Document Detail


Complete sparing of high-contrast color input to motion perception in cortical color blindness.
MedLine Citation:
PMID:  10195150     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
It is widely held that color and motion are processed by separate parallel pathways in the visual system, but this view is difficult to reconcile with the fact that motion can be detected in equiluminant stimuli that are defined by color alone. To examine the relationship between color and motion, we tested three patients who had lost their color vision following cortical damage (central achromatopsia). Despite their profound loss in the subjective experience of color and their inability to detect the motion of faint colors, all three subjects showed surprisingly strong responses to high-contrast, moving color stimuli--equal in all respects to the performance of subjects with normal color vision. The pathway from opponent-color detectors in the retina to the motion analysis areas must therefore be independent of the damaged color centers in the occipitotemporal area. It is probably also independent of the motion analysis area MT/V5, because the contribution of color to motion detection in these patients is much stronger than the color response of monkey area MT.
Authors:
P Cavanagh; M A Hénaff; F Michel; T Landis; T Troscianko; J Intriligator
Publication Detail:
Type:  Case Reports; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Nature neuroscience     Volume:  1     ISSN:  1097-6256     ISO Abbreviation:  Nat. Neurosci.     Publication Date:  1998 Jul 
Date Detail:
Created Date:  1999-04-20     Completed Date:  1999-04-20     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  9809671     Medline TA:  Nat Neurosci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  242-7     Citation Subset:  IM    
Affiliation:
Department of Psychology, Harvard University, Cambridge, Massachusetts 02138, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Color Perception / physiology*
Color Vision Defects / physiopathology*
Contrast Sensitivity / physiology
Humans
Male
Motion Perception / physiology*
Photic Stimulation / methods
Reference Values
Grant Support
ID/Acronym/Agency:
EY09258/EY/NEI NIH HHS

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


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