Changes in Muscle Architecture of Vastus Lateralis Muscle during Fatiguing Contractions
نویسندگان
چکیده
منابع مشابه
Firing rates of motor units in human vastus lateralis muscle during fatiguing isometric contractions.
We investigated the firing rate of motor units in the vastus lateralis muscle in five healthy young men (mean = 21.4 yr, SD = 0.9) during a sequence of isometric constant-torque contractions repeated to exhaustion. The contractions were sustained at 20% of the maximal voluntary level, measured at the beginning of the test sequence. Electromyographic (EMG) signals were recorded via quadrifilar f...
متن کاملRecruitment order of motor units in human vastus lateralis muscle is maintained during fatiguing contractions.
Motor-unit firing patterns were studied in the vastus lateralis muscle of five healthy young men [21.4 +/- 0.9 (SD) yr] during a series of isometric knee extensions performed to exhaustion. Each contraction was held at a constant torque level, set to 20% of the maximal voluntary contraction at the beginning of the experiment. Electromyographic signals, recorded via a quadrifilar fine wire elect...
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The study compared changes in intramuscular and surface recordings of EMG amplitude with ultrasound measures of muscle architecture of the elbow flexors during a submaximal isometric contraction. Ten subjects performed a fatiguing contraction to task failure at 20% of maximal voluntary contraction force. EMG activity was recorded in biceps brachii, brachialis, and brachioradialis muscles using ...
متن کاملMuscle phenotype is related to motor unit behavior of the vastus lateralis during maximal isometric contractions
Previous investigations have reported a relationship between skeletal muscle phenotype and motor unit (MU) firing parameters during submaximal contractions. The purpose of the current investigation, however, was to examine the relationships between motor unit firing behavior during a maximal voluntary contraction, Myosin Heavy Chain (MHC) isoform content, and various molecular neuromuscular tar...
متن کاملPrimary hydatid cyst of vastus lateralis muscle.
Musculoskeletal system is rarely involved by hydatid cyst,the larval form of Echinococcus Granulosus. A 37-year old man was diagnosed as having a cystic mass within his left thigh musculature. Preoperative computerized tomography suggested an unusual location of echinococcus although serology could not confirm the diagnosis. During surgery, a white coloured cyst within left vastus lateralis mus...
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ژورنال
عنوان ژورنال: Rigakuryoho Kagaku
سال: 2011
ISSN: 1341-1667,2434-2807
DOI: 10.1589/rika.26.781