Document Detail

Characteristics of somatosensory feedback in postural control during standing.
MedLine Citation:
PMID:  11474967     Owner:  NLM     Status:  MEDLINE    
In the present study, the function of the somatosensory feedback system in postural control was investigated. For the sake of simplicity, the present study considered only balancing in the anteroposterior direction using the ankle strategy, in which the ankle moment is mainly used to maintain balance. To suppress the vestibular and visual feedback paths, a subject stood on a force-measuring platform with a fixed back support. Because the subject's body was immovable under these conditions, the subject controlled a computer model that simulated the subject's load at the ankles. Information about the sway angle of the model was fed through the somatosensory feedback path. Frequency response functions of the ankle moment in response to the sway angle were calculated. The experimental results suggest that the human somatosensory feedback system has derivative characteristics and, consequently, can maintain an upright posture by itself. The results were compared with those of previous studies on vestibular and visual feedback systems. The comparison reveals that subject-to-subject variance in the somatosensory system is significantly smaller than that in the other systems. This may indicate that the somatosensory feedback is the most automatic of the systems and plays a dominant role when a subject maintains an upright posture using the ankle strategy.
Y Fukuoka; T Nagata; A Ishida; H Minamitani
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society     Volume:  9     ISSN:  1534-4320     ISO Abbreviation:  IEEE Trans Neural Syst Rehabil Eng     Publication Date:  2001 Jun 
Date Detail:
Created Date:  2001-07-27     Completed Date:  2001-12-04     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  101097023     Medline TA:  IEEE Trans Neural Syst Rehabil Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  145-53     Citation Subset:  IM    
Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Japan.
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MeSH Terms
Ankle / physiology
Computer Simulation
Evoked Potentials, Somatosensory / physiology*
Middle Aged
Postural Balance / physiology*

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

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