Document Detail

Separate processing of "color" and "brightness" in goldfish.
MedLine Citation:
PMID:  1843758     Owner:  NLM     Status:  MEDLINE    
Spectral sensitivity was measured under different adaptation levels using a behavioral training technique in which the fish had to discriminate between a dark test field and a test field illuminated with monochromatic light. Depending on which of the two test fields was used as training test field, two functions were obtained which differ (1) in absolute sensitivity and (2) in shape. When trained on the dark test field, the fish seems to discriminate on the basis of a "color" cue, but it uses a "brightness" cue when trained on the illuminated test field. This was concluded from measurements of wavelength discrimination. Under low levels of the adaptation light (1.5 and 0.2 lx instead of 20 lx), the L-cone type contributes to perception of "brightness" but not to color vision. This difference in the adaptation behavior in the long-wavelength range was used to identify the ganglion cells which may represent channels for "brightness" and "color" in the retina. Action spectra were recorded extracellularly at different levels of dark- and light-adaptation.
C Neumeyer; J J Wietsma; H Spekreijse
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Vision research     Volume:  31     ISSN:  0042-6989     ISO Abbreviation:  Vision Res.     Publication Date:  1991  
Date Detail:
Created Date:  1993-03-12     Completed Date:  1993-03-12     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0417402     Medline TA:  Vision Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  537-49     Citation Subset:  IM    
Institut für Zoologie, Joh. Gutenberg-Universität, Mainz, F.R.G.
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MeSH Terms
Color Perception / physiology*
Dark Adaptation / physiology
Goldfish / physiology*
Photoreceptor Cells / physiology
Retinal Ganglion Cells / physiology
Sensory Thresholds
Visual Pathways / physiology*

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

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