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https://www.readbyqxmd.com/read/29775800/insertion-and-presence-of-fine-wire-intramuscular-electrodes-to-the-lumbar-paraspinal-muscles-do-not-affect-muscle-performance-and-activation-during-high-exertion-spinal-extension-activities
#1
Szu-Ping Lee, Jo Armour Smith, Matthew Kimber, Kelsey Houk
BACKGROUND: Low back pain (LBP) is commonly associated with paraspinal muscle dysfunctions. A method to study deep lumbar paraspinal (i.e. multifidus) muscle function and neuromuscular activation pattern is intramuscular electromyography (EMG). Previous studies have shown that the procedure does not significantly impact muscle function during activities involving low-level muscle contractions. However, it is currently unknown how muscular function and activation are affected during high-exertion contractions...
May 15, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29775754/effects-of-micrornas-on-skeletal-muscle-development
#2
REVIEW
J Wang, L Z Yang, J S Zhang, J X Gong, Y H Wang, C L Zhang, H Chen, X T Fang
MicroRNAs (miRNAs) are small (about 22 nucleotides) noncoding RNAs, which were highly conserved among mammals. They have ushered in a new era in molecular biology over twenty years. They can negatively regulate gene expression at the posttranscriptional level through the principle of complementary base pairing with the 3' untranslated region (UTR) of their target mRNAs and induce their degradation. They involve in tissue morphogenesis, cellular processes like apoptosis, and major signaling pathways. Previous studies have promoted our understanding that miRNAs play an important role in myogenesis and have a big impact on muscle mass, muscle fiber type and muscle diseases...
May 15, 2018: Gene
https://www.readbyqxmd.com/read/29775427/determination-of-fipronil-and-its-metabolites-in-chicken-egg-muscle-and-cake-by-a-modified-quechers-method-coupled-with-lc-ms-ms
#3
Qiaozhen Guo, Shan Zhao, Jing Zhang, Kailun Qi, Zhenxia Du, Bing Shao
An easy-to-use method for determining the levels of fipronil and its metabolites (fipronil-desulfinyl, fipronil-sulfone and fipronil-sulfide) in chicken egg, muscle and cake was developed and validated using a modified quick, easy, cheap, effective, rugged, and safe (QuEChERS) approach coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis. The samples were extracted using acetonitrile, salted out with sodium chloride at -20 °C, and then purified by combined PSA and C18 phases and anhydrous magnesium sulfate...
May 18, 2018: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
https://www.readbyqxmd.com/read/29774990/searching-for-a-mitochondrial-root-to-the-decline-in-muscle-function-with-ageing
#4
EDITORIAL
Marta Gonzalez-Freire, Fatemeh Adelnia, Ruin Moaddel, Luigi Ferrucci
Sarcopenia, the age-related loss of muscle mass and strength, is linked to a range of adverse outcomes, such as impaired physical performance, cognitive function, and mortality. Preventing sarcopenia may reduce the burden of functional decline with aging and its impact on physiological and economic well-being in older adults. Mitochondria in muscle cells lose their intrinsic efficiency and capacity to produce energy during aging, and it has been hypothesized that such a decline is the main driver of sarcopenia...
May 18, 2018: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/29773704/effect-of-dietary-omega-3-fatty-acid-supplementation-on-frailty-related-phenotypes-in-older-adults-a-systematic-review-and-meta-analysis-protocol
#5
Joanne Stocks, Ana M Valdes
INTRODUCTION: The beneficial effect of dietary omega-3 supplementation in younger adults or older people with acute or chronic disease is established. Knowledge is now needed about the effect in medically stable older people. The objective of this study is to examine and assess the evidence for a role of dietary omega-3 polyunsaturated fatty acid (PUFA) supplementation in older adults on (1) muscle mass and muscle strength, (2) inflammatory biomarkers and (3) physical activity. METHODS AND ANALYSIS: A systematic review and data synthesis will be conducted of randomised controlled trials in older people not recruited for any given disease diagnosis...
May 17, 2018: BMJ Open
https://www.readbyqxmd.com/read/29773272/juvenile-dermatomyositis-latest-advances
#6
REVIEW
Qiong Wu, Lucy R Wedderburn, Liza J McCann
Registries and biobanks for juvenile dermatomyositis (JDM) have generated statistical power to help understand pathogenesis and determine treatment and long-term outcomes in this rare and heterogeneous disease. Genotype, autoantibodies, muscle histology and early clinical features may predict prognosis and guide personalised treatment. While corticosteroids and disease-modifying anti-rheumatic drugs improve outcomes, there remain children who experience refractory disease. Ongoing research into the aberrant immune response and novel biological targets is necessary...
August 2017: Best Practice & Research. Clinical Rheumatology
https://www.readbyqxmd.com/read/29772819/do-young-people-ever-sit-still-variations-in-accelerometer-counts-muscle-activity-and-heart-rate-across-various-sedentary-activities-in-youth
#7
Evi van Ekris, Mai J M Chinapaw, Joost Rotteveel, Teatske M Altenburg
Evidence of adverse health effects of TV viewing is stronger than for overall sedentary behaviour in youth. One explanation may be that TV viewing involves less body movement than other sedentary activities. Variations in body movement across sedentary activities are currently unknown, as are age differences in such variations. This study examined body movement differences across various sedentary activities in children and adolescents, assessed by hip-, thigh- and wrist-worn accelerometers, muscle activity and heart rate...
May 17, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29772730/at-the-crossroads-of-clinical-and-preclinical-research-for-muscular-dystrophy-are-we-closer-to-effective-treatment-for-patients
#8
REVIEW
Kinga I Gawlik
Among diseases affecting skeletal muscle, muscular dystrophy is one of the most devastating and complex disorders. The term 'muscular dystrophy' refers to a heterogeneous group of genetic diseases associated with a primary muscle defect that leads to progressive muscle wasting and consequent loss of muscle function. Muscular dystrophies are accompanied by numerous clinical complications and abnormalities in other tissues that cause extreme discomfort in everyday life. The fact that muscular dystrophy often takes its toll on babies and small children, and that many patients die at a young age, adds to the cruel character of the disease...
May 16, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29772649/pulmonary-arterial-hypertension-pathophysiology-and-treatment
#9
REVIEW
Norris S H Lan, Benjamin D Massam, Sandeep S Kulkarni, Chim C Lang
Pulmonary arterial hypertension (PAH), the first category of pulmonary hypertension, is a chronic and progressive disorder characterised by angioproliferative vasculopathy in the pulmonary arterioles, leading to endothelial and smooth muscle proliferation and dysfunction, inflammation and thrombosis. These changes increase pulmonary vascular resistance and subsequent pulmonary arterial pressure, causing right ventricular failure which leads to eventual death if untreated. The management of PAH has advanced rapidly in recent years due to improved understanding of the condition's pathophysiology, specifically the nitric oxide, prostacyclin-thromboxane and endothelin-1 pathways...
May 16, 2018: Diseases (Basel)
https://www.readbyqxmd.com/read/29772412/tactile-cues-can-change-movement-an-example-using-tape-to-redistribute-flexion-from-the-lumbar-spine-to-the-hips-and-knees-during-lifting
#10
Brendan L Pinto, Shawn M Beaudette, Stephen H M Brown
Given the appropriate cues, kinematic factors associated with low back injury risk and pain, such as spine flexion, can be avoided. Recent research has demonstrated the potential for tactile sensory information to change movement. In this study an athletic strapping tape was applied bilaterally along the lumbar extensor muscles to provide continuous tactile feedback information during a repeated lifting and lowering task. The presence of the tape resulted in a statistically significant reduction in lumbar spine flexion when compared to a baseline condition in which no tape was present...
May 14, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29771953/mitochondrial-disease-patient-motivations-and-barriers-to-participate-in-clinical-trials
#11
Zarazuela Zolkipli-Cunningham, Rui Xiao, Amy Stoddart, Elizabeth M McCormick, Amy Holberts, Natalie Burrill, Shana McCormack, Lauren Williams, Xiaoyan Wang, John L P Thompson, Marni J Falk
BACKGROUND: Clinical treatment trials are increasingly being designed in primary mitochondrial disease (PMD), a phenotypically and genetically heterogeneous collection of inherited multi- system energy deficiency disorders that lack effective therapy. We sought to identify motivating factors and barriers to clinical trial participation in PMD. METHODS: A survey study was conducted in two independent mitochondrial disease subject cohorts. A discovery cohort invited subjects with well-defined biochemical or molecularly- confirmed PMD followed at a single medical center (CHOP, n = 30/67 (45%) respondents)...
2018: PloS One
https://www.readbyqxmd.com/read/29771627/efficiency-and-perceived-exertion-of-novel-wheelchair-wheels-a-comparative-study
#12
Laura Sanches Rocha, Bonita Sawatzky, W Ben Mortenson
New geared wheelchair wheels have been developed allowing the user to pull backwards on the rims to move forward. Theoretically, this utilizes larger muscle groups compared to conventional propulsion preventing repetitive stress injuries. This study compared the gross mechanical efficiency (GME), perceived effort and energy expenditure of propelling the wheelchair using two types of these geared wheels and standard forward propulsion wheels. A within participants repeated measures design was used. Participants' energy expenditure and perceived exertion were measured...
May 17, 2018: Assistive Technology: the Official Journal of RESNA
https://www.readbyqxmd.com/read/29769821/validity-and-reliability-of-surface-electromyography-measurements-from-a-wearable-athlete-performance-system
#13
Scott K Lynn, Casey M Watkins, Megan A Wong, Katherine Balfany, Daniel F Feeney
The Athos ® wearable system integrates surface electromyography (sEMG ) electrodes into the construction of compression athletic apparel. The Athos system reduces the complexity and increases the portability of collecting EMG data and provides processed data to the end user. The objective of the study was to determine the reliability and validity of Athos as compared with a research grade sEMG system. Twelve healthy subjects performed 7 trials on separate days (1 baseline trial and 6 repeated trials). In each trial subjects wore the wearable sEMG system and had a research grade sEMG system's electrodes placed just distal on the same muscle, as close as possible to the wearable system's electrodes...
June 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29766941/idiopathic-inflammatory-myopathies-in-adults-a-comparative-study-of-bohan-and-peter-and-european-neuromuscular-center-2004-criteria
#14
Sundaram Challa, Saumya Jakati, Megha S Uppin, Meena A Kannan, Rajasekhar Liza, M K Murthy Jagarlapudi
Background: Bohan and Peter criteria are widely used for the diagnosis of idiopathic inflammatory myopathies (IIMs). Recently, European Neuromuscular Center (ENMC) formulated criteria to identify subgroups of IIMs. Aim: To compare the two diagnostic criteria in adult IIMs. Materials and Methods: This was a retrospective review of case records of histologically confirmed IIMs in adults between January 2014 and May 2015. Both the Bohan and Peter, and ENMC 2004 criteria were applied in the same group of patients to subgroup the IIMs...
May 2018: Neurology India
https://www.readbyqxmd.com/read/29765878/effects-of-very-high-stimulation-frequency-and-wide-pulse-duration-on-stimulated-force-and-fatigue-of-quadriceps-in-healthy-participants
#15
Kitima Rongsawad, Jonjin Ratanapinunchai
Objective: To determine the effect of very high stimulation frequency (150 and 200 Hz) with wide pulse duration versus 50 Hz with wide pulse duration on stimulated force and fatigue of quadriceps femoris in healthy participants. Methods: Thirty-four healthy participants underwent fatigue test using three stimulation frequency conditions (50, 150, and 200 Hz) with pulse duration of 0.9 ms. Normalized force values at the end of each fatigue protocol and curve fitting patterns were compared among stimulated frequencies...
April 2018: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29765120/oncological-outcome-of-primary-and-secondary-muscle-invasive-bladder-cancer-a-systematic-review-and-meta-analysis
#16
Peng Ge, Li Wang, Meng Lu, Lijun Mao, Wang Li, Rumin Wen, Jian Lin, Junqi Wang, Jiacun Chen
Conflicting results of survival outcomes for primary and secondary muscle-invasive bladder cancer (MIBC) have been reported in previous studies. Primary MIBC is defined as presentation of muscle-invasive disease at initial diagnosis while secondary MIBC presumes that non-muscle invasive disease later progressed to MIBC. Due to the varying reports, we conducted a systematic review and meta-analysis to compare survival outcomes between the two groups. Relevant studies were retrieved from Medline, Embase, the Cochrane Library, and Scopus using a comprehensive search approach...
May 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29762339/the-relationship-between-fear-avoidance-and-neuromuscular-measures-of-function-in-patients-with-adult-degenerative-scoliosis
#17
Ram Haddas, Isador H Lieberman, Andrew Block
STUDY DESIGN: A prospective cohort study. OBJECTIVE: To examine the relationship of fear-avoidance beliefs and neuromuscular activity during gait in adult degenerative scoliosis (ADS) patients. SUMMARY OF BACKGROUND DATA: Among patients with chronic spine pain, fear-avoidance beliefs are predictive of poor surgical outcomes. Fear-avoidance occurs when patients perceive that movement will worsen underlying physical problems. This process leads them to restrict activity, which further heightens emotional distress...
May 14, 2018: Spine
https://www.readbyqxmd.com/read/29762150/physical-activity-and-fitness-for-the-prevention-of-hypertension
#18
Esmée A Bakker, Xuemei Sui, Angelique G Brellenthin, Duck-Chul Lee
PURPOSE OF REVIEW: The aim of this review is to evaluate the most recent literature about the role of physical activity, exercise, and fitness in hypertension prevention. RECENT FINDINGS: Strong evidence indicates that performing moderate-to-vigorous physical activity, particularly aerobic exercise, and improving cardiorespiratory fitness (CRF) reduce blood pressure (BP) levels and lower hypertension incidence. Although evidence is limited, performing resistance exercise or improving muscular strength appears to be associated with a lower incidence of hypertension...
May 11, 2018: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/29761537/scapular-upward-rotator-morphologic-characteristics-in-individuals-with-and-without-forward-head-posture-a-case-control-study
#19
Fariba Khosravi, Anneli Peolsson, Noureddin Karimi, Leila Rahnama
OBJECTIVES: There are several reports suggesting that forward head posture contributes to alterations in scapular kinematics and muscle activity, leading to the development of shoulder problems. Currently, it is unknown whether forward head posture alters the thickness of the scapular muscles. The aim of this study was to compare the thickness of the serratus anterior and upper and lower trapezius muscles at rest and during loaded isometric contractions in individuals with and without forward head posture...
May 15, 2018: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29761312/recovery-of-upper-body-muscle-power-after-short-intensive-exercise-comparing-boys-and-men
#20
Yitzhak Weinstein, Omri Inbar, Ron Mor-Unikovski, Anthony Luder, Gal Dubnov-Raz
PURPOSE: Boys' lower-body muscle power generation (PO) recovers faster than men's following intensive exercise. The purpose of this study was to examine whether boys differ from adult men in recovering from upper-body muscle power generation following intensive exercise. METHODS: Fifteen prepubertal boys (M ± SD age 10.6 ± 1.0 years) and 13 men (31.1 ± 5.0 years) performed two upper-body Wingate Anaerobic Tests (WAnT), separated by either 2-min or 10-min recovery intervals...
May 14, 2018: European Journal of Applied Physiology
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