 17 healthy men were assigned to either upright or supine exercise groups, whereby CP, τV̇O2 and muscle deoxyhaemoglobin kinetics (τ[HHb] ) were determined via constant-power tests to exhaustion at four work-rates with (primed) and without (control) priming exercise at ∼31%Δ...
June 19, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28626624/biocompatibility-and-in-vivo-operation-of-implantable-mesoporous-pvdf-based-nanogenerators
#8
Yanhao Yu, Haiyan Sun, Hakan Orbay, Feng Chen, Christopher G England, Weibo Cai, Xudong Wang
The rapid developments of implantable biomedical electronics give rise to the motivation of exploring efficient and durable self-powered charging system. In this paper, we report a mesoporous polyvinylidene fluoride (PVDF)-based implantable piezoelectric nanogenerator (NG) for in vivo biomechanical energy harvesting. The NG was built with a sponge-like mesoporous PVDF film and encapsulated by polydimethylsiloxane (PDMS). After embedding this NG into rodents, a Voc of ~200 mV was produced from the gentle movement of rodent muscle...
September 2016: Nano Energy
https://www.readbyqxmd.com/read/28625674/regional-cerebral-cortical-thickness-correlates-with-autonomic-outflow
#9
REVIEW
Katelyn N Wood, Mark B Badrov, Mark R Speechley, J Kevin Shoemaker
Dysregulation of autonomic control often develops with advancing age, favoring a chronic state of heightened sympathetic outflow with parasympathetic withdrawal. However, the mechanisms of this age-related autonomic impairment are not known. This study tested the hypothesis that inter-individual differences in autonomic outflow across the adult age-span are related to cerebral cortex thickness. A total of 55 healthy, active individuals participated in this study (21-73years; 18 female). Physical fitness was treated as a possible covariate (VO2peak: 26-81mL/kg/min)...
June 7, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28625213/effect-of-residence-in-temporary-housing-after-the-great-east-japan-earthquake-on-the-physical-activity-and-quality-of-life-of-older-survivors
#10
Nobuaki Moriyama, Yukio Urabe, Shuichi Onoda, Noriaki Maeda, Tomoyoshi Oikawa
OBJECTIVE: This study aimed to compare the physical activity level and health-related quality of life (HRQOL) between older survivors residing in temporary housing after the Great East Japan Earthquake (GEJE; temporary housing group) and older individuals residing in their own homes (control group) and to clarify whether mobility function and muscle strength were correlated with physical activity among older temporary housing residents. METHODS: Subjects were recruited to the temporary housing group (n=64, 19 men and 45 women) or control group (n=64, 33 men and 31 women) according to their residence...
June 19, 2017: Disaster Medicine and Public Health Preparedness
https://www.readbyqxmd.com/read/28624688/relation-between-peak-power-output-in-sprint-cycling-and-maximum-voluntary-isometric-torque-production
#11
Mehdi Kordi, Stuart Goodall, Paul Barratt, Nicola Rowley, Jonathan Leeder, Glyn Howatson
From a cycling paradigm, little has been done to understand the relationships between maximal isometric strength of different single joint lower body muscle groups and their relation with, and ability to predict PPO and how they compare to an isometric cycling specific task. The aim of this study was to establish relationships between maximal voluntary torque production from isometric single-joint and cycling specific tasks and assess their ability to predict PPO. Twenty male trained cyclists participated in this study...
June 10, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28624380/plasma-phospholipids-and-sphingolipids-identify-stent-restenosis-after-percutaneous-coronary-intervention
#12
Song Cui, Kefeng Li, Lawrence Ang, Jinghua Liu, Liqian Cui, Xiantao Song, Shuzheng Lv, Ehtisham Mahmud
OBJECTIVES: The aim of this study was to evaluate the diagnostic utility of plasma metabolomic biomarkers for in-stent restenosis (ISR). BACKGROUND: ISR remains an issue for patients after percutaneous coronary intervention. Identification of biomarkers to predict ISR could be invaluable for patient care. METHODS: Next-generation metabolomic profiling was performed in the discovery phase from the plasma of 400 patients undergoing percutaneous coronary intervention...
June 7, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28623706/primary-inferior-vena-cava-smooth-muscle-tumor-with-diffuse-bizarre-giant-nuclei-and-low-mitotic-rate-a-nomenclatural-conundrum
#13
Runjan Chetty, Sangeetha N Kalimuthu, Hanna-Riikka Heinonen
A male patient with obstructive jaundice was found to have an incidental nodule within the inferior vena cava (IVC), below the level of the renal vein, on abdominal imaging. At the time of the Whipple's procedure for pancreatic adenocarcinoma, the IVC mass measuring 3.4×2.7×2.2 cm was also removed. Histologically, the lesion was well circumscribed, composed focally of spindle-shaped cells with cigar-shaped nuclei reminiscent of smooth muscle and a dominant pervasive, pleomorphic, bizarre giant cell component...
June 4, 2017: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28623613/assessment-of-metabolic-flexibility-by-means-of-measuring-blood-lactate-fat-and-carbohydrate-oxidation-responses-to-exercise-in-professional-endurance-athletes-and-less-fit-individuals
#14
Iñigo San-Millán, George A Brooks
BACKGROUND: Increased muscle mitochondrial mass is characteristic of elite professional endurance athletes (PAs), whereas increased blood lactate levels (lactatemia) at the same absolute submaximal exercise intensities and decreased mitochondrial oxidative capacity are characteristics of individuals with low aerobic power. In contrast to PAs, patients with metabolic syndrome (MtS) are characterized by a decreased capacity to oxidize lipids and by early transition from fat to carbohydrate oxidation (FATox/CHOox), as well as elevated blood lactate concentration [La(-)] as exercise power output (PO) increases, a condition termed 'metabolic inflexibility'...
June 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28622670/adaptive-clutter-demodulation-for-non-contrast-ultrasound-perfusion-imaging
#15
Jaime Tierney, Crystal Coolbaugh, Theodore Towse, Brett Byram
Conventional Doppler ultrasound is useful for visualizing fast blood flow in large resolvable vessels. However, frame rate and tissue clutter caused by movement of the patient or sonographer make visualizing slow flow with ultrasound difficult. Patient and sonographer motion causes spectral broadening of the clutter signal, which limits ultrasound's sensitivity to velocities greater than 5-10mm/s for typical clinical imaging frequencies. To address this, we propose a clutter filtering technique that may increase the sensitivity of Doppler measurements to at least as low as 0...
June 13, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28621938/inhibition-of-proliferation-of-vascular-smooth-muscle-cells-by-cucurbitanes-from-momordica-charantia
#16
Nguyen Quoc Tuan, Do-Hyung Lee, Joonseok Oh, Chung Sub Kim, Kyung-Sun Heo, Chang-Seon Myung, MinKyun Na
The cucurbitaceous plant Momordica charantia L., named "bitter melon", inhabits Asia, Africa, and South America and has been used as a traditional medicine. The atypical proliferation of vascular smooth muscle cells (VSMCs) plays an important role in triggering the pathogenesis of cardiovascular diseases. Platelet-derived growth factor (PDGF) is regarded as the most powerful growth factor in promoting the intimal accumulation of VSMCs. The current study features the identification of six new cucurbitane-type triterpenoids (1-6) from the fruits of M...
June 16, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/28612666/igg4-related-sclerosing-disease-of-the-breast-in-a-male-patient
#17
Taisia Vitkovski, Galina S Marder, Dominic A Filardi, Ekta Gupta, Frank Breuer
IgG4-related sclerosing disease of the breast is a rare entity with 10 reports in the literature. We report the first case in a male patient. A 48-year-old male presented with 4-week history of palpable right upper outer quadrant breast mass associated with skin puckering. He reported a family history of breast cancer in his aunt. Ultrasound and mammography showed a spiculated 2.5-cm mass associated with skin retraction with extension to the pectoralis muscle. Ultrasound-guided core biopsy was performed. The findings were interpreted as acute and chronic inflammatory process...
June 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28612300/effects-of-photobiomodulation-therapy-on-bothrops-moojeni-snake-envenomed-gastrocnemius-of-mice-using-enzymatic-biomarkers
#18
Doroty Mesquita Dourado, Rosemary Matias, Marcos Barbosa-Ferreira, Baldomero Antonio Kato da Silva, Jéssica de Araujo Isaias Muller, Willians Fernando Vieira, Maria Alice da Cruz-Höfling
Bothropic venom contains a range of biologically active substances capable of causing severe local and systemic envenoming symptomatology within its victims. The snake anti-venom is effective against systemic effects but has no neutralizing effect against the fast developing local effects. Herein, mice gastrocnemius injected with Bothrops moojeni venom (40 μg/kg) or saline solution were irradiated with HeNe (632.8 nm) and GaAs (904 nm) lasers (daily energy density of 4 J/cm(2); 0.03/0.21 power density; 0...
June 13, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28609641/flexibility-training-and-the-repeated-bout-effect-priming-interventions-prior-to-eccentric-training-of-the-knee-flexors
#19
Andrew W Leslie, Joel L Lanovaz, Justin W Andrushko, Jonathan P Farthing
Both the repeated bout effect and increased flexibility have been linked to reduced muscle damage, fatigue and strength loss after intense eccentric exercise. Our purpose was to compare the eccentric training (ECC) response after first priming the muscles with either static flexibility training or a single intense bout of eccentric exercise. Twenty-five participants were randomly assigned to flexibility training (F;n=8; 3x/week; 30 min/day), a single-bout of intense eccentric exercise (SB;n=9), or no intervention (control [C];n=8) during a 4-week priming phase, prior to completing a subsequent 4-week period of eccentric training of the knee flexors...
June 13, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28609585/immunoexpression-of-p16-in-uterine-leiomyomas-with-infarct-type-necrosis-an-analysis-of-35-cases
#20
Philip P C Ip, Diana Lim, Annie N Y Cheung, Esther Oliva
AIMS: Uterine leiomyosarcomas frequently show p16 immunoexpression. However, p16 may also be expressed in some benign leiomyoma variants such as leiomyomas with bizarre nuclei and cellular leiomyomas, limiting its utility as a biomarker to distinguish between benign and malignant neoplasms. We investigated p16 expression in leiomyomas with infarct-type necrosis, tumours which may sometimes be misinterpreted as smooth muscle tumors of uncertain malignant potential or even leiomyosarcoma on conventional light microscopy...
June 13, 2017: Histopathology
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