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Imaging real-time tactile interaction with two-person dual-coil fMRI

Ville Renvall, Jaakko Kauramäki, Sanna Malinen, Riitta Hari, View ORCID ProfileLauri Nummenmaa
doi: https://doi.org/10.1101/861252
Ville Renvall
1Department of Neuroscience and Biomedical Engineering, Aalto University School of Science, Espoo, Finland
2Advanced Magnetic Imaging Centre, Aalto University School of Science, Espoo, Finland
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Jaakko Kauramäki
1Department of Neuroscience and Biomedical Engineering, Aalto University School of Science, Espoo, Finland
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Sanna Malinen
1Department of Neuroscience and Biomedical Engineering, Aalto University School of Science, Espoo, Finland
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Riitta Hari
1Department of Neuroscience and Biomedical Engineering, Aalto University School of Science, Espoo, Finland
3Department of Art, Aalto University School of Arts, Design and Architecture
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Lauri Nummenmaa
1Department of Neuroscience and Biomedical Engineering, Aalto University School of Science, Espoo, Finland
4Turku PET Centre and Department of Psychology, University of Turku, Turku, Finland
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  • ORCID record for Lauri Nummenmaa
  • For correspondence: latanu@utu.fi
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Summary

Studies of brain mechanisms supporting social interaction are demanding because real interaction only occurs when the persons are in contact. Instead, most brain imaging studies scan subjects individually. Here we present a proof-of-concept demonstration of a two-person blood oxygenation dependent (BOLD) imaging of brain activity from two individuals interacting inside the bore of a single MRI scanner. We developed a custom 16-channel (8 + 8 channels) two-helmet coil with two separate receiving elements providing whole-brain coverage, while bringing participants into a shared physical space and realistic face-to-face contact. Ten subject pairs were scanned with the setup. During the experiment, subjects took turns in tapping each other’s’ lip versus observing and feeling the taps timed by auditory instructions. Networks of sensorimotor brain areas were engaged alternatingly in the subjects during executing motor actions as well as observing and feeling them; these responses were clearly distinguishable from the auditory responses occurring similarly in both participants. Even though the signal-to-noise ratio of our coil system was compromised compared with standard 32-channel head coils, our results show that the two-person fMRI scanning is a feasible in studying the brain basis of social interaction.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. All rights reserved. No reuse allowed without permission.
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Posted December 10, 2019.
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Imaging real-time tactile interaction with two-person dual-coil fMRI
Ville Renvall, Jaakko Kauramäki, Sanna Malinen, Riitta Hari, Lauri Nummenmaa
bioRxiv 861252; doi: https://doi.org/10.1101/861252
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Imaging real-time tactile interaction with two-person dual-coil fMRI
Ville Renvall, Jaakko Kauramäki, Sanna Malinen, Riitta Hari, Lauri Nummenmaa
bioRxiv 861252; doi: https://doi.org/10.1101/861252

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