Entrainment of neuronal oscillations as a mechanism of attentional selection
Entrainment of neuronal oscillations as a mechanism of attentional selection
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DOI：
10.1126/science.1154735
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发表时间：
2008-04-04
期刊：
影响因子：
56.9
通讯作者：
Schroeder, Charles E.
中科院分区：
文献类型：
--
作者：
Lakatos, Peter;Karmos, George;Schroeder, Charles E.
虽然伽马波段神经元振荡显然与视觉注意力密不可分，但低频振荡的作用仍在争论中。越来越多的证据表明，这些振荡的一个关键功能特性是局部神经元集合兴奋性的节律性变化。在这里，我们表明，当关注的刺激是在一个有节奏的流，在初级视觉皮层的δ带振荡夹带流的节奏，导致增加的反应增益任务相关的事件和减少的反应时间。由于分层交叉频率耦合，三角形相位也决定了瞬时功率在更高的频率活动.低频振荡的这些工具性功能支持了一个整合了许多早期发现的概念框架.
Whereas gamma- band neuronal oscillations clearly appear integral to visual attention, the role of lower- frequency oscillations is still being debated. Mounting evidence indicates that a key functional property of these oscillations is the rhythmic shifting of excitability in local neuronal ensembles. Here, we show that when attended stimuli are in a rhythmic stream, delta- band oscillations in the primary visual cortex entrain to the rhythm of the stream, resulting in increased response gain for task- relevant events and decreased reaction times. Because of hierarchical cross- frequency coupling, delta phase also determines momentary power in higher- frequency activity. These instrumental functions of low- frequency oscillations support a conceptual framework that integrates numerous earlier findings.