Key Laboratory of Cognition and Personality (Ministry of Education), Chongqing, 400715, China; School of Psychology, Southwest University, Chongqing, 400715, China; Beijing Key Lab of Applied Experimental Psychology, Faculty of Psychology, Beijing Normal University, Beijing, 100875, China.
Key Laboratory of Cognition and Personality (Ministry of Education), Chongqing, 400715, China; School of Psychology, Southwest University, Chongqing, 400715, China.
Neuropsychologia. 2021 Jan 8;150:107674. doi: 10.1016/j.neuropsychologia.2020.107674. Epub 2020 Nov 10.
Mind wandering (MW) refers to a drift of attention away from the ongoing events to internal concerns and activates brain regions in the default mode network (DMN) and the frontoparietal control network (FPCN). Although a number of studies using rest-fMRI data have shown that static and dynamic functional connectivity within the DMN were related to individual variations in self-reported MW, whether the brain functional connectivity could predict MW remained unclear. Here, we carried out longitudinal data collection from 122 participants that underwent three times of MRI scans and simultaneously completed self-reported MW scales over the course of two years to clarify whether a direct relationship existed between brain functional connectivity and MW. We identified 16 functional connectivity involving the DMN and FPCN that were consistently and stably associated with MW across the three time points. However, there were only significant cross-lagged effects between DMN-involved connections and MW frequency rather than FPCN-involved connections. In addition, the results indicated that the mean value of functional connectivity involving the DMN (FC-DMN) in the low stable (LS) group was the weakest, followed by mean connectivity in the moderate increasing (MI) group and mean connectivity in the high stable (HS) group. These results support previous research linking MW with connections between partial areas involving the DMN and FPCN. Importantly, our findings indicated that brain functional connectivity involving DMN predicted the subsequent MW and provided further support for the trait-based nature of MW.
走神（MW）是指注意力从正在进行的事件上漂移到内部关注，激活默认模式网络（DMN）和额顶控制网络（FPCN）中的大脑区域。尽管许多使用静息 fMRI 数据的研究表明，DMN 内的静态和动态功能连接与个体自我报告的 MW 变化有关，但大脑功能连接是否可以预测 MW 尚不清楚。在这里，我们对 122 名参与者进行了纵向数据采集，他们在两年内进行了三次 MRI 扫描，并同时完成了自我报告的 MW 量表，以明确大脑功能连接与 MW 之间是否存在直接关系。我们确定了 16 个涉及 DMN 和 FPCN 的功能连接，这些连接在三个时间点都与 MW 一致且稳定相关。然而，只有 DMN 相关连接与 MW 频率之间存在显著的交叉滞后效应，而不是 FPCN 相关连接。此外，结果表明，在低稳定（LS）组中，涉及 DMN 的功能连接的平均值（FC-DMN）最弱，其次是中等增加（MI）组的平均值和高稳定（HS）组的平均值。这些结果支持了先前将 MW 与涉及 DMN 和 FPCN 的部分区域之间的连接联系起来的研究。重要的是，我们的发现表明，涉及 DMN 的大脑功能连接预测了随后的 MW，并为 MW 的基于特征的性质提供了进一步的支持。
