Document Detail


Color vision but not visual attention is altered in migraine.
MedLine Citation:
PMID:  16643556     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: To examine visual search performance in migraine and headache-free control groups and to determine whether reports of selective color vision deficits in migraine occur preattentively. BACKGROUND: Visual search is a classic technique to measure certain components of visual attention. The technique can be manipulated to measure both preattentive (automatic) and attentive processes. Here, visual search for colored targets was employed to extend earlier reports that the detection or discrimination of colors selective for the short-wavelength sensitive cone photoreceptors in the retina (S or "blue" cones) is impaired in migraine. METHOD: Visual search performance for small and large color differences was measured in 34 migraine and 34 control participants. Small and large color differences were included to assess attentive and preattentive processing, respectively. In separate conditions, colored stimuli were chosen that would be detected selectively by either the S-, or by the long- (L or "red") and middle (M or "green")-wavelength sensitive cone photoreceptors. RESULTS: The results showed no preattentive differences between the migraine and control groups. For active, or attentive, search, differences between the migraine and control groups occurred for colors detected by the S-cones only, there were no differences for colors detected by the L- and M-cones. The migraine group responded significantly more slowly than the control group for the S-cone colors. CONCLUSIONS: The pattern of results indicates that there are no overall differences in search performance between migraine and control groups. The differences found for the S-cone colors are attributed to impaired discrimination of these colors in migraine and not to differences in attention.
Authors:
Alex J Shepherd
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Headache     Volume:  46     ISSN:  0017-8748     ISO Abbreviation:  Headache     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-04-28     Completed Date:  2006-09-01     Revised Date:  2009-02-02    
Medline Journal Info:
Nlm Unique ID:  2985091R     Medline TA:  Headache     Country:  United States    
Other Details:
Languages:  eng     Pagination:  611-21     Citation Subset:  IM    
Affiliation:
School of Psychology, Birbeck College, University of London, Malet St, London, WC1E 7HX, UK.
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MeSH Terms
Descriptor/Qualifier:
Attention
Color Perception Tests
Color Vision Defects / etiology,  physiopathology
Migraine Disorders / complications,  physiopathology*
Retinal Cone Photoreceptor Cells / physiopathology
Vision Disorders / etiology,  physiopathology*
Vision, Ocular / physiology*
Visual Fields / physiology

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


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