Motor unit recruitment and firing rates interaction in the control of human muscles.
Brain Res
; 337(2): 311-9, 1985 Jul 01.
Article
em En
| MEDLINE
| ID: mdl-3161581
ABSTRACT
Muscle contractions are modulated by the number of motor units recruited and their respective firing rates. The work described in this report documents an interplay between recruitment and firing rates of motor units. The recruitment of a new motor unit appears to have a disfacilitatory influence on the firing rates of previously activated motor units. It is speculated that this effect is likely to be mediated, at least partially, via the stretch reflex loop and possibly by the recurrent inhibition of the Renshaw circuit. Such a mechanism would be functionally useful in providing smooth control of muscle output via peripheral circuitry (consisting of proprioceptive reflexes and recurrent inhibition), thus lessening the amount of detailed supervision of the alpha-motoneuron pool required by the central nervous system.
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Base de dados:
MEDLINE
Assunto principal:
Recrutamento Neurofisiológico
/
Neurônios Motores
/
Músculos
/
Condução Nervosa
Limite:
Adult
/
Humans
/
Male
Idioma:
En
Revista:
Brain Res
Ano de publicação:
1985
Tipo de documento:
Article