Mapping the information flow from one brain to another during gestural communication.

Area of Science:

• Neuroscience
• Social Cognition
• Cognitive Science

Background:

• The putative mirror neuron system (pMNS) and ventral medial prefrontal cortex (vmPFC) are crucial for social interaction.
• The pMNS is theorized to 'resonate' with others' actions, while vmPFC is linked to mentalizing.
• Previous research has not directly investigated the resonance property of the pMNS over continuous actions.

Purpose of the Study:

• To investigate the resonance property of the pMNS during continuous social interaction.
• To explore real-time neural synchrony between individuals engaged in a shared task.
• To provide empirical evidence for theories of brain-to-brain resonance.

Main Methods:

• Participants played charades while their brain activity was measured using functional MRI.
• Between-brain Granger-causality mapping was employed to detect directed influences between brains.
• Analysis focused on the temporal structure of neural activity during action execution and observation.

Main Results:

• Brain activity in the guesser's mentalizing and mirroring regions showed temporal echoes of the gesturer's brain activity.
• Evidence of resonance was found, indicating continuous, fine-grained temporal interplay between brains.
• The study demonstrated directed influences between the neural activity of interacting individuals.

Conclusions:

• The findings support resonance theories of social interaction, highlighting a dynamic neural interplay.
• This research establishes a method for ecologically valid social interaction studies.
• The approach may offer insights into the neural underpinnings of social deficits like autism spectrum disorder.