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Voxel-based morphometry of disgust sensitivity.

Albert Wabnegger1, Sonja Übel1, Anne Schienle1

  • 1a Department of Psychology, Section Clinical Psychology , University of Graz, BioTechMedGraz , Graz , Austria.

Social Neuroscience
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Summary

Difficulties regulating emotions, especially disgust, are linked to specific frontal brain gray matter volume (GMV) differences. This neuroimaging study reveals distinct patterns in the orbitofrontal and medial prefrontal cortex.

Keywords:
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Area of Science:

  • Neuroimaging
  • Neuroscience
  • Emotion Regulation

Background:

  • Negative affect regulation is widely studied in neuroimaging.
  • Dysregulation of specific emotions, like disgust, is under-researched.
  • Investigating the neural correlates of disgust sensitivity is crucial.

Purpose of the Study:

  • To explore the relationship between gray matter volume (GMV) in frontal regions and emotion regulation.
  • To identify if GMV differences are associated with general and disgust-specific emotion regulation difficulties.
  • To understand the neuroanatomy underlying disgust sensitivity.

Main Methods:

  • Voxel-based morphometry (VBM) was used to analyze brain structure.
  • T1-weighted MRI scans of 49 female participants were analyzed.
  • Participants completed questionnaires on disgust sensitivity (DS) and general emotion regulation.

Main Results:

  • A heightened GMV in the orbitofrontal cortex correlated with both DS and general emotion regulation deficits.
  • Disgust sensitivity (DS) showed a negative association with GMV in the medial prefrontal cortex.
  • These findings suggest distinct neural bases for disgust-specific and general emotion regulation.

Conclusions:

  • Frontal brain regions contribute uniquely to disgust-specific and general emotion regulation.
  • Orbitofrontal cortex GMV is linked to difficulties in controlling disgust and general emotions.
  • Medial prefrontal cortex GMV may play a distinct role in disgust regulation.