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Associations of brain structure with psychopathy
Peter Pieperhoff1, Lena Hofhansel2,3, Frank Schneider4
1Institute of Neuroscience and Medicine (INM-1), Research Centre Jülich, Jülich, Germany. p.pieperhoff@fz-juelich.de.
Summary
Psychopathy is linked to reduced brain volumes in specific areas, particularly those involved in behavioral control. Antisocial behavior in psychopathy strongly correlates with smaller volumes in widespread subcortical-cortical brain regions.
Area of Science:
- Neuroscience
- Psychiatry
- Brain Imaging
Background:
- Psychopathy is a major risk factor for persistent violence.
- Understanding the neurobiological basis of psychopathy is crucial for intervention.
Purpose of the Study:
- To investigate the neurobiological substrates of psychopathy using structural MRI.
- To correlate brain region volumes with psychopathy dimensions.
Main Methods:
- Structural MRI scans of 39 male psychopathic subjects and matched controls.
- Brain region volumes calculated using Julich-Brain and AAL3 atlases.
- Analysis of associations between Psychopathy Check-List (PCL-R) scores and brain volumes.
Main Results:
- PCL-R Factor 2 (antisocial behavior) negatively correlated with volumes in pons, basal ganglia, thalamus, basal forebrain, cerebellum, orbitofrontal, dorsolateral-frontal, and insular cortices.
- PCL-R Factor 1 (interpersonal-affective) showed weaker associations with orbitofrontal, dorsolateral-frontal, and hippocampal areas.
- Psychopathic subjects had significantly reduced total brain volume compared to controls, with notable differences in the right subiculum.
Conclusions:
- Findings suggest dysfunction in frontal-subcortical circuits related to behavioral control in psychopathy.
- Brain structural deviations in psychopathy appear interindividually variable.
- Antisocial behavior in psychopathy is strongly associated with smaller volumes in widespread subcortical-cortical brain regions.
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