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http://bura.brunel.ac.uk/handle/2438/8777
Title: | Gamma flicker triggers attentional selection without awareness |
Authors: | Bauer, F Cheadle, SW Parton, A Mueller, HJ Usher, M |
Keywords: | Visual attention;Neural synchrony;Gamma;Psychophysics;Subliminal |
Issue Date: | 2009 |
Publisher: | National Academy of Sciences |
Citation: | Proceedings of the National Academy of Sciences of the United States of America, 106(5), 1666 - 1671, 2009 |
Abstract: | 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. |
Description: | This is the author's accepted manuscript (under the title '50 Hz flicker triggers attentional selection without awareness'). The final published article is available from the link below, copyright @ The National Academy of Sciences. |
URI: | http://www.pnas.org/content/106/5/1666 http://bura.brunel.ac.uk/handle/2438/8777 |
DOI: | http://dx.doi.org/10.1073/pnas.0810496106 |
ISSN: | 0027-8424 |
Appears in Collections: | Psychology Dept of Life Sciences Research Papers |
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