Transient brain networks underlying interpersonal strategies during synchronized action

Area of Science:

• Neuroscience
• Cognitive Science
• Social Interaction

Background:

• Interpersonal coordination is fundamental to human interaction.
• Synchronization strategies like mutual adaptation and leading-leading emerge in dyadic interactions.
• Brain mechanisms underlying these synchronization strategies are not well understood.

Purpose of the Study:

• To identify individual brain mechanisms associated with distinct interpersonal coordination strategies.
• To investigate differences in brain activity between musicians employing mutual adaptation versus leading-leading synchronization.

Main Methods:

• Electroencephalography (EEG) was used to record brain activity.
• Two groups of musicians, categorized by their synchronization strategy (mutual adaptation vs. leading-leading), were compared.
• Analysis focused on phase-locked activity and information flow directionality within brain networks.

Main Results:

• Individuals using mutual adaptation displayed more frequent phase-locked activity in an alpha-range action-perception network compared to the leading-leading group.
• Significant changes in the directionality of within-network information flow were observed in parietal and temporal brain regions.
• These findings suggest a link between extrinsic coupling in computational models and brain network dynamics.

Conclusions:

• Enhanced coupling within the action-perception network may facilitate mutual adaptation strategies.
• Brain network dynamics, particularly information flow, play a crucial role in interpersonal coordination.
• This research provides insights into the neural basis of social interaction strategies.