Document Detail

A comparison of tactile spatial sensitivity on the palm and fingerpad.
MedLine Citation:
PMID:  11281108     Owner:  NLM     Status:  MEDLINE    
Studies of tactile spatial pattern perception have, for the most part, been carried out using the fingerpad. On the basis of these studies, models have been developed linking spatial pattern identification and resolution with underlying neural structures. It has been suggested that with appropriate scaling, these models would apply to the processing of spatial patterns presented to other sites on the body. Spatial sensitivity was examined on another site on the body, the palm, using two measures, letter identification and grating orientation. The results from these measures were compared with results from similar studies conducted on the fingerpad and with estimates of the density of innervation of the fingerpad and palm. To produce levels of performance similar to those on the fingerpad required letters on the palm 50 mm in height, seven to nine times larger than those used on the fingerpad. Gratings had to be six to more than seven times larger on the palm to produce the same levels of performance achieved on the fingerpad. For the two types of receptor systems sensitive to spatial information, the ratio of density of innervation between the fingerpad and the palm is estimated to be 5.7:1 and 8.8:1. Performance of spatial tasks on the palm can be predicted quantitatively from fingerpad data with a moderate degree of accuracy. Qualitative comparisons between the palm and fingerpad data indicate that spatial patterns are processed similarly at the two sites.
J C Craig; K B Lyle
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Perception & psychophysics     Volume:  63     ISSN:  0031-5117     ISO Abbreviation:  Percept Psychophys     Publication Date:  2001 Feb 
Date Detail:
Created Date:  2001-04-02     Completed Date:  2001-05-03     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0200445     Medline TA:  Percept Psychophys     Country:  United States    
Other Details:
Languages:  eng     Pagination:  337-47     Citation Subset:  IM    
Department of Psychology, 1101 E. 10th St., Indiana University, Bloomington, IN 47405-7007, USA.
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MeSH Terms
Fingers / innervation*
Hand / innervation*
Kinesthesis / physiology
Mechanoreceptors / physiology
Sensory Thresholds / physiology
Touch / physiology*
Grant Support
Comment In:
Percept Psychophys. 2002 Apr;64(3):504-6   [PMID:  12049289 ]

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

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