Synchronous brain activity across individuals underlies shared psychological perspectives

Area of Science:

• Neuroscience
• Cognitive Science
• Social Psychology

Background:

• Successful communication relies on shared understanding of the external world.
• Cognitive schemas and psychological perspectives filter sensory information, guiding interpretation and storage.
• Neural mechanisms underlying shared understanding are not fully understood.

Purpose of the Study:

• To investigate if adopting similar psychological perspectives during natural viewing synchronizes brain activity.
• To identify brain regions where synchronized activity correlates with shared perspectives.
• To explore the neural basis of shared environmental understanding.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to measure brain activity in 33 healthy participants.
• Participants viewed a movie twice, adopting either a 'social' (detective) or 'non-social' (interior decorator) perspective.
• Inter-subject correlations (ISCs) of fMRI data were calculated to measure brain activity similarity.

Main Results:

• Brain activity synchronization (ISC) was significantly stronger in specific regions when participants shared a perspective.
• Robust synchronization was observed in the parahippocampal gyrus, posterior parietal cortex, and lateral occipital cortex.
• Synchronization was independent of differences in visual sampling (eye gaze).

Conclusions:

• Synchronous brain activity across individuals with similar psychological perspectives is a potential neural mechanism for shared understanding.
• This finding highlights the role of neural synchronization in facilitating consistent environmental perception and communication.
• Shared perspectives shape neural processing, leading to coordinated brain activity patterns.