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Construction of a fiber-optically connected MEG hyperscanning system for recording brain activity during real-time communication

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Title: Construction of a fiber-optically connected MEG hyperscanning system for recording brain activity during real-time communication
Authors: Watanabe, Hayato Browse this author
Shimojo, Atsushi Browse this author
Yagyu, Kazuyori Browse this author →KAKEN DB
Sonehara, Tsuyoshi Browse this author
Takano, Kazuyoshi Browse this author
Boasen, Jared Browse this author →KAKEN DB
Shiraishi, Hideaki Browse this author →KAKEN DB
Yokosawa, Koichi Browse this author →KAKEN DB
Saito, Takuya Browse this author →KAKEN DB
Issue Date: 23-Jun-2022
Publisher: PLOS
Journal Title: PLoS ONE
Volume: 17
Issue: 6
Start Page: e0270090
Publisher DOI: 10.1371/journal.pone.0270090
PMID: 35737703
Abstract: Communication is one of the most important abilities in human society, which makes clarification of brain functions that underlie communication of great importance to cognitive neuroscience. To investigate the rapidly changing cortical-level brain activity underlying communication, a hyperscanning system with both high temporal and spatial resolution is extremely desirable. The modality of magnetoencephalography (MEG) would be ideal, but MEG hyperscanning systems suitable for communication studies remain rare. Here, we report the establishment of an MEG hyperscanning system that is optimized for natural, real-time, face-to-face communication between two adults in sitting positions. Two MEG systems, which are installed 500m away from each other, were directly connected with fiber optic cables. The number of intermediate devices was minimized, enabling transmission of trigger and auditory signals with almost no delay (1.95-3.90 mu s and 3 ms, respectively). Additionally, video signals were transmitted at the lowest latency ever reported (60-100 ms). We furthermore verified the function of an auditory delay line to synchronize the audio with the video signals. This system is thus optimized for natural face-to-face communication, and additionally, music-based communication which requires higher temporal accuracy is also possible via audio-only transmission. Owing to the high temporal and spatial resolution of MEG, our system offers a unique advantage over existing hyperscanning modalities of EEG, fNIRS, or fMRI. It provides novel neuroscientific methodology to investigate communication and other forms of social interaction, and could potentially aid in the development of novel medications or interventions for communication disorders.
Type: article
Appears in Collections:保健科学院・保健科学研究院 (Graduate School of Health Sciences / Faculty of Health Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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