Document Detail

Feature-selective attention enhances color signals in early visual areas of the human brain.
MedLine Citation:
PMID:  16956975     Owner:  NLM     Status:  MEDLINE    
We used an electrophysiological measure of selective stimulus processing (the steady-state visual evoked potential, SSVEP) to investigate feature-specific attention to color cues. Subjects viewed a display consisting of spatially intermingled red and blue dots that continually shifted their positions at random. The red and blue dots flickered at different frequencies and thereby elicited distinguishable SSVEP signals in the visual cortex. Paying attention selectively to either the red or blue dot population produced an enhanced amplitude of its frequency-tagged SSVEP, which was localized by source modeling to early levels of the visual cortex. A control experiment showed that this selection was based on color rather than flicker frequency cues. This signal amplification of attended color items provides an empirical basis for the rapid identification of feature conjunctions during visual search, as proposed by "guided search" models.
M M Müller; S Andersen; N J Trujillo; P Valdés-Sosa; P Malinowski; S A Hillyard
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2006-09-06
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  103     ISSN:  0027-8424     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2006 Sep 
Date Detail:
Created Date:  2006-09-20     Completed Date:  2006-12-14     Revised Date:  2013-06-07    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  14250-4     Citation Subset:  IM    
Institut für Psychologie I, Universität Leipzig, Seeburgstrasse 14-20, 04103 Leipzig, Germany.
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MeSH Terms
Attention / physiology*
Behavior / physiology
Brain Mapping
Color Perception / physiology*
Evoked Potentials, Visual / physiology
Form Perception / physiology*
Photic Stimulation
Random Allocation
Grant Support
EY016984-32/EY/NEI NIH HHS

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

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