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Article published In: Gesture
Vol. 19:2/3 (2020) ► pp.196–222

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Social hyperscanning with fNIRS

Intra-brain and inter-brain connectivity for social, affective, and informative gestures reproduction

 | Catholic University of the Sacred Heart
 | Université de Lille | Institut Universitaire de France (IUF)
 | Catholic University of the Sacred Heart
Published online: 28 September 2021
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https://doi.org/10.1075/gest.20013.bal
Abstract
The interest of neuroscience has been aimed at the investigation of the neural bases underlying gestural communication. This research explored the intra- and inter-brain connectivity between encoder and decoder. Specifically, adopting a “hyperscanning paradigm” with the functional Near-infrared Spectroscopy (fNIRS) cerebral connectivity in oxygenated (O2Hb) and deoxygenated (HHb) hemoglobin levels were revealed during the reproduction of affective, social, and informative gestures of different valence. Results showed an increase of intra- and inter-brain connectivity in dorsolateral prefrontal cortex for affective gestures, in superior frontal gyrus for social gestures and in frontal eyes field for informative gestures. Moreover, encoder showed a higher intra-brain connectivity in posterior parietal areas more than decoder. Finally, an increasing of inter-brain connectivity more than intra-brain (ConIndex) was observed in left regions for positive gestures. The present research has explored how the individuals neural tuning mechanisms turn out to be strongly influenced by the nature of specific gestures.
Article outline
  • Introduction
  • Materials and methods
    • Subjects
    • Procedure
    • Stimuli
    • fNIRS recording and signal processing
  • Data analysis
  • Results
    • Intra-brain connectivity
    • Inter-brain connectivity
    • ConIndex
  • Discussion
  • Conflict of interest
  • Data availability statement
  • References
References (82)
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