Related Experiment Videos
White matter abnormalities in first-episode schizophrenia or schizoaffective disorder: a diffusion tensor imaging
Philip R Szeszko1, Babak A Ardekani, Manzar Ashtari
1The Zucker Hillside Hospital, Department of Psychiatry Research, 75-59 263rd St., Glen Oaks, NY 11004, USA. szeszko@lij.edu
The American Journal of Psychiatry
|March 3, 2005
Summary
Early-onset schizophrenia patients show white matter abnormalities, specifically reduced fractional anisotropy in key brain regions. These diffusion tensor imaging findings suggest early frontotemporal dysfunction in schizophrenia.
Area of Science:
- Neuroimaging
- Psychiatric Disorders
- White Matter Integrity
Background:
- Schizophrenia and schizoaffective disorder are complex psychiatric conditions.
- Previous research indicates white matter abnormalities in chronic schizophrenia patients.
Purpose of the Study:
- To investigate early white matter abnormalities in first-episode schizophrenia and schizoaffective disorder patients.
- Utilize diffusion tensor imaging (DTI) to assess brain structure near illness onset.
Main Methods:
- Diffusion tensor imaging (DTI) and structural MRI were performed on 10 patients and 13 healthy controls.
- Voxel-wise analysis compared fractional anisotropy (FA) maps between groups.
- Intersubject registration to Talairach space ensured accurate anatomical comparison.
Main Results:
- Patients exhibited significantly lower fractional anisotropy (FA) in the left internal capsule.
- Reduced FA was also observed in the left-hemisphere white matter of the middle frontal and posterior superior temporal gyri.
- No regions showed significantly higher FA in patients compared to controls.
Conclusions:
- White matter pathology is present early in schizophrenia and schizoaffective disorder.
- Observed abnormalities may be less severe than in chronic illness stages.
- Findings support theories of frontotemporal dysfunction and impaired left-hemisphere lateralization in schizophrenia.