An Internet-Based Real-Time Audiovisual Link for Dual MEG Recordings

Andrey V. Zhdanov · Jussi Nurminen · Pamela Baess · Lotta Hirvenkari · Veikko Jousmäki · Jyrki P. Mäkelä +4 more

47 citations0/0 files storedPLoS ONE

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Action Observation and Synchronization EEG and Brain-Computer Interfaces Neural dynamics and brain function

Abstract

HYPERSCANNING: Most neuroimaging studies of human social cognition have focused on brain activity of single subjects. More recently, "two-person neuroimaging" has been introduced, with simultaneous recordings of brain signals from two subjects involved in social interaction. These simultaneous "hyperscanning" recordings have already been carried out with a spectrum of neuroimaging modalities, such as functional magnetic resonance imaging (fMRI), electroencephalography (EEG), and functional near-infrared spectroscopy (fNIRS). DUAL MEG SETUP: We have recently developed a setup for simultaneous magnetoencephalographic (MEG) recordings of two subjects that communicate in real time over an audio link between two geographically separated MEG laboratories. Here we present an extended version of the setup, where we have added a video connection and replaced the telephone-landline-based link with an Internet connection. Our setup enabled transmission of video and audio streams between the sites with a one-way communication latency of about 130 ms. Our software that allows reproducing the setup is publicly available. VALIDATION: We demonstrate that the audiovisual Internet-based link can mediate real-time interaction between two subjects who try to mirror each others' hand movements that they can see via the video link. All the nine pairs were able to synchronize their behavior. In addition to the video, we captured the subjects' movements with accelerometers attached to their index fingers; we determined from these signals that the average synchronization accuracy was 215 ms. In one subject pair we demonstrate inter-subject coherence patterns of the MEG signals that peak over the sensorimotor areas contralateral to the hand used in the task.

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References

2002Hyperscanning: Simultaneous fMRI during Linked Social Interactions 2011NIRS-based hyperscanning reveals increased interpersonal coherence in superior frontal cortex during cooperation 2009Brain Basis of Human Social Interaction: From Concepts to Brain Imaging 2012Neural Synchronization during Face-to-Face Communication 2009Brains swinging in concert: cortical phase synchronization while playing guitar 1992Lipreading and audio-visual speech perception 2012Intra- and interbrain synchronization and network properties when playing guitar in duets 2011From social behaviour to brain synchronization: Review and perspectives in hyperscanning

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2020The integration of social and neural synchrony: a case for ecologically valid research using MEG neuroimaging

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