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首页> 外文期刊>The European Journal of Neuroscience >State dependency of inhibitory control performance: an electrical neuroimaging study
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State dependency of inhibitory control performance: an electrical neuroimaging study

机译：抑制控制性能的状态依赖性：电神经成像研究

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Behavioral and brain responses to stimuli not only depend on their physical features but also on the individuals' neurocognitive states before stimuli onsets. While the influence of pre-stimulus fluctuations in brain activity on low-level perceptive processes is well established, the state dependency of high-order executive processes remains unclear. Using a classical inhibitory control Go/NoGo task, we examined whether and how fluctuations in the brain activity during the period preceding the stimuli triggering inhibition influenced inhibitory control performance. Seventeen participants completed the Go/NoGo task while 64-channel electroencephalogram was recorded. We compared the event-related potentials preceding the onset of the NoGo stimuli associated with inhibition failures false alarms (FA) vs. successful inhibition correct rejections (CR) with data-driven statistical analyses of global measures of the topography and strength of the scalp electric field. Distributed electrical source estimations were used to localize the origin of the event-related potentials modulations. We observed differences in the global field power of the event-related potentials (FA > CR) without concomitant topographic modulations over the 40 ms period immediately preceding NoGo stimuli. This result indicates that the same brain networks were engaged in the two conditions, but more strongly before FA than CR. Source estimations revealed that this effect followed from a higher activity before FA than CR within bilateral inferior frontal gyri and the right inferior parietal lobule. These findings suggest that uncontrolled quantitative variations in pre-stimulus activity within attentional and control brain networks influence inhibition performance. The present data thereby demonstrate the state dependency of cognitive processes of up to high-order executive levels.
机译：行为和大脑对刺激的反应不仅取决于其身体特征，还取决于个体在刺激发作前的神经认知状态。虽然大脑活动的刺激前波动对低水平知觉过程的影响已得到充分确立，但高阶执行过程的状态依赖性仍然不清楚。使用经典的抑制控制Go / NoGo任务，我们检查了在刺激触发抑制之前的一段时间内，大脑活动的波动是否以及如何影响到抑制控制性能。 17位参与者完成了Go / NoGo任务，同时记录了64通道脑电图。我们将NoGo刺激发作前与抑制失败，虚假警报（FA）与成功抑制正确拒绝（CR）相关的事件相关电位与对形貌和头皮电强度的整体测量进行数据驱动的统计分析进行了比较领域。分布式电源估计用于定位与事件相关的电位调制的起源。我们观察到事件相关电位（FA> CR）的全局场功率的差异，在紧接NoGo刺激之前的40毫秒时间内没有伴随的地形调制。该结果表明，在两种情况下都使用相同的大脑网络，但在FA之前比CR更强烈。资料来源估计，这种作用是由于双侧下额回和右下顶小叶在FA前比CR高活性。这些发现表明，注意力和控制性大脑网络内刺激前活动的不受控制的定量变化会影响抑制性能。因此，本数据证明了认知过程的状态依存性高达高阶执行水平。

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