Corpus callosum development in childhood-onset schizophrenia

Area of Science:

• Neuroscience
• Developmental Psychology
• Psychiatry

Background:

• Schizophrenia is associated with corpus callosum (CC) abnormalities and altered interhemispheric communication.
• Childhood-onset schizophrenia (COS) represents a severe, continuous form of the disorder.
• Previous research indicates CC size differences between schizophrenia patients and controls.

Purpose of the Study:

• To examine corpus callosum area in childhood-onset schizophrenia (COS) at initial presentation and prospectively through adolescence.
• To investigate developmental trajectories of CC subregions in COS.
• To correlate CC development with other abnormalities in COS.

Main Methods:

• Acquired 113 MRI scans from 55 COS patients and 110 scans from 56 age/gender-matched healthy volunteers (ages 8-24).
• Obtained baseline and follow-up scans at ~2-year intervals.
• Calculated midsagittal areas of the total CC and seven subregions using automated software; analyzed data with mixed-effects models.

Main Results:

• No initial diagnostic differences in CC area were observed.
• Longitudinally, COS patients exhibited a different developmental trajectory for the splenium compared to controls.
• The splenial area significantly decreased in COS patients starting around age 22, even after adjusting for total brain volume.

Conclusions:

• Patients with schizophrenia demonstrate a divergent developmental trajectory for the splenial area, showing a decline in COS.
• This finding may suggest anticipated late-onset occipital and extrastriate alterations in brain regions affected by schizophrenia.
• Further replication is needed to confirm these developmental changes.