Sleep and NeuroImaging Center, Faculty of Psychology, Southwest University, Chongqing, 400715, China.
Key Laboratory of Cognition and Personality of Ministry of Education, Chongqing, 400715, China.
Neurosci Bull. 2018 Dec;34(6):1017-1028. doi: 10.1007/s12264-018-0278-7. Epub 2018 Aug 22.
The default mode network (DMN) is associated with the occurrence of mind-wandering or task-unrelated thought. In contrast, the frontal-parietal network (FPN) and visual network (VS) are involved in tasks with external stimuli. However, it is not clear how these functional network interactions support these two different processes - mind-wandering and on-task - especially with regard to individual variation in the mind-wandering experience. In this study, we investigated the functional connectivity and modular structure among the DMN, FPN, and VS. Our results showed that, compared to the on-task period, mind-wandering was associated with increased DMN activity and increased DMN-VS connectivity. Moreover, mind-wandering was accompanied by a large number of transitional nodes, which expressed a diversity of brain regions. Intriguingly, the functional connectivity of the FPN and VS was strongly correlated with individual behavioral performance. Our findings highlight the individual variation of mind-wandering, which implies the importance of other complementary large-scale brain networks.
默认模式网络（DMN）与思维漫游或与任务无关的思维的发生有关。相比之下，额顶网络（FPN）和视觉网络（VS）参与带有外部刺激的任务。然而，目前尚不清楚这些功能网络相互作用如何支持这两种不同的过程——思维漫游和任务相关——特别是在思维漫游体验的个体差异方面。在这项研究中，我们调查了 DMN、FPN 和 VS 之间的功能连接和模块结构。我们的结果表明，与任务相关时期相比，思维漫游与 DMN 活动增加和 DMN-VS 连接增加有关。此外，思维漫游伴随着大量的过渡节点，表达了大量的脑区多样性。有趣的是，FPN 和 VS 的功能连接与个体行为表现密切相关。我们的研究结果强调了思维漫游的个体差异，这意味着其他互补的大规模脑网络的重要性。
