Yoneta Nano, Watanabe Hayato, Shimojo Atsushi, Takano Kazuyoshi, Saito Takuya, Yagyu Kazuyori, Shiraishi Hideaki, Yokosawa Koichi, Boasen Jared
Graduate School of Health Sciences, Hokkaido University, Sapporo, Japan.
Faculty of Health Sciences, Hokkaido University, Sapporo, Japan.
Front Neurosci. 2022 Aug 2;16:790057. doi: 10.3389/fnins.2022.790057. eCollection 2022.
Auditory communication is an essential form of human social interaction. However, the intra-brain cortical-oscillatory drivers of auditory communication exchange remain relatively unexplored. We used improvisational music performance to simulate and capture the creativity and turn-taking dynamics of natural auditory communication. Using magnetoencephalography (MEG) hyperscanning in musicians, we targeted brain activity during periods of music communication imagery, and separately analyzed theta (5-7 Hz), alpha (8-13 Hz), and beta (15-29 Hz) source-level activity using a within-subjects, two-factor approach which considered the assigned social role of the subject (leader or follower) and whether communication responses were improvisational (yes or no). Theta activity related to improvisational communication and social role significantly interacted in the left isthmus cingulate cortex. Social role was furthermore differentiated by pronounced occipital alpha and beta amplitude increases suggestive of working memory retention engagement in Followers but not Leaders. The results offer compelling evidence for both musical and social neuroscience that the cognitive strategies, and correspondingly the memory and attention-associated oscillatory brain activities of interlocutors during communication differs according to their social role/hierarchy, thereby indicating that social role/hierarchy needs to be controlled for in social neuroscience research.
听觉交流是人类社会互动的一种重要形式。然而，听觉交流过程中大脑内部的皮层振荡驱动因素仍相对未被探索。我们利用即兴音乐表演来模拟和捕捉自然听觉交流的创造性和轮流互动动态。通过对音乐家进行脑磁图（MEG）超扫描，我们针对音乐交流想象期间的大脑活动，并使用一种受试者内双因素方法分别分析了theta（5 - 7赫兹）、alpha（8 - 13赫兹）和beta（15 - 29赫兹）源水平活动，该方法考虑了受试者所分配的社会角色（领导者或跟随者）以及交流反应是否为即兴的（是或否）。与即兴交流和社会角色相关的theta活动在左侧扣带峡部皮层中存在显著交互作用。此外，社会角色还通过枕叶alpha和beta振幅的明显增加来区分，这表明跟随者而非领导者的工作记忆保持参与度较高。这些结果为音乐神经科学和社会神经科学提供了有力证据，即交流过程中对话者的认知策略以及相应的与记忆和注意力相关的振荡脑活动会根据他们的社会角色/等级制度而有所不同，从而表明在社会神经科学研究中需要控制社会角色/等级制度这一因素。
