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Neural Mechanisms of Sustained Attention Are Rhythmic

机译：持续关注的神经机制是有节奏的

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Classic models of attention suggest that sustained neural firing constitutes a neural correlate of sustained attention. However, recent evidence indicates that behavioral performance fluctuates over time, exhibiting temporal dynamics that closely resemble the spectral features of ongoing, oscillatory brain activity. Therefore, it has been proposed that periodic neuronal excitability fluctuations might shape attentional allocation and overt behavior. However, empirical evidence to support this notion is sparse. Here, we address this issue by examining data from large-scale subdural recordings, using two different attention tasks that track perceptual ability at high temporal resolution. Our results reveal that perceptual outcome varies as a function of the theta phase even in states of sustained spatial attention. These effects were robust at the single-subject level, suggesting that rhythmic perceptual sampling is an inherent property of the frontoparietal attention network. Collectively, these findings support the notion that the functional architecture of top-down attention is intrinsically rhythmic.
机译：经典的关注模型表明，持续的神经射击构成了持续关注的神经关系。然而，最近的证据表明行为性能随着时间的推移波动，表现出与正在进行的振荡脑活动的光谱特征密切相关的时间动态。因此，已经提出了周期性神经元兴奋性波动可能塑造注意力分配和公开行为。但是，支持这一概念的经验证据稀疏。在这里，我们通过检查大规模硬膜核记录的数据来解决此问题，使用两个不同的关注任务以高时分辨率跟踪感知能力。我们的研究结果表明，即使在持续的空间关注状态下，感性结果也因θ阶段的函数而异。这些效果在单个受试者水平处具有稳健性，表明节奏感知采样是前期注意网络的固有特性。集体，这些调查结果支持概念，即自上而下关注的功能架构是内在节奏的。

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