感知
N2pc
机制(生物学)
认知心理学
心理学
对象(语法)
选择性注意
返回抑制
意识的神经相关物
神经科学
认知
计算机科学
视觉感受
视觉注意
人工智能
哲学
认识论
作者
Risa Sawaki,Joy J. Geng,Steven J. Luck
标识
DOI:10.1523/jneurosci.1864-12.2012
摘要
Much is known about the mechanisms by which attention is focused to facilitate perception, but little is known about what happens to attention after perception of the attended object is complete. One possibility is that the focus of attention passively fades. A second possibility is that attention is actively terminated after the completion of perception so that the brain can be prepared for the next target. The present study investigated this issue with event-related potentials in humans, focusing on the N2pc component (a neural measure of attentional deployment) and the Pd component (a neural measure of attentional suppression). We found that active suppression occurred both to prevent the allocation of attention to known distractors and to terminate attention after the perception of an attended object was complete. In addition, the neural measure of active suppression was correlated with a behavioral measure of trial-to-trial variations in the allocation of attention. Active suppression therefore appears to be a general-purpose mechanism that both prevents and terminates the allocation of attention.
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