气候变化领域集成服务门户(CCPortal): Distinct electrophysiological signatures of task-unrelated and dynamic thoughts

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DOI	10.1073/pnas.2011796118
	Distinct electrophysiological signatures of task-unrelated and dynamic thoughts
	Kam J.W.Y.; Irving Z.C.; Mills C.; Patel S.; Gopnik A.; Knight R.T.
发表日期	2021
ISSN	00278424
卷号	118 期号:4
英文摘要	Humans spend much of their lives engaging with their internal train of thoughts. Traditionally, research focused on whether or not these thoughts are related to ongoing tasks, and has identified reliable and distinct behavioral and neural correlates of task-unrelated and task-related thought. A recent theoretical framework highlighted a different aspect of thinking—how it dynamically moves between topics. However, the neural correlates of such thought dynamics are unknown. The current study aimed to determine the electrophysiological signatures of these dynamics by recording electroencephalogram (EEG) while participants performed an attention task and periodically answered thought-sampling questions about whether their thoughts were 1) task-unrelated, 2) freely moving, 3) deliberately constrained, and 4) automatically constrained. We examined three EEG measures across different time windows as a function of each thought type: stimulus-evoked P3 event-related potentials and non–stimulus-evoked alpha power and variability. Parietal P3 was larger for task-related relative to task-unrelated thoughts, whereas frontal P3 was increased for deliberately constrained compared with unconstrained thoughts. Frontal electrodes showed enhanced alpha power for freely moving thoughts relative to non-freely moving thoughts. Alpha-power variability was increased for task-unrelated, freely moving, and unconstrained thoughts. Our findings indicate distinct electrophysiological patterns associated with task-unrelated and dynamic thoughts, suggesting these neural measures capture the heterogeneity of our ongoing thoughts. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Constrained thoughts; EEG; Freely moving thoughts; Mind wandering; Task-unrelated thoughts
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180904
作者单位	Department of Psychology, University of Calgary, Calgary, AB T2N 1N4, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB T2N 4N1, Canada; Helen Wills Neuroscience Institute, University of California, Berkeley, CA 94720, United States; Corcoran Department of Philosophy, University of Virginia, Charlottesville, VA 22904, United States; Department of Psychology, University of New Hampshire, Durham, NH 03824, United States; Department of Psychology, University of California, Berkeley, CA 94704, United States
推荐引用方式 GB/T 7714	Kam J.W.Y.,Irving Z.C.,Mills C.,et al. Distinct electrophysiological signatures of task-unrelated and dynamic thoughts[J],2021,118(4).
APA	Kam J.W.Y.,Irving Z.C.,Mills C.,Patel S.,Gopnik A.,&Knight R.T..(2021).Distinct electrophysiological signatures of task-unrelated and dynamic thoughts.Proceedings of the National Academy of Sciences of the United States of America,118(4).
MLA	Kam J.W.Y.,et al."Distinct electrophysiological signatures of task-unrelated and dynamic thoughts".Proceedings of the National Academy of Sciences of the United States of America 118.4(2021).