Document Detail

The relation of hand preference to hand performance in left-handers: importance of the left brain.
MedLine Citation:
PMID:  1341670     Owner:  NLM     Status:  MEDLINE    
The associations among hand preference, hand skill (peg moving time, PMT) and hand performance (dot filling/20 s) were analyzed in left-handed subjects. In the total sample, the degree of left-hand preference linearly decreased from -100 to zero (Geschwind scores, GSs) as the number of dots placed by the right hand increased (direct correlation); the left hand did not show any significant relation to GSs. The right-hand PMT linearly decreased as the GSs decreased (negative linear correlation); the left hand skill did not exhibit any significant correlation with GSs. There was a negative linear correlation between right-hand PMT and dot-filling with right hand; the left-hand PMT was not related to dot-filling with left hand. In males, the right-hand PMT showed a negative linear correlation with GSs; no significant correlation between PMT and GSs was found for the left hand. There was a negative linear correlation between right minus left (R - L) PMT and GSs. Dot-filling with right hand was found to be positively linearly correlated with GSs (no correlation for the left hand). The L - R dot-filling showed a negative linear correlation with GSs. PMT for the right hand exhibited a significant negative linear relation to dot-filling only with right hand. Sex and familial sinistrality caused minor changes in these relationships. It was concluded that the left brain would constitute the main factor determining the degree of left-handedness.
U Tan
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The International journal of neuroscience     Volume:  65     ISSN:  0020-7454     ISO Abbreviation:  Int. J. Neurosci.     Publication Date:    1992 Jul-Aug
Date Detail:
Created Date:  1994-01-27     Completed Date:  1994-01-27     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0270707     Medline TA:  Int J Neurosci     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1-10     Citation Subset:  IM    
Atatürk University, Medical Faculty, Department of Physiology, Erzurum, Turkey.
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MeSH Terms
Dominance, Cerebral*
Functional Laterality*
Motor Skills
Neuropsychological Tests
Psychomotor Performance*
Reaction Time*

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