Document Detail

Perceptibility of large and sequential changes in somatosensory information during leaning forward and backward when standing.
MedLine Citation:
PMID:  12776839     Owner:  NLM     Status:  MEDLINE    
11 healthy young men served as subjects in two experiments on perceptibility of (1) large changes in foot pressure and muscle activity induced by body leaning and (2) sequential changes in pressure at the first toe and the head of the first metatarsalis when leaning forward. The effects of reduced sensitivity on that perceptibility were also studied by repeating the experiments while cooling localized plantar areas of the sole (the head of the first metatarsalis, the first toe, and the heel). Under the normal (noncooled) condition, all subjects accurately perceived maximum pressure at the head of the first metatarsalis, but most subjects misperceived the second large increase in pressure at the first toe and in muscle activity as the first large increase. Under the cooling condition, localized cooling did not affect the perceptibility of maximum pressure at the head of the first metatarsalis or the activity in the tibialis anterior, but the perceptibility of pressure at the first toe and activity of the abductor hallucis were reduced. There were individual differences in perceptibility of activity of the rectus femoris when the heel was cooled. Perceptibility of sequential changes in the pressure was affected differently by the localized cooling of each region. Given these findings, we discussed the role and interrelatedness of pressure sensation in perceiving large and sequential changes in somatosensory information while standing and leaning forward and backward.
Hitoshi Asai; Katsuo Fujiwara
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perceptual and motor skills     Volume:  96     ISSN:  0031-5125     ISO Abbreviation:  Percept Mot Skills     Publication Date:  2003 Apr 
Date Detail:
Created Date:  2003-06-02     Completed Date:  2003-09-30     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0401131     Medline TA:  Percept Mot Skills     Country:  United States    
Other Details:
Languages:  eng     Pagination:  549-77     Citation Subset:  IM    
Department of Physical Therapy, School of Health Sciences, Faculty of Medicine, Kanazawa University, Japan.
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MeSH Terms
Foot / physiology
Muscle, Skeletal / physiology
Proprioception / physiology
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