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Progressive decrease of left superior temporal gyrus gray matter volume in patients with first-episode schizophrenia.

Kiyoto Kasai1, Martha E Shenton, Dean F Salisbury

  • 1Clinical Neuroscience Division, Department of Psychiatry, Boston VA Healthcare System, Brockton Division, Harvard Medical School, Brockton, MA 02301, USA.

The American Journal of Psychiatry
|December 31, 2002
PubMed
Summary

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This summary is machine-generated.

Patients with first-episode schizophrenia experience progressive gray matter volume loss in the left superior temporal gyrus. This finding was not observed in patients with affective psychosis, highlighting a key difference in neuroprogression.

Area of Science:

  • Neuroimaging
  • Psychiatry
  • Neuroscience

Background:

  • Previous magnetic resonance imaging (MRI) studies indicate smaller temporal lobe gray matter volumes in schizophrenia.
  • It is unclear if these volume reductions progress over time in first-episode schizophrenia or affective psychosis.

Purpose of the Study:

  • To investigate progressive temporal lobe gray matter volume changes in first-episode schizophrenia.
  • To compare these changes with those in first-episode affective psychosis and healthy controls.

Main Methods:

  • High-spatial-resolution MRI scans were acquired at baseline and 1.5 years later.
  • Participants included 13 first-episode schizophrenia patients, 15 first-episode affective psychosis patients, and 14 healthy controls.
  • Gray matter volumes of the superior temporal gyrus and amygdala-hippocampal complex were calculated.

Related Experiment Videos

Main Results:

  • First-episode schizophrenia patients showed significant gray matter volume decreases in the left superior temporal gyrus over time.
  • This progressive reduction was more pronounced in the posterior left superior temporal gyrus (9.6%) than anteriorly (8.4%).
  • No significant group differences in the rate of change were found in other brain regions.

Conclusions:

  • Progressive gray matter volume reduction in the left posterior superior temporal gyrus is characteristic of first-episode schizophrenia.
  • This neuroprogressive pattern was not observed in first-episode affective psychosis patients.