Document Detail


Neural representation of feature synergy.
MedLine Citation:
PMID:  21111826     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Interactive non-linear cooperation of different feature dimensions, feature synergy, has been studied in psychophysics, but the neural mechanism is unknown. The present study investigated the neural representation of feature synergy of two second-order visual features by combining electroencephalography (EEG) with the signal detection theory (SDT). Two kinds of a 27-by-27 array of Gabor patches were presented in a random order; a reference stimulus which has no segregated region, and a target stimulus whose inner region differed in spatial frequency, orientation, or both from the surround. Subjects performed a Yes-No discrimination of whether the inner region was different from the surround, while EEG signals were recorded from 62 locations. When the SDT measure showed feature synergy, EEG activity showed a long-lasting enhancement starting at 130ms around the inferior temporal region. In contrast, no EEG modulation was observed when feature synergy was not present. Thus, our combined approach demonstrates that non-linear cooperation between different features is represented by neural activity starting at 130ms post-stimulus in the ventral visual stream.
Authors:
Tetsuo Kida; Emi Tanaka; Yasuyuki Takeshima; Ryusuke Kakigi
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2010-11-25
Journal Detail:
Title:  NeuroImage     Volume:  -     ISSN:  1095-9572     ISO Abbreviation:  -     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-12-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9215515     Medline TA:  Neuroimage     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2010 Elsevier Inc. All rights reserved.
Affiliation:
Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Japan; Japan Society for the Promotion of Science, Tokyo, Japan; Department of Neurobiology and Behavior, Graduate School of Biomedical Sciences Nagasaki University, Nagasaki, Japan.
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