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Exploring the Neural Correlates of Cognitive Reappraisal in Obsessive-Compulsive Disorder Using Task-based Functional Magnetic Resonance Imaging
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The association between local brain structure and disgust propensity.

Albert Wabnegger1, Carina Schlintl1, Anne Schienle2,3

  • 1Department of Clinical Psychology, University of Graz, Universitätsplatz 2/DG, 8010, Graz, Austria.

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Summary

Brain structure varies with personality. This study found weak links between disgust propensity (DP) and grey matter volume (GMV) in specific brain regions like the insula and orbitofrontal cortex (OFC).

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Area of Science:

  • Neuroscience
  • Psychology

Background:

  • Personality traits are associated with structural brain differences.
  • Disgust propensity (DP) is a stable tendency to experience disgust.
  • Understanding the neural basis of DP can illuminate emotional processing.

Purpose of the Study:

  • To investigate the association between disgust propensity (DP) and grey matter volume (GMV).
  • To examine DP domains (core, animal-reminder, contamination) in relation to specific brain regions (insula, orbitofrontal cortex, basal ganglia).

Main Methods:

  • Voxel-based morphometry study on 498 healthy individuals.
  • Structural brain scans analyzed using regression analyses.
  • Correlations assessed between DP domains and GMV in the insula, orbitofrontal cortex (OFC), and basal ganglia.

Main Results:

  • Negative correlation found between animal-reminder DP and insula volume.
  • Negative correlation observed between contamination DP and OFC volume.
  • Positive correlation noted between animal-reminder DP and basal ganglia (putamen) GMV.

Conclusions:

  • Identified weak correlations between local brain volume and disgust propensity.
  • Findings suggest the posterior insula, not anterior, is associated with animal-reminder DP, challenging existing theories.
  • The study provides nuanced insights into the neuroanatomical correlates of disgust propensity.