Alpha-Band Oscillations Enable Spatially and Temporally Resolved Tracking of Covert Spatial Attention.

Alpha-Band Oscillations Enable Spatially and Temporally Resolved Tracking of Covert Spatial Attention.
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DOI:
10.1177/0956797617699167
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发表时间:
2017-07
影响因子:
8.2
通讯作者:
Awh E
Awh E
中科院分区:
心理学1区
文献类型:
--
作者:
Foster JJ;Sutterer DW;Serences JT;Vogel EK;Awh E

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隐蔽空间注意力对于人类将有限的处理资源引导到视觉场景的相关方面的能力至关重要。越来越多的证据表明,α 频段(8-12 Hz)的节律性神经活动追踪隐蔽注意力的空间轨迹,这表明 α 活动是空间注意力不可或缺的一部分。然而,现有的工作尚未对另一个关键预测提供令人信服的测试:阿尔法活动跟踪隐蔽空间定向的时间动态。在当前的研究中,我们检查了中心线索后和视觉搜索期间空间特定的阿尔法活动的时间过程。至关重要的是,这项活动的时间进程跟踪了视觉搜索过程中定向延迟的逐次试验变化。这些发现为节律性大脑活动与隐蔽空间注意力之间的联系提供了重要的新证据,并且它们强调了跟踪这一核心认知过程的空间和时间动态的强大方法。
Covert spatial attention is essential for humans’ ability to direct limited processing resources to the relevant aspects of visual scenes. A growing body of evidence suggests that rhythmic neural activity in the alpha frequency band (8–12 Hz) tracks the spatial locus of covert attention, which suggests that alpha activity is integral to spatial attention. However, extant work has not provided a compelling test of another key prediction: that alpha activity tracks the temporal dynamics of covert spatial orienting. In the current study, we examined the time course of spatially specific alpha activity after central cues and during visual search. Critically, the time course of this activity tracked trial-by-trial variations in orienting latency during visual search. These findings provide important new evidence for the link between rhythmic brain activity and covert spatial attention, and they highlight a powerful approach for tracking the spatial and temporal dynamics of this core cognitive process.
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