Document Detail

Differences in rapid initiation and termination of voluntary postural sway associated with ageing and falls-risk.
MedLine Citation:
PMID:  20739269     Owner:  NLM     Status:  MEDLINE    
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.
Murray G Tucker; Justin J Kavanagh; Steven Morrison; Rod S Barrett
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of motor behavior     Volume:  42     ISSN:  1940-1027     ISO Abbreviation:  J Mot Behav     Publication Date:    2010 Sep-Oct
Date Detail:
Created Date:  2010-09-09     Completed Date:  2011-01-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0236512     Medline TA:  J Mot Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  277-87     Citation Subset:  IM    
School of Physiotherapy and Exercise Science, Griffith University, Queensland, Gold Coast, Australia.
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MeSH Terms
Accidental Falls
Aged, 80 and over
Aging / physiology*
Postural Balance / physiology*
Reaction Time / physiology*
Risk Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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