Document Detail

Chromaticity and achromaticity. Evidence for a functional differentiation in visual field defects.
MedLine Citation:
PMID:  3651799     Owner:  NLM     Status:  MEDLINE    
In the visual field defects of 10 patients who had suffered lesions in the postgeniculate part of the primary visual projection, red-green discrimination and achromatic target detection was tested. In addition, 8 of these patients were tested for detection of red and green targets. Targets were presented on a low photopic achromatic background, so that the red and green targets differed from the background both in intensity and in wavelength, whereas the achromatic target differed in intensity only. Six patients showed evidence of discriminating between red and green targets, 5 patients could also detect the colour targets, but none could detect the achromatic one that was presented at the same retinal position. These results imply that wavelength and intensity information are treated differentially, and suggest that these patients possess residual colour-opponent channels that subserve the defective part of the visual field.
P Stoerig
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Brain : a journal of neurology     Volume:  110 ( Pt 4)     ISSN:  0006-8950     ISO Abbreviation:  Brain     Publication Date:  1987 Aug 
Date Detail:
Created Date:  1987-11-02     Completed Date:  1987-11-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372537     Medline TA:  Brain     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  869-86     Citation Subset:  AIM; IM    
Institute of Medical Psychology, Munich University, FRG.
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MeSH Terms
Color Perception / physiology*
Vision Disorders / physiopathology*
Visual Fields*

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

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