Interacting brains coming in sync through their minds: an interbrain neurofeedback study,Annals of the New York Academy of Sciences

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Interacting brains coming in sync through their minds: an interbrain neurofeedback study
Annals of the New York Academy of Sciences ( IF 4.1 ) Pub Date : 2021-05-06 , DOI: 10.1111/nyas.14605
Viktor Müller ₁ , Dionysios Perdikis _{1,

2} , Melinda A Mende _{1,

3} , Ulman Lindenberger _{1,

4,

5}

Affiliation

Neurophysiological evidence shows that interpersonal action coordination is accompanied by interbrain synchronization (IBS). However, the functional significance of this association remains unclear. Using two experimental designs, we explored whether IBS is amenable to neurofeedback (NFB). Feedback was provided either as two balls approaching each other (so-called ball design), or as two pendula, each reflecting the oscillatory activity of one of the two participants (so-called pendulum design). The NFB was provided at delta (i.e., 2.5 Hz) and theta (i.e., 5 Hz) electroencephalography frequencies, and manipulated by enhanced and inverse feedback. We showed that the participants were able to increase IBS by using NFB, especially when it was fed back at the theta frequency. Apart from intra- and interbrain coupling, other oscillatory activities (e.g., power spectral density, peak amplitude, and peak frequency) also changed during the task compared with the rest. Moreover, all the measures showed specific correlations with the subjective postsurvey item scores, reflecting subjective feeling and appraisal. We conclude that the use of IBS for NFB might help in specifying the contribution of IBS to interpersonal action coordination and in providing important information about the neural mechanisms of social interaction and the causal dimension of IBS.

中文翻译：

通过他们的思想同步互动的大脑：一项脑间神经反馈研究

神经生理学证据表明，人际行动协调伴随着脑间同步（IBS）。然而，这种关联的功能意义仍不清楚。使用两个实验设计，我们探索了 IBS 是否适合神经反馈 (NFB)。反馈要么是两个球相互靠近（所谓的球设计），要么是两个钟摆，每一个都反映了两个参与者之一的振荡活动（所谓的钟摆设计）。NFB 以 delta（即 2.5 Hz）和 theta（即 5 Hz）脑电图频率提供，并通过增强和反向反馈进行操作。我们表明参与者能够通过使用 NFB 来增加 IBS，特别是当它以 theta 频率反馈时。除了脑内和脑间耦合外，与其他活动相比，其他振荡活动（例如，功率谱密度、峰值幅度和峰值频率）在任务期间也发生了变化。此外，所有的措施都显示出与主观后调查项目分数的特定相关性，反映了主观感受和评价。

更新日期：2021-05-06

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