| Balance control and adaptation during vibratory perturbations in middle-aged and elderly humans. | |
MedLine Citation:
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PMID: 14985989 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
Authors:
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P-A Fransson; E K Kristinsdottir; A Hafström; M Magnusson; R Johansson |
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Publication Detail:
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Type: Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't Date: 2004-02-17 |
Journal Detail:
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Title: European journal of applied physiology Volume: 91 ISSN: 1439-6319 ISO Abbreviation: Eur. J. Appl. Physiol. Publication Date: 2004 May |
Date Detail:
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Created Date: 2004-04-16 Completed Date: 2004-11-30 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: Germany |
Other Details:
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Languages: eng Pagination: 595-603 Citation Subset: IM |
Affiliation:
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Department of Otorhinolaryngology, University Hospital of Lund, 221 85, Lund, Sweden. Per-Anders.Fransson@onh.lu.se |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological
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physiology Adult Age Factors Aged Aged, 80 and over Aging / physiology* Feedback / physiology Female Humans Male Middle Aged Movement / physiology* Muscle Contraction / physiology Muscle, Skeletal / physiology* Physical Stimulation / methods* Postural Balance / physiology* Posture / physiology* Reflex / physiology* Vibration |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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