Document Detail

Gamma flicker triggers attentional selection without awareness.
MedLine Citation:
PMID:  19124766     Owner:  NLM     Status:  MEDLINE    
Gamma band modulations in neural activity have been proposed to mediate attentional processes. To support a causal link between gamma activity and attentional selection, we attempt to evoke gamma oscillations by a 50-Hz subliminal flicker. We find that a subliminal 50-Hz flicker at a target location, before target presentation, speeds up and enhances target detection and discrimination. This effect is specific to the middle of the gamma range because it is not evident at <35-Hz flicker. It requires 300 ms to build up, dissipates within 250 ms of flicker offset, and shows a tendency to invert after 500 ms. The results are discussed in relation to a role for gamma band neural synchrony in the allocation of visual attention.
Frank Bauer; Samuel W Cheadle; Andrew Parton; Hermann J Müller; Marius Usher
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-01-05
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  106     ISSN:  1091-6490     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-02-04     Completed Date:  2009-02-27     Revised Date:  2013-06-02    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1666-71     Citation Subset:  IM    
Department of Psychology, Leopoldstrasse 13, Ludwig Maximilian University, 80802 Munich, Germany.
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MeSH Terms
Flicker Fusion*
Vision, Ocular
Comment In:
Proc Natl Acad Sci U S A. 2009 Feb 24;106(8):2479-80   [PMID:  19240219 ]

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