title: Adaptation of postural control while standing on a narrow unfixed base of support.
abstract: The purpose of this study was to investigate the adaptation with practice of postural control while standing on a rocker board. Thirteen healthy young adults participated. The participants were asked to stand in a sagittal plane on a rocker board with a semicircular base as steadily as possible for as long as they could. With practice, the duration of maintaining postural balance increased significantly and postural stability improved (P<0.05). Furthermore, the distances between center of pressure and the projection of center of mass decreased (P<0.05), although joint motion of the lower extremities did not change (P>0.05). This observation would be the consequence of a highly redundant human locomotor system. With practice, the central nervous system was able to shift the center of pressure position close to the accurate center of mass position.
authors.affiliation: aDepartment of Rehabilitation Science, Faculty of Health Sciences, Sapporo, Japan bDepartment of Physical Therapy, College of Health Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan cGraduate School of Health Sciences, Hokkaido University, Sapporo, Japan.
authors.forename: Hiroki
authors.initials: H
authors.lastname: Mani
authors.forename: Shih-Fen
authors.initials: SF
authors.lastname: Hsiao
authors.forename: Tomoya
authors.initials: T
authors.lastname: Konishi
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Izumi
authors.forename: Akiyo
authors.initials: A
authors.lastname: Tsuda
authors.forename: Naoya
authors.initials: N
authors.lastname: Hasegawa
authors.forename: Kenta
authors.initials: K
authors.lastname: Takeda
authors.forename: Noriyo
authors.initials: N
authors.lastname: Colley
authors.forename: Tadayoshi
authors.initials: T
authors.lastname: Asaka
mesh_terms: D000222:Adaptation, Physiological; D000328:Adult; D001696:Biomechanical Phenomena / Q000502:physiology; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D004856:Postural Balance / Q000502:physiology*; D055815:Young Adult