自上而下注意力控制的神经机制。

The neural mechanisms of top-down attentional control.

作者信息

Hopfinger J B, Buonocore M H, Mangun G R

机构信息

Center for Neuroscience and Department of Psychology, One Shields Ave., University of California, Davis, California 95616, USA.

出版信息

Nat Neurosci. 2000 Mar;3(3):284-91. doi: 10.1038/72999.

DOI:10.1038/72999

PMID:10700262

Abstract

Selective visual attention involves dynamic interplay between attentional control systems and sensory brain structures. We used event-related functional magnetic resonance imaging (fMRI) during a cued spatial-attention task to dissociate brain activity related to attentional control from that related to selective processing of target stimuli. Distinct networks were engaged by attention-directing cues versus subsequent targets. Superior frontal, inferior parietal and superior temporal cortex were selectively activated by cues, indicating that these structures are part of a network for voluntary attentional control. This control biased activity in multiple visual cortical areas, resulting in selective sensory processing of relevant visual targets.

摘要

选择性视觉注意涉及注意力控制系统与感觉脑结构之间的动态相互作用。我们在一个线索化空间注意任务中使用事件相关功能磁共振成像（fMRI），以区分与注意力控制相关的脑活动和与目标刺激的选择性处理相关的脑活动。引导注意力的线索和随后的目标激活了不同的网络。额上回、顶下小叶和颞上回皮质被线索选择性激活，表明这些结构是自主注意力控制网络的一部分。这种控制使多个视觉皮质区域的活动产生偏向，从而导致对相关视觉目标的选择性感觉处理。