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Corticolimbic Structural Deficits in Violent Patients with Schizophrenia
Maria Athanassiou1,2, Alexandre Dumais1,2,3, Inès Zouaoui1,2
1Centre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC H1N 3V2, Canada.
Brain Sciences
|March 28, 2025
Summary
Structural brain abnormalities, including reduced gray matter in the right amygdala and thinner cortex in the dorsolateral prefrontal cortex (dlPFC), are linked to violent behaviors in schizophrenia patients.
Area of Science:
- Neuroscience
- Psychiatry
- Neuroimaging
Background:
- Violent behaviors are infrequent but stigmatizing in schizophrenia.
- Understanding the neurobiology of violence in schizophrenia is crucial for treatment.
Purpose of the Study:
- Identify structural brain abnormalities associated with violent behaviors in schizophrenia.
- Utilize a validated tool for assessing violence and conduct region-of-interest neuroimaging analyses.
Main Methods:
- Compared gray matter volume (GMV) and cortical thickness (CT) in 83 participants (schizophrenia with violence, schizophrenia without violence, healthy controls).
- Focused neuroimaging analyses on brain regions implicated in aggression and violence.
Main Results:
- Patients with schizophrenia and violent behaviors (Sch+V) showed reduced right amygdala GMV and bilateral dlPFC CT compared to other groups.
- Right amygdalar volume negatively correlated with hostility scores in the Sch+V group.
Conclusions:
- Violent schizophrenia patients exhibit structural disruptions in the dlPFC (inhibitory control) and amygdala (emotional processing).
- Further research should explore functional network interactions to understand the neurobiology of violence in schizophrenia.
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