Brain volume changes in first-episode schizophrenia: a 1-year follow-up study

Area of Science:

• Neuroimaging
• Psychiatry
• Neurology

Background:

• Schizophrenia is associated with brain abnormalities, including reduced gray matter and enlarged ventricles.
• Progressive gray matter loss is observed in chronic and childhood-onset schizophrenia.
• Longitudinal studies of gray matter volume in first-episode schizophrenia are limited.

Purpose of the Study:

• To investigate longitudinal changes in global gray matter volume in first-episode schizophrenia patients.
• To compare brain volume changes between patients and healthy controls.
• To examine the relationship between brain volume changes, clinical outcome, and antipsychotic medication.

Main Methods:

• Magnetic resonance imaging (MRI) scans of 34 first-episode schizophrenia patients and 36 healthy controls were acquired at baseline and after 1 year.
• Repeated-measures analyses of variance were used to compare morphological changes over time.
• Outcome and cumulative antipsychotic dosage were analyzed in relation to brain volume changes.

Main Results:

• Patients showed a significant decrease in total brain volume (-1.2%) and gray matter volume (-2.9%), and a significant increase in lateral ventricle volume (7.7%).
• The reduction in global gray matter volume correlated significantly with clinical outcome.
• Gray matter loss was also independently associated with higher cumulative antipsychotic medication dosage.

Conclusions:

• Gray matter loss in schizophrenia is a progressive process occurring early in the illness.
• Brain volume changes are linked to both the disease process and antipsychotic treatment.
• Findings highlight the importance of early intervention and monitoring treatment effects.