Gamma flicker triggers attentional selection without awareness

被引：54

作者：

Bauer, Frank ^{[2
]}

Cheadle, Samuel W. ^{[1
]}

Parton, Andrew ^{[3
]}

Mueller, Hermann J. ^{[1
,2
]}

Usher, Marius ^{[1
,4
]}

机构：

[1] Univ London, Sch Psychol, London WC1E 7HX, England

[2] Univ Munich, Dept Psychol, D-80802 Munich, Germany

[3] Brunel Univ, Ctr Cognit & Neuroimaging, Uxbridge UB8 3PH, Middx, England

[4] Tel Aviv Univ, Dept Psychol, IL-69978 Ramat Aviv, Israel

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2009年 / 106卷 / 05期

关键词：

visual attention; neural synchrony; gamma; psychophysics; subliminal; VISUAL-CORTEX; NEURONAL SYNCHRONIZATION; NEURAL MECHANISMS; OSCILLATIONS; INFORMATION; MODULATION; RESPONSES; MACAQUE; AREA; V4;

D O I：

10.1073/pnas.0810496106

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：1666 / 1671

页数：6

共 35 条

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