title: Postural sway under muscle vibration and muscle fatigue in humans.
abstract: Separate studies have demonstrated that vibration and fatigue of ankle muscles alter postural control. The purpose of the present experiment was to investigate the effect of ankle muscle vibration on the regulation of postural sway in bipedal stance following ankle muscle fatigue. Center of foot pressure displacements were recorded using a force platform. Results showed a similar increase in postural sway under muscle fatigue as well as under muscle vibration. Interestingly, under muscle fatigue muscle vibration did not induce a further increase in postural sway. Two hypotheses could, at least, account for this observation: (1). fatigued muscles are less sensitive to muscle vibration and (2). the central nervous system relies less upon proprioceptive information originating from fatigued muscles for regulating postural sway.
authors.affiliation: Laboratoire Sport et Performance Motrice, Université Joseph Fourier-Grenoble1, Grenoble, France.nicols.vuillerme@ujf-grenoble.fr
authors.forename: Nicolas
authors.initials: N
authors.lastname: Vuillerme
authors.forename: Frédéric
authors.initials: F
authors.lastname: Danion
authors.forename: Nicolas
authors.initials: N
authors.lastname: Forestier
authors.forename: Vincent
authors.initials: V
authors.lastname: Nougier
mesh_terms: D000328:Adult; D000842:Ankle / Q000502:physiology; D006801:Humans; D018763:Muscle Fatigue / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D011434:Proprioception / Q000502:physiology*; D014732:Vibration