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https://www.readbyqxmd.com/read/27912940/panax-ginseng-and-salvia-miltiorrhiza-supplementation-during-eccentric-resistance-training-in-middle-aged-and-older-adults-a-double-blind-randomized-control-trial
#1
Hsin-Fu Lin, Chun-Chung Chou, Hsiao-Han Chao, Hirofumi Tanaka
BACKGROUND: Muscle damage induced by an acute bout of eccentric exercise results in transient arterial stiffening. In this study, we sought to determine the effects of progressive eccentric resistance exercise training on vascular functions, and whether herb supplementation would enhance training adaptation by ameliorating the arterial stiffening effects. METHODS: By using a double-blinded randomized placebo-controlled design, older adults were randomly assigned to either the Panax ginseng and Salvia miltiorrhiza supplementation group (N=12) or the placebo group (N=11)...
December 2016: Complementary Therapies in Medicine
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
#2
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/27903814/blink-associated-contralateral-eccentric-saccades-as-a-rare-sign-of-unilateral-brain-injury
#3
Ilaria Zivi, Eugenio Bertelli, Giacinta Bilotti, Ignazio Alessandro Clemente, Leopold Saltuari, Giuseppe Frazzitta
OBJECTIVE: To describe a rare sign of unilateral brain injury as a form of unwanted blink-associated contralateral eccentric saccades. METHODS: A 62-year-old patient who underwent an ischemic stroke affecting the entire right middle cerebral artery territory came to our attention 1 year after stroke, manifesting with transient contralateral conjugate gaze deviations associated with spontaneous blinking. We complemented the regular neurologic evaluation with brain MRI, study of evoked potentials, electroneurography of the facial nerve, and infrared video-oculoscopy...
November 30, 2016: Neurology
https://www.readbyqxmd.com/read/27901059/negative-axial-strain-sensitivity-in-gold-coated-eccentric-fiber-bragg-gratings
#4
Karima Chah, Damien Kinet, Christophe Caucheteur
New dual temperature and strain sensor has been designed using eccentric second-order fiber Bragg gratings produced in standard single-mode optical fiber by point-by-point direct writing technique with tight focusing of 800 nm femtosecond laser pulses. With thin gold coating at the grating location, we experimentally show that such gratings exhibit a transmitted amplitude spectrum composed by the Bragg and cladding modes resonances that extend in a wide spectral range exceeding one octave. An overlapping of the first order and second order spectrum is then observed...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27900503/custom-made-mouth-prop-for-tmj-arthrocentesis-a-technical-note
#5
Shakil Ahmed Nagori, P K Chattopadhyay, Saurav Kumar, K Kamalpathey
INTRODUCTION: TMJ arthrocentesis involves lavage of the upper joint space which forces the disc apart from the fossa and washes away the inflammatory components of the joint. To increase the joint space during arthrocentesis, the patient is usually asked to open the mouth and deviate it to the opposite side so as to distract the condyle from the glenoid fossa thereby increasing joint space. METHOD: The authors describe a simple and rapid technique of preparing a custom-made mouth prop to hold the mandible in eccentric position during arthrocentesis...
November 29, 2016: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27900297/effects-of-lymphatic-drainage-and-local-cryo-exposition-regeneration-after-high-intensive-exercises
#6
Michael Behringer, Diana Jedlicka, Molly McCourt, Matthias Ring, Joachim Mester
BACKGROUND: Recovery from exercise and competition is important in sports medicine, particularly when rest periods are short. The objective is to determine the efficacy of cryo exposition (CRY) and manual lymphatic drainage (MLD) to hasten short term recovery of muscle performance after eccentric contractions. METHODS: In a randomized controlled trial, 30 healthy sport students (21 males, 9 females; age: 25.7±2.8 years) performed 4×20 eccentric contractions of knee extensors, followed by 30 min MLD, CRY, or rest (RST) under controlled laboratory environment...
April 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/27900292/hypoxia-inhibits-primary-cilia-formation-and-reduces-cell-mediated-contraction-in-stress-deprived-rat-tail-tendon-fascicles
#7
Michael Lavagnino, Anna N Oslapas, Keri L Gardner, Steven P Arnoczky
BACKGROUND: Hypoxia, which is associated with chronic tendinopathy, has recently been shown to decrease the mechanosensitivity of some cells. Therefore, the purpose of this study was to determine the effect of hypoxia on the formation of elongated primary cilia (a mechanosensing organelle of tendon cells) in vitro and to determine the effect of hypoxia on cell-mediated contraction of stress-deprived rat tail tendon fascicles (RTTfs). METHODS: Tendon cells isolated from RTTfs were cultured under normoxic (21% O2) or hypoxic (1% O2) conditions for 24 hours...
April 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/27899894/moderate-load-eccentric-exercise-a-distinct-novel-training-modality
#8
REVIEW
Hans Hoppeler
Over the last 20 years a number of studies have been published using progressive eccentric exercise protocols on motorized ergometers or similar devices that allow for controlled application of eccentric loads. Exercise protocols ramp eccentric loads over an initial 3 weeks period in order to prevent muscle damage and delayed onset muscle soreness. Final training loads reach 400-500 W in rehabilitative settings and over 1200 W in elite athletes. Training is typically carried out three times per week for durations of 20-30 min...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27899887/saccadic-adaptation-alters-the-attentional-field
#9
Farahnaz A Wick, Tyler W Garaas, Marc Pomplun
It is currently unknown whether changes to the oculomotor system can induce changes to the distribution of spatial attention around a fixated target. Previous studies have used perceptual performance tasks to show that adaptation of saccadic eye movements affects dynamic properties of visual attention, in particular, attentional shifts to a cued location. In this study, we examined the effects of saccadic adaptation on the static distribution of visual attention around fixation (attentional field). We used the classic double step adaptation procedure and a flanker task to test for differences in the attentional field after forward and backward adaptation...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27899713/when-do-individuals-with-autism-spectrum-disorder-show-superiority-in-visual-search
#10
Aya Shirama, Nobumasa Kato, Makio Kashino
Although superior visual search skills have been repeatedly reported for individuals with autism spectrum disorder, the underlying mechanisms remain controversial. To specify the locus where individuals with autism spectrum disorder excel in visual search, we compared the performance of autism spectrum disorder adults and healthy controls in briefly presented search tasks, where the search display was replaced by a noise mask at a stimulus-mask asynchrony of 160 ms to interfere with a serial search process while bottom-up visual processing remains intact...
November 29, 2016: Autism: the International Journal of Research and Practice
https://www.readbyqxmd.com/read/27897404/doxorubicin-inhibits-muscle-inflammation-after-eccentric-exercise
#11
Sheng-Chih Huang, Jin-Fu Wu, Suchada Saovieng, Wei-Horng Chien, Ming-Fen Hsu, Xiao-Fei Li, Shin-Da Lee, Chih-Yang Huang, Chih-Yang Huang, Chia-Hua Kuo
BACKGROUND: Doxorubicin, a widely used anti-tumour drug, is known to cause muscle loss in cancer patients. METHODS: Following an acute dose of doxorubicin injection (2.5 mg/kg per body weight), we examined macrophage distribution in rat soleus muscle challenged by eccentric exercise (downhill running). Long-term doxorubicin treatment (one injection every 3 days) on muscle mass and survival were also determined. RESULTS: Under non-exercised condition, increased tumour necrosis factor (TNF)-alpha mRNA and decreased IL-10 mRNA were observed in soleus muscle of doxorubicin-treated rats, compared with saline-treated control rats...
October 10, 2016: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/27895590/brain-functional-connectivity-is-different-during-voluntary-concentric-and-eccentric-muscle-contraction
#12
Wan X Yao, Zhiguo Jiang, Jinqi Li, Changhao Jiang, Crystal G Franlin, Jack L Lancaster, Yufei Huang, Guang H Yue
Previous studies report greater activation in the cortical motor network in controlling eccentric contraction (EC) than concentric contraction (CC) of human skeletal muscles despite lower activation level of the muscle associated with EC. It is unknown, however, whether the strength of functional coupling between the primary motor cortex (M1) and other involved areas in the brain differs as voluntary movements are controlled by a network of regions in the primary, secondary and association cortices. Examining fMRI-based functional connectivity (FC) offers an opportunity to measure strength of such coupling...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27893481/the-effect-of-exercise-induced-muscle-damage-after-a-bout-of-accentuated-eccentric-load-drop-jumps-and-the-repeated-bout-effect
#13
Lee A Bridgeman, Nicholas D Gill, Deborah K Dulson, Michael R McGuigan
Although previous studies have investigated exercise induced muscle damage (EIMD) after a bout of unloaded drop jumps (DJ) none have investigated the effects of accentuated eccentric load (AEL) DJs on EIMD. The purpose of this study was to investigate the effects of 30 and 50 AEL DJs on strength, jump performance, muscle soreness and blood markers. Eight resistance trained athletes participated in this study. In week 1 baseline countermovement jump (CMJ), squat jump (SJ), concentric and eccentric peak force (PF), creatine kinase (CK) and muscle soreness (SOR) were assessed...
November 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27893478/loads-and-movement-speeds-dictate-differences-in-power-output-during-circuit-training
#14
Kirk B Roberson, Sean Chowdhari, Morgan White, Joseph F Signorile
Power training has become a common exercise intervention for improving muscle strength, power, and physical function, while reducing injury risk. Few studies, however, have evaluated acute load changes on power output during traditional resistance-training protocols. Therefore, the aim of this study was to quantify the effects of different loading patterns on power output during a single session of circuit resistance training (CRT). Nine males (age=19.4±0.9 y) and eleven females (age=20.6±1.6 y) completed three CRT protocols during separate testing sessions using seven pneumatic exercises...
November 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27893476/comparison-of-muscle-involvement-and-posture-between-the-conventional-deadlift-and-a-walk-in-style-deadlift-machine
#15
Benjamin J Snyder, Courtney P Cauthen, Scott R Senger
The deadlift exercise is one of the most effective exercises for developing lower-body strength; however, technique errors can lead to low back injuries. The use of a 'walk-in' deadlift machine removes the weight bar by using a lever system with independent handles on either side of the body. Theoretically, this would allow alignment of the load with the center of gravity, encouraging a more upright torso and decreasing the involvement of the low back extensors. This study compared trunk angle, knee angle and electrical activity of key muscles between the conventional deadlift (CDL) and two foot positions (ball of foot or toe alignment) with pronated grip, (called BallPro and ToePro) of a walk-in deadlift machine among high-skilled and low-skilled lifters...
November 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27893100/do-intense-perimetric-stimuli-saturate-the-healthy-visual-system
#16
Andrew J Anderson, Allison M McKendrick, Andrew Turpin
Purpose: A recent proposal for why glaucomatous perimetric sensitivities of approximately 15 to 19 dB or less are unreliable involves the idea that the neural response of normal retinal ganglion cells saturates for intense perimetric stimuli. A predicted consequence of this saturation is that the neural response for two different high intensity stimuli will be the same, leading to an inability to discriminate between them. We test that prediction. Methods: We used a two-interval forced-choice method of constant stimuli (7 steps, 40 presentations/step) to measure the ability of four healthy observers to discriminate between different intensity Size III perimetric stimuli at 0°, 9°, and 21° eccentricity...
November 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27888664/ebv-associated-but-hhv8-unrelated-double-hit-effusion-based-lymphoma
#17
Bo-Jung Chen, David Yen-Ting Chen, Chun-Chi Kuo, Shih-Sung Chuang
Effusion-based lymphoma is a rare and unique type of large B-cell lymphoma presenting in effusion without a mass lesion. It shares many clinicopathological features with primary effusion lymphoma (PEL), but is distinct from PEL by the absence of HHV8 association. Double hit lymphoma (DHL) is an aggressive B-cell lymphoma, defined by concurrent rearrangement of MYC and BCL2 or BCL6. DHL often presents as lymphadenopathy or an extranodal mass, but rarely occurs in effusion. Here we report a 61-year-old male with alcoholic cirrhosis presenting as massive ascites and left pleural effusion...
November 26, 2016: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/27886838/biceps-and-triceps-ruptures-in-athletes
#18
REVIEW
Jared R Thomas, Jeffrey Nathan Lawton
Although rare, biceps and triceps tendon ruptures constitute significant injuries that can lead to profound disability if left untreated, especially in the athletic population. Biceps rupture is more common than triceps rupture, with both resulting from a forceful eccentric load. Surgical repair is the treatment method of choice for tendinous ruptures in athletes. Nonoperative management is rarely indicated in this population and is typically reserved for individuals with partial ruptures that quickly regain strength and function...
February 2017: Hand Clinics
https://www.readbyqxmd.com/read/27884955/effect-of-exercise-induced-muscle-damage-on-vascular-function-and-skeletal-muscle-microvascular-deoxygenation
#19
Jacob T Caldwell, Garrett C Wardlow, Patrece A Branch, Macarena Ramos, Christopher D Black, Carl J Ade
This paper investigated the effects of unaccustomed eccentric exercise-induced muscle damage (EIMD) on macro- and microvascular function. We tested the hypotheses that resting local and systemic endothelial-dependent flow-mediated dilation (FMD) and microvascular reactivity would decrease, V˙O2max would be altered, and that during ramp exercise, peripheral O2 extraction, evaluated via near-infrared-derived spectroscopy (NIRS) derived deoxygenated hemoglobin + myoglobin ([HHb]), would be distorted following EIMD In 13 participants, measurements were performed prior to (Pre) and 48 h after a bout of knee extensor eccentric exercise designed to elicit localized muscle damage (Post)...
November 2016: Physiological Reports
https://www.readbyqxmd.com/read/27878064/cavernous-hemangioma-of-the-rib-a-case-report
#20
Joon Young Park, Jin Gyoon Park, Seung Jin Lee
Hemangioma of the rib is a rare benign vascular tumor. Herein, we report a 63-year-old man presenting with hemangioma of the left sixth rib. An osteolytic eccentric expansive mass with calcification and focal cortical disruption was detected on chest computed tomography (CT). The mass showed low 2-deoxy-2-[18F]-fluoro-D-glucose (18F-FDG) avidity on positron emission tomography. The patient underwent resection of the left sixth rib. Based on the histopathology findings, a diagnosis of cavernous hemangioma was made...
July 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
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