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Arquivos de Neuro-Psiquiatria

Print version ISSN 0004-282X

Abstract

PANIZZA, Marcela E. et al. Evaluation of central and peripheric factors in muscular fatigue. Arq. Neuro-Psiquiatr. [online]. 1983, vol.41, n.3, pp.241-245. ISSN 0004-282X.  http://dx.doi.org/10.1590/S0004-282X1983000300003.

Muscular fatigue was investigated in 13 healthy people by employing a simple device which comprises a computer on line with a conventional EMG equipment able to automatically measure the frequency and duration of free-run EMG recording. The procedure was carried out in the extensor digitorum brevis muscle by using surface electrodes throughout 10 minutes of voluntary maximal effort. The maximal M wave as well as the muscle response to repetitive nerve maximal stimulation was also explored at the beginning and at the end of the experiment. It was observed a decrease of the potentials frequency discharge and an increase of their duration without major changes in the M wave amplitude neither in the muscle response to the repetitive nerve discharge. The findings pointed out to the central factors as the main responsible for the development of muscular fatigue.

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