Document Detail


Distinct Attention Networks for Feature Enhancement and Suppression in Vision.
MedLine Citation:
PMID:  22923337     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Attention biases sensory processing toward neurons containing information about behaviorally relevant events. These attentional biases apparently reflect the combined influence of feature enhancement and suppression. We examined the separate influence of enhancement and suppression in visual processing by determining whether responses to an unattended flicker were modulated when the flicker features matched target features at the attended location, competed with those features, or were neutral. We found that suppression primarily modulated parietal networks with a preferred frequency in the lower alpha band (f(2) = 8 Hz), and enhancement primarily influenced parietal networks with a preferred frequency in the upper alpha band (f(2) = 12 Hz). These responses were coupled with perception, with large responses to the unattended flicker leading to subsequently detected targets when the target features matched the flicker features (i.e., during enhancement). Our results suggest that enhancement and suppression are two distinct processes that work together to shape visual perception.
Authors:
David A Bridwell; Ramesh Srinivasan
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-8-23
Journal Detail:
Title:  Psychological science     Volume:  -     ISSN:  1467-9280     ISO Abbreviation:  Psychol Sci     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-8-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9007542     Medline TA:  Psychol Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1Department of Cognitive Sciences, University of California, Irvine.
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