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首页> 外文期刊>NeuroImage >Dynamic low frequency EEG phase synchronization patterns during proactive control of task switching
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Dynamic low frequency EEG phase synchronization patterns during proactive control of task switching

机译：任务交换主动控制期间动态低频EEG相位同步模式

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Cognitive flexibility is critical for humans living in complex societies with ever-growing multitasking demands. Yet the low-frequency neural dynamics of distinct task-specific and domain-general mechanisms sub-serving mental flexibility are still ill-defined. Here we estimated phase electroencephalogram synchronization by using inter-trial phase coherence (ITPC) at the source space while twenty six young participants were intermittently cued to switch or repeat their perceptual categorization rule of Gabor gratings varying in color and thickness (switch task). Therefore, the aim of this study was to examine whether a proactive control is associated with connectivity only in the frontoparietal theta network, or also involves distinct neural connectivity within the delta band, as distinct neural signatures while preparing to switch or repeat a task set, respectively. To this end, we focused the analysis on late-latencies (from 500 to 800 msec post-cue onset), since they are known to be associated with top-down cognitive control processes. We confirmed that proactive control during a task switch was associated with frontoparietal theta connectivity. But importantly, we also found a distinct role of delta band oscillatory synchronization in proactive control, engaging more posterior frontotemporal regions as opposed to frontoparietal theta connectivity. Additionally, we built a regression model by using the ITPC results in delta and theta bands as predictors, and the behavioral accuracy in the switch task as the criterion, obtaining significant results for both frequency bands. All these findings support the existence of distinct proactive cognitive control processes related to functionally distinct though highly complementary theta and delta frontoparietal and temporoparietal oscillatory networks at late-latency temporal scales.
机译：认知灵活性对于生活在复杂的社会中的人类来说至关重要，具有不断增长的多任务需求。然而，不同任务特定和域一般机制的低频神经动态仍然是暗示的。在这里，我们通过在源空间中使用试用期相干（ITPC）估计相位脑电图同步，而二十六个年轻参与者被间歇地提示以改变颜色和厚度（开关任务）变化的Gabor光栅的感知分类规则。因此，本研究的目的是检查主动控制是否仅在前迁徙的Theta网络中与连接相关联，或者还涉及Delta频带内的不同神经连接，作为不同的神经签名，同时准备切换或重复任务集，分别。为此，我们将分析对后期（从500到800毫秒后发作）的分析集中在一起，因为他们被称为与自上而下的认知控制过程相关联。我们确认在任务交换机期间主动控制与前迁移连接相关联。但重要的是，我们还发现Delta带振荡同步在主动控制中的不同作用，从事更多后初颞区域​​，而不是前迁移的θ连接。此外，我们通过使用Delta和Theta频带中的ITPC结果作为预测器，以及交换机任务中的行为精度作为标准的行为精度，为两个频带获得了显着的结果。所有这些调查结果都支持存在与在后期延迟时间尺度的高度互补的θ和Δ前迁移型振荡网络相关的不同主动认知控制过程。

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