Document Detail


Reduced plantar sensitivity alters postural responses to lateral perturbations of balance.
MedLine Citation:
PMID:  15029466     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
There is considerable evidence that lower-limb somatosensation contributes to the control of upright balance. In this study, we investigated the specific role of foot sole cutaneous afferents in the generation of balance corrections following lateral accelerations of the support surface. Participants were subjected to balance perturbations before and after targeted anesthesia of the cutaneous soles induced by intradermal injections of local anesthetic. Subject responses were quantified in terms of net joint torques at the ankles, hips and trunk. Contrary to the conclusions drawn in earlier studies, response torque impulses at the ankles and hips were clearly scaled with the perturbation impulse under both control and anesthetized conditions. Reduced plantar sensitivity produced a relative shift in compensatory torque production from the ankles and trunk to the hips. These findings demonstrate that plantar cutaneous afferents play an important role in the shaping of dynamic postural responses. Furthermore, the results suggest that loss of plantar sensation may be an important contributor to the dynamic balance deficits and increased risk of falls associated with peripheral neuropathies.
Authors:
Peter F Meyer; Lars I E Oddsson; Carlo J De Luca
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2004-03-17
Journal Detail:
Title:  Experimental brain research     Volume:  157     ISSN:  0014-4819     ISO Abbreviation:  Exp Brain Res     Publication Date:  2004 Aug 
Date Detail:
Created Date:  2004-08-04     Completed Date:  2004-11-06     Revised Date:  2013-12-13    
Medline Journal Info:
Nlm Unique ID:  0043312     Medline TA:  Exp Brain Res     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  526-36     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Adult
Analysis of Variance
Biomechanical Phenomena / methods
Foot / physiology*
Functional Laterality / physiology*
Heel / physiology
Humans
Male
Middle Aged
Postural Balance / physiology*
Statistics, Nonparametric

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


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