Thoughts of death affect reward learning by modulating salience network activity.

Area of Science:

• Neuroscience
• Psychology
• Cognitive Science

Background:

• Mortality salience significantly influences human behavior and psychological well-being.
• Terror management theory explains existential anxiety mechanisms.
• Neural underpinnings of mortality salience effects on behavior are poorly understood.

Purpose of the Study:

• Investigate brain responses to mortality reminders.
• Understand how mortality salience modulates neural activity and subsequent behavior.
• Provide a neural basis for behavior under mortality threat.

Main Methods:

• Functional magnetic resonance imaging (fMRI) on 80 healthy adults.
• Participants read death-related and neutral sentences.
• Assessed resting-state functional connectivity and reward learning tasks.

Main Results:

• Death-related thoughts decreased salience network activity.
• Reduced cingulate cortex connectivity and dampened reward learning speed observed.
• Decreased cingulate connectivity mediated the link between mortality salience and behavioral changes.

Conclusions:

• Mortality salience sequentially modulates salience network activity.
• Neural changes in the cingulate cortex are linked to behavioral responses to mortality threat.
• Findings offer a neural framework for understanding human behavior under existential threat.