Document Detail

Psychophysical signatures associated with magnocellular and parvocellular pathway contrast gain: comment.
MedLine Citation:
PMID:  9729855     Owner:  NLM     Status:  MEDLINE    
The recent paper by Pokorny and Smith [J. Opt. Soc. Am. A 14, 2477 (1977)] describes psychophysical data that correlate well with the physiology of the magnocellular and the parvocellular pathways. One of the critical differences between cells in these two pathways is the contrast of the visual input for which the responses of these cells start to saturate. In the analysis of their data, Pokorny and Smith have to assume values for the saturation contrast of the putative pathways that mediate detection. Here I reanalyze their model and show that this assumption is unnecessary, since values of the saturation contrast follow directly from their data.
H P Snippe
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics, image science, and vision     Volume:  15     ISSN:  1084-7529     ISO Abbreviation:  J Opt Soc Am A Opt Image Sci Vis     Publication Date:  1998 Sep 
Date Detail:
Created Date:  1998-10-02     Completed Date:  1998-10-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9800943     Medline TA:  J Opt Soc Am A Opt Image Sci Vis     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2440-2     Citation Subset:  IM    
Department of Neurobiophysics, University of Groningen, The Netherlands.
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MeSH Terms
Models, Biological*
Neurons, Afferent / physiology
Primates / physiology
Psychophysics / methods*
Retina / physiology*
Visual Pathways / physiology*

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