Resting-state EEG power predicts conflict-related brain activity in internally guided but not in externally guided decision-making
Resting-state EEG power predicts conflict-related brain activity in internally guided but not in externally guided decision-making
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DOI：
10.1016/j.neuroimage.2012.10.034
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发表时间：
2013-02-01
期刊：
影响因子：
5.7
通讯作者：
Northoff, Georg
中科院分区：
文献类型：
--
作者：
Nakao, Takashi;Bai, Yu;Northoff, Georg
大多数关于决策的实验研究都专门研究了存在单一正确答案的情况（外部指导决策）。沿着这样的外部引导的决策，存在基于外部环境的正确答案对于受试者不可用的决策的实例（内部引导的决策，例如偏好判断）。我们比较了这两种不同类型的决策在冲突监测方面，以及它们与静息态大脑活动的关系。目前的脑电图（EEG）数据表明，冲突相关的N2振幅（即，大冲突和小冲突条件之间的差异）受到外部刺激类型的调节（即，大冲突刺激对或小冲突刺激对），但未发现与静息态脑活动（即静息态EEG功率）相关。与此相反，冲突相关的N2振幅在内部指导决策被发现与休息状态的大脑活动，但没有发现被调制的刺激本身的类型：在何种程度上的外部刺激调制的冲突刺激编码过程中根据个体差异内在的大脑活动。综合考虑这些结果，我们首次展示了外部和内部指导决策之间的静息状态和刺激相关差异。(C)2012 Elsevier Inc. All rights reserved.
Most experimental studies of decision-making have specifically examined situations in which a single correct answer exists (externally guided decision-making). Along with such externally guided decision-making, there are instances of decision-making in which no correct answer based on external circumstances is available for the subject (internally guided decision-making, e.g. preference judgment). We compared these two different types of decision-making in terms of conflict-monitoring and their relation with resting-state brain activity. Current electroencephalography (EEG) data demonstrated that conflict-related N2 amplitudes (i.e., difference between large-conflict and small-conflict conditions) in externally guided decision-making were modulated by the type of external stimulus (i.e., large-conflict stimulus pair or small-conflict stimulus pair) but were not found to be correlated with resting-state brain activity (i.e. resting-state EEG power). In contrast, conflict-related N2 amplitudes in internally guided decision-making were found to be correlated with resting-state brain activity, but were not found to be modulated by the type of stimulus itself: the degree to which the type of external stimulus modulates the conflict during stimulus encoding varies according to individual differences in intrinsic brain activity. Considering those results comprehensively, we demonstrate for the first time resting-state and stimulus-related differences between externally and internally guided decision-making. (C) 2012 Elsevier Inc. All rights reserved.