Childhood-onset schizophrenia: progressive brain changes during adolescence

Area of Science:

• Neuroscience
• Developmental Psychology
• Psychiatry

Background:

• Previous studies on childhood onset schizophrenia (COS) indicated progressive brain anomalies, unlike adult schizophrenia.
• Adult schizophrenia studies generally show no ventricular volume progression or correlation with illness duration.
• This study aimed to investigate brain anomaly progression in COS using extended longitudinal data and larger sample sizes, including amygdala and hippocampus measures.

Purpose of the Study:

• To examine the progression of brain structural anomalies in adolescents with childhood onset schizophrenia (COS).
• To compare brain development trajectories between individuals with COS and healthy controls during adolescence.
• To assess changes in cerebrum, lateral ventricles, hippocampus, and amygdala volumes over time.

Main Methods:

• Quantified volumes of the total cerebrum, lateral ventricles, hippocampus, and amygdala from 208 MRI scans of 42 adolescents with COS and 74 controls.
• Utilized a statistical technique combining cross-sectional and longitudinal data to analyze age-related changes.
• Assessed diagnostic group differences in brain structure development during adolescence.

Main Results:

• Individuals with COS exhibited differential nonlinear progression: total cerebrum and hippocampus decreased, while lateral ventricles increased.
• Brain developmental trajectories for these structures reached an asymptote by early adulthood in the COS group.
• No significant age-related changes in these brain structures were observed in the control group.

Conclusions:

• Findings suggest a time-limited period of differential brain development in schizophrenia during adolescence.
• Reconciles discrepancies between childhood and adult schizophrenia brain imaging studies.
• Highlights adolescence as a critical period for understanding brain changes in schizophrenia.