Moral judgment modulation by disgust priming via altered fronto-temporal functional connectivity.

Area of Science:

• Neuroscience
• Social Psychology
• Moral Cognition

Background:

• Moral judgments integrate conscious reasoning with social and emotional information.
• Individual sensitivity to disgust influences moral judgments, affecting hypothetical and real-world scenarios.

Purpose of the Study:

• To investigate the neural circuitry behind disgust modulation of moral judgments.
• To examine how subliminal disgust stimuli affect moral decision-making and its neural correlates.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used on 19 participants.
• Participants performed a moral judgment task with subliminal priming of disgust facial expressions.

Main Results:

• Individual variations in moral acceptability changes correlated with dorsomedial prefrontal cortex (dmPFC) activation.
• Functional connectivity between dmPFC and temporal-parietal junction (TPJ) changed with disgust priming.
• High sensitivity individuals showed enhanced TPJ-dmPFC connectivity, rating dilemmas as more acceptable; low sensitivity individuals showed the opposite pattern.

Conclusions:

• Disgust stimuli modulate moral judgments by altering social information integration for subjective valuation.
• Neural findings in dmPFC and TPJ suggest a mechanism for how emotions impact moral decision-making.
• Replication in dorsal anterior cingulate cortex (daMCC) supports its role in subjective valuation during moral judgments.