MRI Study of the Brain Structural Characteristic in Persecutory Delusions

Area of Science:

• Neuroimaging
• Psychiatry
• Neuroscience

Background:

• Persecutory delusions are a common symptom in schizophrenia (F20) and delusional disorder (F22.0).
• Understanding the neurobiological underpinnings of delusions is crucial for developing targeted treatments.
• Previous research has shown varied structural brain abnormalities in psychotic disorders.

Purpose of the Study:

• To investigate structural brain differences in patients with persecutory delusions compared to healthy controls.
• To examine cortical thickness, subcortical volumes, hippocampal subfields, and brainstem structures.
• To analyze findings within the transnosological model of delusions.

Main Methods:

• Structural magnetic resonance imaging (MRI) was used.
• Analysis included cortical gray matter thickness, volumes of subcortical structures, hippocampal subfields, and brainstem regions.
• Comparison was made between patients with schizophrenia/delusional disorder and mentally healthy subjects.

Main Results:

• Patients exhibited decreased cortical gray matter thickness in multiple regions.
• Reduced volumes were observed in the left thalamus and specific hippocampal subfields.
• No significant alterations were found in brainstem structures.

Conclusions:

• Structural brain abnormalities, particularly in cortical and subcortical regions, are associated with persecutory delusions.
• The findings support a transnosological perspective, suggesting shared neurobiological mechanisms across different delusional disorders.
• Further research is warranted to explore the functional implications of these structural changes.