Document Detail

Balance control and adaptation during vibratory perturbations in middle-aged and elderly humans.
MedLine Citation:
PMID:  14985989     Owner:  NLM     Status:  MEDLINE    
The objective was to investigate if healthy elderly people respond and adapt differently to postural disturbances compared to middle-aged people. Thirty middle-aged (mean age 37.8 years, range 24-56 years) and forty healthy elderly subjects (mean age 74.6 years, range 66-88 years) were tested with posturography. Body sway was evoked by applying pseudorandom vibratory stimulation to the belly of the gastrocnemius muscles of both legs simultaneously. The tests were performed both with eyes open and eyes closed. The anteroposterior body sway was measured with a force platform and analyzed with a method that considers the adaptive changes of posture and stimulation responses. The results showed that middle-aged people generally used a different postural control strategy as compared to the elderly. The elderly responded more rapidly to vibratory perturbation, used more high-frequency (>0.1 Hz) motions and the motion dynamics had a higher degree of complexity. Moreover, the elderly had diminished ability to use visual information to improve balance control. Altogether, despite having an effective postural control adaptation similar to that of middle-aged people, the elderly had more difficulty in withstanding balance perturbations. These findings suggest that the balance control deterioration associated with aging cannot be fully compensated for by postural control adaptation.
P-A Fransson; E K Kristinsdottir; A Hafström; M Magnusson; R Johansson
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Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't     Date:  2004-02-17
Journal Detail:
Title:  European journal of applied physiology     Volume:  91     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2004 May 
Date Detail:
Created Date:  2004-04-16     Completed Date:  2004-11-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  595-603     Citation Subset:  IM    
Department of Otorhinolaryngology, University Hospital of Lund, 221 85, Lund, Sweden.
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MeSH Terms
Adaptation, Physiological / physiology
Age Factors
Aged, 80 and over
Aging / physiology*
Feedback / physiology
Middle Aged
Movement / physiology*
Muscle Contraction / physiology
Muscle, Skeletal / physiology*
Physical Stimulation / methods*
Postural Balance / physiology*
Posture / physiology*
Reflex / physiology*

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

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