Brain activity and prosocial behavior in a simulated life-threatening situation

Area of Science:

• Neuroscience
• Social Psychology
• Decision Science

Background:

• Understanding the neural underpinnings of altruism and selfishness is crucial for comprehending complex social behaviors.
• Simulated life-threatening scenarios provide a controlled environment to study decision-making under duress.

Purpose of the Study:

• To investigate the functional brain network connectivity differences between individuals exhibiting selfish versus altruistic behavior in a simulated crisis.
• To identify specific brain regions and networks associated with prosocial and self-benefit choices.

Main Methods:

• Utilized a virtual reality simulation of a building fire evacuation scenario.
• Employed group independent component analysis (gICA) on blood-oxygen-level-dependent (BOLD) functional imaging data.
• Analyzed functional connectivity differences between selfish and prosocial participant groups.

Main Results:

• The selfish group showed increased functional connectivity in the salience network (anterior insula, anterior mid cingulate cortex).
• The prosocial group exhibited higher activity in the medial prefrontal cortex and temporo-parietal junction.
• Enhanced salience network connectivity correlated with more selfish decisions, indicating heightened threat sensitivity.

Conclusions:

• Increased salience network connectivity may drive selfish behavior by amplifying threat perception.
• Medial prefrontal cortex and temporo-parietal junction engagement supports prosocial behavior, potentially through perspective-taking mechanisms.
• This study offers novel neurophysiological insights into prosocial decision-making in threatening contexts.