期刊
JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY
卷 21, 期 2, 页码 208-219出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jelekin.2010.10.006
关键词
Control strategies; Voluntary muscle activation; Motor unit; Muscle fatigue; Stretch reflexes
资金
- National Institute on Neurological Disorders and Stroke [NS43275]
- EU [251555]
- Fonds National de la Recherche Scientifique of Belgium and Research Council of the Universite Libre de Bruxelles
Despite 100 years of research since the seminal work of Angelo Mosso (1846-1910), our understanding of the interactions between the nervous system and muscle during the performance of fatiguing contractions remains rather rudimentary. Although the nervous system simply needs to provide an activation signal that will elicit the net muscle torque required for a prescribed action, changes in the number and diversity of synaptic inputs that must be integrated by the spinal motor neurons to accommodate the changes in the force-producing capabilities of the muscle fibers complicate the process of generating the requisite activation signal. This brief review examines two ways in which the activation signal can be compromised during sustained contractions and thereby contribute to the rate at which the muscles fatigue. These examples provide insight on the types of adjustments that occur in the nervous system during fatiguing contractions, but emphasize that much remains to be learned about the physiological processes that contribute to the phenomenon known as muscle fatigue. (C) 2010 Published by Elsevier Ltd.
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