Twitch and M-wave potentiation induced by intermittent maximal voluntary quadriceps contractions: Differences between direct quadriceps and femoral nerve stimulation.

Détails

ID Serval
serval:BIB_77B1715D9719
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Twitch and M-wave potentiation induced by intermittent maximal voluntary quadriceps contractions: Differences between direct quadriceps and femoral nerve stimulation.
Périodique
Muscle and Nerve
Auteur(s)
Rodriguez-Falces J., Maffiuletti N.A., Place N.
ISSN
1097-4598 (Electronic)
ISSN-L
0148-639X
Statut éditorial
Publié
Date de publication
2013
Peer-reviewed
Oui
Volume
48
Numéro
6
Pages
920-929
Langue
anglais
Résumé
Introduction: To investigate differences in twitch and M-wave potentiation in the quadriceps femoris when electrical stimulation is applied over the quadriceps muscle belly versus the femoral nerve trunk. Methods: M-waves and mechanical twitches were evoked using direct quadriceps muscle and femoral nerve stimulation between 48 successive isometric maximal voluntary contractions (MVC) from 10 young, healthy subjects. Potentiation was investigated by analyzing the changes in M-wave amplitude recorded from the vastus medialis (VM) and vastus lateralis (VL) muscles and in quadriceps peak twitch force. Results: Potentiation of twitch, VM M-wave, and VL M-wave were greater for femoral nerve than for direct quadriceps stimulation (P<0.05). Despite a 50% decrease in MVC force, the amplitude of the M-waves increased significantly during exercise. Conclusions: In addition to enhanced electrogenic Na(+) -K(+) pumping, other factors (such as synchronization in activation of muscle fibers and muscle architectural properties) might significantly influence the magnitude of M-wave enlargement. © 2013 Wiley Periodicals, Inc.
Pubmed
Web of science
Création de la notice
20/09/2013 9:29
Dernière modification de la notice
03/03/2018 18:28
Données d'usage