Differences in rapid initiation and termination of voluntary postural sway associated with ageing and falls-risk

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Title Differences in rapid initiation and termination of voluntary postural sway associated with ageing and falls-risk
Author Tucker, Murray; Kavanagh, Justin; Morrison, Steven; Barrett, Rod
Journal Name Journal of Motor Behavior
Editor Richard G. Carson, Robert L. Sainburg, Dagmar Sternad
Year Published 2010
Place of publication United States
Publisher Routledge
Abstract The authors examined differences between young adults (n = 25) and healthy older adults (n = 48) in reaction time and the relations between center of pressure (COP) and center of mass (COM) motions during rapid initiation and termination of voluntary postural sway. Older adults were divided into low and high falls-risk groups based on Physiological Profile Assessment scores of sensorimotor function. Low falls-risk older adults had slower reaction times during anteroposterior sway initiation and decreased COP-COM separation during anteroposterior and medialateral sway initiation and anteroposterior continuous voluntary sway compared with young adults. High falls-risk older adults had slower initiation and termination reaction times in all response directions and decreased COP-COM separation during sway initiation and continuous voluntary sway in the anteroposterior and medialateral directions compared with young adults. Compared with low falls-risk older adults, high falls-risk older adults had slower initiation and termination reaction times in all response directions and decreased COP-COM separation during medialateral continuous voluntary sway. Reaction time and COP-COM measures significantly predicted group status in discriminant models with sensitivities and specificities of 72-100%. Overall, these findings highlight important associations of age-related declines in sensorimotor function related to an increased risk of falling with slower postural reaction time and reduced postural stability.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1080/00222895.2010.503252
Copyright Statement Copyright 2010 Routledge. This is an electronic version of an article published in Journal of Motor Behavior, Volume 42, Issue 5 September 2010 , pages 277 - 287. Journal of Motor Behavior is available online at: http://www.informaworld.com with the open URL of your article.
Volume 42
Issue Number 5
Page from 277
Page to 287
ISSN 0022-2895
Date Accessioned 2010-10-22
Language en_AU
Research Centre Centre for Musculoskeletal Research; Griffith Health Institute
Faculty Griffith Health Faculty
Subject Biomechanics; Motor Control
URI http://hdl.handle.net/10072/34944
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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