Cheng, Pan, Hu, Hu (2019) Coordination Elicits Synchronous Brain Activity Between Co-actors: Frequency Ratio Matters Frontiers in neuroscience 13() 1071
People could behave in two different ways when engaging in interpersonal coordination activities: moving at the same frequency (isofrequency pattern, IP; the movement frequency ratio is 1:1) or at different frequencies (multifrequency pattern, MP; the movement frequency ratio is non 1:1). However, how the interpersonal coordination pattern modulates coordination outcome and the related brain-to-brain connectivity is not fully understood. Here, we adopted a continuous joint drawing task in which two participants co-drew parallelogram shapes according to two coordination patterns (i.e., IP vs. MP) while their brain activities were simultaneously recorded by the functional near-infrared spectroscopy (fNIRS) based hyperscanning technique. Dyads showed better coordination performance, as well as relatively greater interpersonal brain synchronization (IBS) at the left frontopolar area, in the MP condition compared to the IP condition. Granger causality analyses further disclosed the bidirectional influences between the brains of the coordinating individuals. Such interpersonal influences were enhanced when individuals coordinated in the MP condition. Finally, the IBS during coordination was related to the dyadic self-control level. Taken together, our study revealed that interpersonal multifrequency coordination pattern facilitates the coordination efficiency, which was associated with the enhanced brain-to-brain connectivity. Our work also suggests the potentially positive role of self-control during the interpersonal coordination process. Copyright © 2019 Cheng, Pan, Hu and Hu.
人们在进行人际协调活动时可能会以两种不同的方式表现：以相同的频率移动（等频率模式，IP；移动频率比为1：1）或以不同的频率移动（多频率模式，MP；移动频率比为非1：1）。但是，人际协调模式如何调节协调结果以及相关的脑-脑连接性尚不完全清楚。在这里，我们采用了一个连续的联合绘制任务，其中两个参与者根据两种协调模式（即IP与MP）共同绘制平行四边形形状，而他们的大脑活动同时通过基于功能近红外光谱（fNIRS）的超扫描记录技术。与IP条件相比，在MP条件下，双性体表现出更好的协调性能，并且在左前极区的人际脑同步性（IBS）相对更大。 Granger因果关系分析进一步揭示了协调个体的大脑之间的双向影响。当个人在MP情况下进行协调时，这种人际关系的影响就会增强。最后，IBS在协调过程中与二进制自我控制水平有关。两者合计，我们的研究表明，人际多频协调模式可促进协调效率，这与增强的脑脑连通性有关。我们的工作还暗示了自我控制在人际协调过程中的潜在积极作用。版权所有©2019 Cheng，Pan，Hu and Hu。