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Facilitation of Nerve Action Potential by Distant Muscle Contraction
Artigo em Coreano | WPRIM (Pacífico Ocidental) | ID: wpr-723590
Biblioteca responsável: WPRO
ABSTRACT

OBJECTIVE:

To investigate the effect of distant muscle contraction on the sensory and motor nerve conduction and F-wave studies.

METHOD:

During isometric contraction (10%, 25% and 50% of maximal voluntary contraction) of dominant hand using hand held dynamometer, sensory nerve action potentials (SNAPs), compound muscle action potentials (CMAPs) and F-waves were examined on contralateral upper and ipsilateral lower extremities in 20 healthy adult subjects. SNAPs of median and sural nerves, CMAPs and F-waves of median and tibial nerves were recorded with submaximal and supramaximal intensity stimulation.

RESULTS:

At submaximal stimulation the amplitudes and areas of median and sural SNAPs and median nerve CMAPs were significantly increased during distant muscle contraction (p<0.05). Distant muscle contraction did not effect on the parameters of SNAPs and CMAPs at supramaximal stimulation. The latencies of F-waves were significantly shortened and amplitudes of F-waves were increased during distant muscle contraction (p<0.05). Especially the amplitudes of F-waves were significantly positive correlated with the level of muscle contraction (p<0.05).

CONCLUSION:

SNAPs and CMAP were augmented by the distant muscle contraction only submaximal stimulation. Due to facilitation, the distant muscle contraction should be considered during routine F-wave studies.
Assuntos

Texto completo: Disponível Base de dados: WPRIM (Pacífico Ocidental) Assunto principal: Nervo Sural / Nervo Tibial / Potenciais de Ação / Extremidade Inferior / Mãos / Contração Isométrica / Nervo Mediano / Contração Muscular / Condução Nervosa Limite: Adulto / Humanos Idioma: Coreano Revista: Journal of the Korean Academy of Rehabilitation Medicine Ano de publicação: 2004 Tipo de documento: Artigo
Texto completo: Disponível Base de dados: WPRIM (Pacífico Ocidental) Assunto principal: Nervo Sural / Nervo Tibial / Potenciais de Ação / Extremidade Inferior / Mãos / Contração Isométrica / Nervo Mediano / Contração Muscular / Condução Nervosa Limite: Adulto / Humanos Idioma: Coreano Revista: Journal of the Korean Academy of Rehabilitation Medicine Ano de publicação: 2004 Tipo de documento: Artigo
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