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Neural Processes Linking Interoception to Moral Preferences Aligned with Group Consensus.

JuYoung Kim1, Hackjin Kim2

  • 1Laboratory of Social and Decision Neuroscience, School of Psychology, Korea University, Seoul 02841, Republic of Korea.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|May 5, 2025
PubMed
Summary

This study reveals that better interoceptive awareness, the sense of internal body signals, is linked to moral decisions aligning with social norms. Brain activity in key regions mediates this connection, offering insights into moral decision-making.

Keywords:
allostasisheartbeat detection taskhidden Markov modelmedial prefrontal cortexprecuneusresting-state fMRI

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Area of Science:

  • Neuroscience
  • Moral Psychology
  • Cognitive Science

Background:

  • Moral decision-making involves aligning actions with social norms and expectations.
  • Intuitive moral preferences guide choices amid conflicting values.
  • A proposed link exists between interoceptive awareness and moral preferences, but lacks empirical validation.

Purpose of the Study:

  • To empirically investigate the relationship between interoceptive awareness and moral preferences.
  • To explore the neural mechanisms underlying this connection.

Main Methods:

  • Two independent experiments were conducted.
  • Interoception was measured using self-report, a heartbeat counting task, and resting-state functional magnetic resonance imaging (fMRI).
  • Moral preferences aligned with group consensus were assessed.

Main Results:

  • Participants' interoceptive awareness and accuracy correlated with moral preferences that aligned with group consensus.
  • The fractional occupancies of resting-state brain networks involving the ventromedial prefrontal cortex and precuneus mediated this association.
  • This relationship was observed in both male and female participants.

Conclusions:

  • This study provides the first empirical evidence linking interoception to moral preferences aligned with group consensus.
  • Neural mechanisms involving the ventromedial prefrontal cortex and precuneus are implicated in this link.
  • Findings contribute to understanding the neurobiological basis of social conformity in moral judgments.