keyword
MENU ▼
Read by QxMD icon Read
search

Quadriceps inhibition

keyword
https://www.readbyqxmd.com/read/29846002/corticospinal-and-intracortical-excitability-differ-between-athletes-early-after-aclr-and-matched-controls
#1
Ryan Zarzycki, Susanne M Morton, Charalambos C Charalambous, Adam Marmon, Lynn Snyder-Mackler
Neuromuscular impairments, such as quadriceps weakness and activation deficits, persist after anterior cruciate ligament reconstruction (ACLR). Recent research demonstrating changes in the function of the primary motor cortex after ACLR posits that quadriceps impairments may be influenced by reduced corticospinal excitability. The purpose of this study was to investigate whether the integrity of the neuromotor axis of the vastus medialis is altered in subjects two weeks post-ACLR compared to uninjured control subjects...
May 30, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29809088/kinesio%C3%A2-tape-barrier-does-not-inhibit-intramuscular-cooling-during-cryotherapy
#2
Katie J Lyman, Michael McCrone, Thomas A Hanson, Christopher D Mellinger, Kara Gange
CONTEXT: Allied health care professionals commonly apply cryotherapy as treatment for acute musculoskeletal trauma and the associated symptoms. Understanding the impact of a tape barrier on intramuscular temperature can assist in determining treatment duration for effective cryotherapy. OBJECTIVE: To determine whether Kinesio® Tape acts as a barrier that affects intramuscular temperature during cryotherapy application. DESIGN: A repeated-measures, counterbalanced design in which the independent variable was tape application and the dependent variable was muscle temperature as measured by thermocouples placed 1 cm beneath the adipose layer...
May 29, 2018: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29698291/csa-90-promotes-bone-formation-and-mitigates-methicillin-resistant-staphylococcus-aureus-infection-in-a-rat-open-fracture-model
#3
Rebecca Mills, Tegan L Cheng, Kathy Mikulec, Lauren Peacock, David Isaacs, Carl Genberg, Paul B Savage, David G Little, Aaron Schindeler
BACKGROUND: Infection of open fractures remains a significant cause of morbidity and mortality to patients worldwide. Early administration of prophylactic antibiotics is known to improve outcomes; however, increasing concern regarding antimicrobial resistance makes finding new compounds for use in such cases a pressing area for further research. CSA-90, a synthetic peptidomimetic compound, has previously demonstrated promising antimicrobial action against Staphylococcus aureus in rat open fractures...
June 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29576313/training-induced-changes-in-quadriceps-activation-during-maximal-eccentric-contractions
#4
Dimitrios Voukelatos, Mathew Kirkland, Matthew T G Pain
Despite full voluntary effort, neuromuscular activation of the quadriceps group of muscles appears inhibited during eccentric contractions. A nerve stimulation protocol during dynamic contractions of the quadriceps was developed that employed triplets of supramaximal pulses to assess suppressed eccentric activation. Subsequently the effects of a short training intervention, performed on a dynamometer, on eccentric strength output and neural inhibition were examined. Torque-angular velocity (T-ω) and experimental voluntary neural drive-angular velocity (%VA-ω; %VA, obtained via the interpolated twitch technique) datasets, were obtained from pre- and post-training testing sessions...
May 17, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29526514/facilitation-of-antagonist-motor-output-through-short-latency-sensory-pathways-during-postnatal-development-in-the-mouse
#5
Patrick M Sonner, David R Ladle
Reciprocal inhibition of motor neurons via Ia inhibitory interneurons recruited by stimulation of proprioceptive afferents supplying antagonist muscles has been well described. Changes in the efficacy of inhibition, and sometimes even a switch from inhibition to facilitation, have been reported in the literature after disruption of descending pathways. We sought to test whether such facilitation could be expressed in normal animals by evaluating the presence of facilitation in acute preparations from uninjured animals...
May 1, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29459213/maximal-intensity-exercise-does-not-fully-restore-muscle-pyruvate-dehydrogenase-complex-activation-after-3-days-of-high-fat-dietary-intake
#6
D Constantin-Teodosiu, G Cederblad, M Bergström, P L Greenhaff
BACKGROUND & AIMS: Exercise activates muscle pyruvate dehydrogenase complex (PDC), but moderate intensity exercise fails to fully activate muscle PDC after high-fat diet [1]. We investigated whether maximal intensity exercise overcomes this inhibition. METHODS: Quadriceps femoris muscle biopsy samples were obtained from healthy males at rest, and after 46 and 92 electrically-evoked maximal intermittent isometric contractions, which were preceded by 3 days of either low- (18%) or high- (69%) isocaloric dietary fat intake (LFD and HFD, respectively)...
February 15, 2018: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29389835/effects-of-acute-salbutamol-intake-on-peripheral-and-central-fatigue-in-trained-men
#7
Julien Laurent, Michel Guinot, Thibault Le Roux Mallouf, Mathieu Marillier, Julie Larribaut, Samuel Verges
PURPOSE: Ergogenic effect in physically active subjects has been reported following acute salbutamol (SAL) intake. β2-agonists have potential stimulant effects within the central nervous system that could be involved in this ergogenic effect. We hypothesized that acute SAL intake would induce changes in cerebral responses during exercise, with significant improvement in cerebral oxygenation and voluntary activation (VA) contributing to an increase in muscle performance. METHODS: Fourteen trained male subjects (25 ± 5 years) performed repeated isometric knee extensions until task failure (TF) following 4 mg (oral) SAL, 800 μg (inhaled) SAL, or placebo intake...
January 31, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29332207/skeletal-muscle-expression-of-p43-a-truncated-thyroid-hormone-receptor-%C3%AE-affects-lipid-composition-and-metabolism
#8
François Casas, Gilles Fouret, Jérome Lecomte, Fabienne Cortade, Laurence Pessemesse, Emilie Blanchet, Chantal Wrutniak-Cabello, Charles Coudray, Christine Feillet-Coudray
Thyroid hormone is a major regulator of metabolism and mitochondrial function. Thyroid hormone also affects reactions in almost all pathways of lipids metabolism and as such is considered as the main hormonal regulator of lipid biogenesis. The aim of this study was to explore the possible involvement of p43, a 43 Kda truncated form of the nuclear thyroid hormone receptor TRα1 which stimulates mitochondrial activity. Therefore, using mouse models overexpressing p43 in skeletal muscle (p43-Tg) or lacking p43 (p43-/-), we have investigated the lipid composition in quadriceps muscle and in mitochondria...
February 2018: Journal of Bioenergetics and Biomembranes
https://www.readbyqxmd.com/read/29277394/nitric-oxide-treatment-attenuates-muscle-atrophy-during-hind-limb-suspension-in-mice
#9
Judy E Anderson, Antonia Zhu, Tooru M Mizuno
Debilitating muscle-disuse atrophy in aging or obesity has huge socioeconomic impact. Since nitric oxide (NO) mediates muscle satellite cell activation and induces hypertrophy with exercise in old mice, we tested whether treatment with the NO donor, isosorbide dinitrate (ISDN), during hind limb suspension would reduce atrophy. Mice were suspended 18 days, with or without daily ISDN (66mg/kg). Muscles were examined for atrophy (weight, fiber diameter); regulatory changes in atrogin-1 (a negative regulator of muscle mass), myostatin (inhibits myogenesis), and satellite cell proliferation; and metabolic responses in myosin heavy chains (MyHCs), liver lipid, and hypothalamic gene expression...
February 1, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29215200/mir-424-5p-reduces-ribosomal-rna-and-protein-synthesis-in-muscle-wasting
#10
Martin Connolly, Richard Paul, Roser Farre-Garros, Samantha A Natanek, Susannah Bloch, Jen Lee, Jose P Lorenzo, Harnish Patel, Cyrus Cooper, Avan A Sayer, Stephen J Wort, Mark Griffiths, Michael I Polkey, Paul R Kemp
BACKGROUND: A loss of muscle mass occurs as a consequence of a range of chronic and acute diseases as well as in older age. This wasting results from an imbalance of protein synthesis and degradation with a reduction in synthesis and resistance to anabolic stimulation often reported features. Ribosomes are required for protein synthesis, so changes in the control of ribosome synthesis are potential contributors to muscle wasting. MicroRNAs (miRNAs) are known regulators of muscle phenotype and have been shown to modulate components of the protein synthetic pathway...
April 2018: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/29084391/the-effect-of-rolling-massage-on-the-excitability-of-the-corticospinal-pathway
#11
Saied J Aboodarda, Rebecca M Greene, Devin T Philpott, Ramandeep S Jaswal, Guillaume Y Millet, David G Behm
The aim of the present study was to investigate the alterations of corticospinal excitability (motor evoked potential, MEP) and inhibition (silent period, SP) following rolling massage of the quadriceps muscles. Transcranial magnetic and femoral nerve electrical stimuli were used to elicit MEPs and compound muscle action potential (Mmax) in the vastus lateralis and vastus medialis muscles prior to and following either (i) 4 sets of 90-s rolling massage (ROLLING) or (ii) rest (CONTROL). One series of neuromuscular evaluations, performed after each set of ROLLING or CONTROL, included 3 MEPs and 1 Mmax elicited every 4 s during 15-s submaximal contractions at 10% (experiment 1, n = 16) and 50% (experiment 2, n = 10) of maximal voluntary knee extensions (MVC)...
April 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29078808/treatment-with-the-anti-il-6-receptor-antibody-attenuates-muscular-dystrophy-via-promoting-skeletal-muscle-regeneration-in-dystrophin-utrophin-deficient-mice
#12
Eiji Wada, Jun Tanihata, Akira Iwamura, Shin'ichi Takeda, Yukiko K Hayashi, Ryoichi Matsuda
BACKGROUND: Chronic increases in the levels of the inflammatory cytokine interleukin-6 (IL-6) in serum and skeletal muscle are thought to contribute to the progression of muscular dystrophy. Dystrophin/utrophin double-knockout (dKO) mice develop a more severe and progressive muscular dystrophy than the mdx mice, the most common murine model of Duchenne muscular dystrophy (DMD). In particular, dKO mice have smaller body sizes and muscle diameters, and develop progressive kyphosis and fibrosis in skeletal and cardiac muscles...
October 27, 2017: Skeletal Muscle
https://www.readbyqxmd.com/read/29037643/immediate-effect-of-common-peroneal-nerve-electrical-stimulation-on-quadriceps-muscle-arthrogenic-inhibition-in-patients-with-knee-osteoarthritis
#13
Hossein Rafsanjani, Khosro Khademi-Kalantari, Asghar Rezasoltani, Sedigheh Sadat Naimi, Mehri Ghasemi, Shapour Jaberzadeh
OBJECTIVE: To investigate the immediate effect of electrical stimulation of the common peroneal nerve on the maximum voluntary activation of the quadriceps muscle in patients with knee osteoarthritis. METHODOLOGY: Fifteen subjects with knee osteoarthritis (mean age: 50.5 ± 13 years) participated in this study. To measure the arthrogenic inhibition ratio of quadriceps, a burst of electrical stimulation was superimposed on the maximum voluntary contraction, and the percentage of change in the force production was computed...
October 2017: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29032903/single-shot-femoral-nerve-block-does-not-cause-long-term-strength-and-functional-deficits-following-anterior-cruciate-ligament-reconstruction
#14
Kelechi R Okoroha, Lafi Khalil, Edward K Jung, Robert A Keller, Nathan E Marshall, Moneer Abouljoud, Derek Chan, Vasilios Moutzouros
PURPOSE: To determine if patients treated with a single-shot femoral nerve block have strength and functional deficits at 9-month follow-up. METHODS: Forty-three patients who underwent primary anterior cruciate ligament reconstructions were randomized to receive either a preoperative single-shot femoral nerve block or local infiltration anesthesia for primary pain control. All patients underwent a standardized comprehensive rehabilitation program postoperatively...
January 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29019442/the-use-of-hamstring-fatigue-to-reduce-quadriceps-inhibition-after-anterior-cruciate-ligament-reconstruction
#15
Timothy Lowe, Xuanliang Neil Dong
Arthrogenic muscle inhibition, an inability to fully activate the quadriceps muscles, has been persistently observed after anterior cruciate ligament reconstruction (ACLr) surgery. Reductions in quadriceps activation may be partly due to the flexion reflex pathway, hamstrings activation, and reciprocal quadriceps inhibition. Since central fatigue has been shown to modify hamstring excitability and change the hamstring reflex response, hamstring fatigue might alleviate quadriceps muscle inhibition by counteracting the flexion reflex...
February 2018: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/28984049/mir-422a-suppresses-smad4-protein-expression-and-promotes-resistance-to-muscle-loss
#16
Richard Paul, Jen Lee, Anna V Donaldson, Martin Connolly, Mohammad Sharif, Samantha Amanda Natanek, Ulrich Rosendahl, Michael I Polkey, Mark Griffiths, Paul R Kemp
BACKGROUND: Loss of muscle mass and strength are important sequelae of chronic disease, but the response of individuals is remarkably variable, suggesting important genetic and epigenetic modulators of muscle homeostasis. Such factors are likely to modify the activity of pathways that regulate wasting, but to date, few such factors have been identified. METHODS: The effect of miR-422a on SMAD4 expression and transforming growth factor (TGF)-β signalling were determined by western blotting and luciferase assay...
February 2018: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/28976889/the-dinoponeratoxin-peptides-from-the-giant-ant-dinoponera-quadriceps-display-in-vitro-antitrypanosomal-activity
#17
Dânya Bandeira Lima, Clarissa Perdigão Mello, Izabel Cristina Justino Bandeira, Ramon Róseo Paula Pessoa Bezerra de Menezes, Tiago Lima Sampaio, Cláudio Borges Falcão, Jean-Étienne R L Morlighem, Gandhi Rádis-Baptista, Alice Maria Costa Martins
The crude venom of the giant ant Dinoponera quadriceps is a cocktail of polypeptides and organic compounds that shows antiparasitic effects against Trypanosoma cruzi, the causative agent of Chagas disease. In order to investigate the venom-derived components responsible for such antitrypanosomal activity, four dinoponeratoxins (DnTxs) were identified, namely M-PONTX-Dq3a, -Dq3b, -Dq3c and -Dq4e, that are diverse in size, net charge, hydrophobicity and propensity to interact with eukaryote cell membranes. These peptides were tested against epimastigote, trypomastigote and amastigote forms of benznidazole (Bz)-resistant Y strain of T...
January 26, 2018: Biological Chemistry
https://www.readbyqxmd.com/read/28869034/plasticity-and-function-of-human-skeletal-muscle-in-relation-to-disuse-and-rehabilitation-influence-of-ageing-and-surgery
#18
Charlotte Suetta
In order to study the influence of disuse and aging on skeletal muscle homeostasis, different human models were employed. Effects of chronic disuse were investigated in elderly patients suffering from uni-lateral hip-osteoarthritis, whereas the effect of short-term disuse (4 and 14 days of unilateral lower limb immobilisation) was assessed in healthy young and old individuals. In summary, chronic muscle disuse in the elderly was associated with marked quantitative as well as qualitative neuromuscular impairments...
August 2017: Danish Medical Journal
https://www.readbyqxmd.com/read/28809518/microrna-542-promotes-mitochondrial-dysfunction-and-smad-activity-and-is-elevated-in-intensive-care-unit-acquired-weakness
#19
Roser Farre Garros, Richard Paul, Martin Connolly, Amy Lewis, Benjamin E Garfield, S Amanda Natanek, Susannah Bloch, Vincent Mouly, Mark J Griffiths, Michael I Polkey, Paul R Kemp
RATIONALE: Loss of skeletal muscle mass and function is a common consequence of critical illness and a range of chronic diseases, but the mechanisms by which this occurs are unclear. OBJECTIVES: To identify microRNAs (miRNAs) that were increased in the quadriceps of patients with muscle wasting and to determine the molecular pathways by which they contributed to muscle dysfunction. METHODS: miRNA-542-3p/5p (miR-542-3p/5p) were quantified in the quadriceps of patients with chronic obstructive pulmonary disease and intensive care unit-acquired weakness (ICUAW)...
December 1, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28791612/acl-rehabilitation-progression-where-are-we-now
#20
REVIEW
John T Cavanaugh, Matthew Powers
PURPOSE OF REVIEW: With the increase of publications available to the rehabilitation specialist, there is a need to identify a progression to safely progress the patient through their post-operative ACL reconstruction rehabilitation program. Rehabilitation after ACL reconstruction should follow an evidence-based functional progression with graded increase in difficulty in activities. RECENT FINDINGS: Clinicians should be discouraged not to use strict time frames and protocols when treating patients following ACL reconstruction...
September 2017: Current Reviews in Musculoskeletal Medicine
keyword
keyword
14620
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"