Construction of a fiber-optically connected MEG hyperscanning system for recording brain activity during real-time communication
Construction of a fiber-optically connected MEG hyperscanning system for recording brain activity during real-time communication
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DOI：
10.1371/journal.pone.0270090
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发表时间：
2022-06-23
期刊：
影响因子：
3.7
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中科院分区：
文献类型：
--
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沟通是人类社会最重要的能力之一，这使得阐明沟通背后的大脑功能对认知神经科学具有重要意义。为了研究快速变化的皮层水平的大脑活动背后的通信，超扫描系统具有高的时间和空间分辨率是非常可取的。脑磁图（MEG）的模式将是理想的，但适合通信研究的MEG超扫描系统仍然很少见。在这里，我们报告了一个MEG超扫描系统的建立，该系统针对两个成年人在坐姿下的自然，实时，面对面的交流进行了优化。两个MEG系统安装在相距500 m的地方，通过光缆直接连接。中间设备的数量被最小化，使得触发和听觉信号的传输几乎没有延迟（分别为1.95-3.90 μs和3 ms）。此外，视频信号以有史以来最低的延迟（60-100 ms）传输。我们进一步验证了听觉延迟线的功能，以同步音频与视频信号。因此，该系统针对自然的面对面通信进行了优化，并且另外，需要更高时间精度的基于音乐的通信也可以经由仅音频传输。由于MEG的高时间和空间分辨率，我们的系统提供了一个独特的优势，超过现有的超扫描模式的EEG，fNIRS，或fMRI。它提供了新的神经科学方法来研究沟通和其他形式的社会互动，并可能有助于开发新的药物或干预沟通障碍。
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 μs 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.
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