Document Detail

Sensitivity of macaque retinal ganglion cells and human observers to combined luminance and chromatic temporal modulation.
MedLine Citation:
PMID:  1527650     Owner:  NLM     Status:  MEDLINE    
We measured the sensitivity of macaque retinal ganglion cells and human subjects to luminance and chromatic modulation and to two combined conditions as a function of temporal frequency. For both physiological and psychophysical data, we compared the sensitivities to luminance and chromatic modulation with the sensitivities in the combined conditions, using an additivity measure. When the physiological and the psychophysical data were taken together, the results suggested that under the combined conditions psychophysical sensitivity was the envelope of independent achromatic and chromatic mechanisms with physiological substrates in the magnocellular and the parvocellular pathways, respectively. In the combined conditions tested, sensitivity appeared to be set by a chromatic channel below 3 Hz and an achromatic channel above this frequency. This hypothesis was supported by a comparison of detection sensitivities with discrimination thresholds for the presence of chromatic alternation.
J Kremers; B B Lee; P K Kaiser
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of the Optical Society of America. A, Optics and image science     Volume:  9     ISSN:  0740-3232     ISO Abbreviation:  J Opt Soc Am A     Publication Date:  1992 Sep 
Date Detail:
Created Date:  1992-10-16     Completed Date:  1992-10-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8402086     Medline TA:  J Opt Soc Am A     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1477-85     Citation Subset:  IM    
Department of Neurobiology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.
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MeSH Terms
Color Perception / physiology*
Macaca fascicularis
Retinal Ganglion Cells / physiology*
Sensory Thresholds

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