Neural entrainment and alpha oscillatory power (8-14 Hz) are mechanisms of selective attention. The extent to which these two mechanisms interact, especially in the context of visuospatial attention, is unclear. Here, we show that spatial attention to a delta-frequency, rhythmic visual stimulus in one hemifield results in phase-amplitude coupling between the delta-phase of an entrained frontal source and alpha power generated by ipsilateral visuocortical regions. The driving of ipsilateral alpha power by frontal delta also correlates with task performance. Our analyses suggest that neural entrainment may serve a previously underappreciated role in coordinating macroscale brain networks and that inhibition of processing by alpha power can be coupled to an attended temporal structure. Finally, we note that the observed coupling bolsters one dominant hypothesis of modern cognitive neuroscience, that macroscale brain networks and distributed neural computation are coordinated by oscillatory synchrony and cross-frequency interactions.

中文翻译：

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α振荡功率与空间参与的输入流的夹带节奏的跨频耦合。

神经夹带和α振荡能量（8-14 Hz）是选择性注意的机制。尚不清楚这两种机制相互作用的程度，尤其是在视觉空间关注的情况下。在这里，我们表明，在一个半场中对三角频率，有节奏的视觉刺激的空间关注会导致夹带额叶源三角相和同侧内视皮层区域产生的α功率之间的相位-幅度耦合。前额三角带驱动同侧α功率也与任务表现相关。我们的分析表明，神经夹带可能在协调宏观脑网络中起着先前未被重视的作用，并且α动力对加工的抑制作用可能与参与的时间结构有关。最后，