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Brain structural changes in schizoaffective disorder compared to schizophrenia and bipolar disorder
B L Amann1,2, E J Canales-Rodríguez1,2, M Madre1,3
1FIDMAG Research Foundation Germanes Hospitalàries, Barcelona, Spain.
Acta Psychiatrica Scandinavica
|May 14, 2015
Summary
Structural brain abnormalities in schizoaffective disorder more closely resemble schizophrenia than bipolar disorder. This study used voxel-based morphometry to compare gray matter volume reductions in these patient groups and healthy controls.
Area of Science:
- Neuroimaging
- Psychiatric Disorders
- Brain Anatomy
Background:
- Schizoaffective disorder shares features of both schizophrenia and bipolar disorder, leading to questions about its underlying neurobiology.
- Previous research on structural brain changes in schizoaffective disorder is limited, particularly in comparison to schizophrenia and bipolar disorder.
Purpose of the Study:
- To investigate and compare brain structural changes in patients with schizoaffective disorder, schizophrenia, and bipolar disorder.
- To determine whether schizoaffective disorder's brain abnormalities are more similar to schizophrenia or bipolar disorder.
Main Methods:
- Voxel-based morphometry (VBM) was used to analyze brain gray matter volume.
- Forty-five patients with schizoaffective disorder, 45 with schizophrenia, 45 with bipolar disorder, and 45 healthy controls participated.
Main Results:
- Patients with schizoaffective disorder and schizophrenia exhibited widespread, overlapping gray matter volume reductions compared to controls.
- Patients with bipolar disorder did not show these widespread reductions.
- No significant differences in volume reduction were found between schizoaffective disorder and schizophrenia patients in key areas, while bipolar disorder patients showed smaller volumes in some regions.
Conclusions:
- Structural gray matter abnormalities in schizoaffective disorder are more akin to those observed in schizophrenia.
- These findings suggest a closer neurobiological link between schizoaffective disorder and schizophrenia than with bipolar disorder.
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