Computed tomographic brain studies and treatment response in schizophrenia

Area of Science:

• Neuroimaging
• Psychiatry
• Schizophrenia Research

Background:

• Ventricular enlargement in schizophrenia has been observed since 1927.
• CT scans reveal enlarged ventricles in 50% of chronic and 20% of acute schizophrenics.
• Other reported abnormalities include widened sulci, cerebellar atrophy, and altered hemispheric asymmetry.

Purpose of the Study:

• To review the literature on ventricular enlargement in schizophrenia.
• To explore the relationship between ventricular enlargement and treatment response.
• To investigate potential etiological factors and neurobiological correlates.

Main Methods:

• Literature review of studies using CT scans and other neuroimaging techniques.
• Analysis of findings related to ventricular size, psychosis onset, illness progression, and treatment outcomes.
• Examination of twin studies and neurochemical correlates (dopamine, serotonin, noradrenaline).

Main Results:

• Ventricular enlargement may precede psychosis and progress during the illness course.
• Genetic vulnerability and environmental factors may contribute to ventricular enlargement.
• Enlargement is associated with dopamine system disturbances and potential serotonin/noradrenaline cell loss.
• A correlation exists between enlarged ventricles and poor response to neuroleptic medication.
• Patients with very large ventricles may exhibit increased sensitivity to neuroleptic side effects.

Conclusions:

• Ventricular enlargement is a significant finding in schizophrenia, potentially indicating a distinct subtype or disease process.
• The association with poor treatment response warrants further investigation.
• Long-term prospective studies are needed to clarify the role of CT scans in predicting treatment outcomes and to understand the etiological underpinnings.