Individual differences in disgust imagery: a functional magnetic resonance imaging study.

Area of Science:

• Neuroscience
• Psychology
• Brain Imaging

Background:

• Functional magnetic resonance imaging (fMRI) has explored neural correlates of disgust imagery.
• Previous studies have not investigated the moderating effects of personality traits on these neural correlates.
• Understanding individual differences in disgust processing is crucial for psychological and neurological research.

Purpose of the Study:

• To investigate the neural correlates of disgust and happiness imagery.
• To examine the moderating effect of trait disgust on brain activation during imagery.
• To provide evidence for the association between disgust propensity and brain activation patterns.

Main Methods:

• Twenty-four female participants underwent fMRI scans.
• Participants viewed and visualized images with disgust-inducing and happiness-inducing content.
• Brain activation was measured during picture perception and subsequent imagery tasks.

Main Results:

• Disgust and happiness imagery, compared to perception, activated the insula, anterior cingulate cortex, and parietal cortex.
• Trait disgust showed a negative correlation with brain activation in regions including the insula, amygdala, parietal cortex, and anterior cingulate cortex during disgust imagery.
• This suggests that individuals with higher disgust propensity exhibit distinct neural responses during the visualization of repulsive scenes.

Conclusions:

• This study offers the first evidence linking disgust propensity to specific brain activation patterns during disgust imagery.
• Personality traits, specifically trait disgust, significantly moderate neural responses to visualized disgust stimuli.
• Findings contribute to understanding the neurobiological basis of individual differences in emotion processing and regulation.