title: [Changes in postural control mechanism after a long-time tilt].
abstract: In order to investigate the time-dependent dynamics of otolith organ-spinomotor function, we analyzed postural control biomechanically, in eight healthy adult volunteers, using a dynamic posturography (EquiTest System), before and after a four-hours lateral head and body tilt (90 degrees). After the tilt, a half of the subjects exhibited some changes. Their equilibrium scores decreased; i.e., the dependence on their vestibular inputs decreased, but in contrast, those on the visual and the somatosensory inputs increased. These changes were diminished by repeating the tests along the time course. The present findings confirmed [correction of comfirmed] the importance of vestibular gravity information for the maintenance of delicate postural stability.
authors.affiliation: Department of Otorhinolaryngology, Nihon University School of Medicine, Itabashi-ku, Tokyo, Japan.
authors.forename: Kazue
authors.initials: K
authors.lastname: Hida
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Nomura
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Watanabe
authors.forename: Makoto
authors.initials: M
authors.lastname: Igarashi
authors.forename: Manabu
authors.initials: M
authors.lastname: Mogitate
authors.forename: Masamichi
authors.initials: M
authors.lastname: Sudoh
authors.forename: Chiharu
authors.initials: C
authors.lastname: Sekiguchi
authors.forename: Akinori
authors.initials: A
authors.lastname: Kida
mesh_terms: D000328:Adult; D006112:Gravitation; D006801:Humans; D009949:Orientation / Q000502:physiology; D010037:Otolithic Membrane / Q000502:physiology; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D016683:Supine Position; D018667:Tilt-Table Test; D013997:Time Factors; D014722:Vestibule, Labyrinth / Q000502:physiology*