Clinical Neurophysiology in Motor Unit Firing Control
نویسندگان
چکیده
منابع مشابه
REVIEW Motor Unit Firing Behavior in Man
Studies on motor unit firing behavior in man by the decomposition technique are described. The decomposition technique identifies motor unit firing with 100% accuracy at force levels of greater than 80% maximal voluntary contraction (MVC). In all muscles examined, the higher the recruitment threshold of the motor unit, the lower the rate at which it fired at the target level. Smaller muscles, s...
متن کاملHand dominance and motor unit firing behavior.
Daily preferential use was shown to alter physiological and mechanical properties of skeletal muscle. This study was aimed at revealing differences in the control strategy of muscle pairs in humans who show a clear preference for one hand. We compared the motor unit (MU) recruitment and firing behavior in the first dorsal interosseous (FDI) muscle of both hands in eight male volunteers whose ha...
متن کاملLateral dominance and motor unit firing behavior.
Twelve subjects were classified as left-handed (LH) or right-handed (RH) using Annett's hand dominance classification. Motor unit recordings were obtained from the first dorsal interosseous (FDI) muscle of each hand using a quadrifilar needle electrode. Firing occurrences of individual motor units were then identified and the firing rates of all motor units recorded during the contraction were ...
متن کاملOrdered motor-unit firing behavior in acute cerebellar stroke.
It is known that at any given force level, the lower-threshold motor units generally fire at greater rates than the higher-threshold units during isometric tasks of extremity muscles. In addition to this hierarchical arrangement, firing rates of motor units fluctuate in unison with nearly no time delay; an observation that has led to the concept of common drive, a basic motoneuronal rule. Altho...
متن کاملUnusual motor unit firing behavior in older adults.
Motor unit firing behavior was studied in the first dorsal interosseus (FDI) and tibialis anterior (TA) muscles of 10 aged subjects during slow, isometric contractions. Previous study in younger individuals had shown that motor units are recruited and derecruited in an orderly manner whereby the early-recruited units are the last to be derecruited. However, there were several examples in the ol...
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ژورنال
عنوان ژورنال: The Japanese journal of rehabilitation medicine
سال: 2022
ISSN: ['1881-8560', '1881-3526']
DOI: https://doi.org/10.2490/jjrmc.59.305