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Does dysplasia cause anatomical dysconnectivity in schizophrenia?
E T Bullmore1, P W Woodruff, I C Wright
1Department of Psychological Medicine and Biostatistics, Institute of Psychiatry, De Crespigny Park, London, UK. e.bullmore@iop.bpmf.ac.uk
Schizophrenia Research
|April 29, 1998
Summary
Schizophrenia may stem from abnormal brain development during pregnancy. This study found reduced left-hemisphere connections between frontal and temporal lobes in schizophrenic patients, suggesting developmental dysplasia may cause anatomical dysconnectivity.
Area of Science:
- Neuroscience
- Psychiatry
- Developmental Biology
Background:
- Prenatal brain development anomalies are implicated in schizophrenia pathogenesis.
- Aberrant fetal brain development may lead to altered neural pathway formation.
- These developmental changes might manifest as measurable structural differences in adult brains.
Purpose of the Study:
- To investigate if prenatal-induced brain dysplasia correlates with structural abnormalities in adult schizophrenia.
- To test the hypothesis that abnormal cortical afferentation during fetal development leads to measurable differences in brain imaging data.
Main Methods:
- Magnetic Resonance Imaging (MRI) was used to analyze cortical volume measures.
- Data from 35 male, right-handed patients with schizophrenia and 35 matched controls were compared.
- Analysis focused on global, intra-hemispheric, and inter-hemispheric correlational structures.
Main Results:
- No significant differences were found in global, intra-hemispheric, or inter-hemispheric brain structure between groups.
- Schizophrenia patients exhibited significantly reduced dependencies between left frontal and temporal lobe volumes.
- Reduced dependencies were also observed between left frontal and hippocampal volumes in schizophrenic individuals.
Conclusions:
- The findings suggest that anatomical dysconnectivity, specifically between frontal and temporal cortices, may underlie schizophrenia.
- Prenatal brain dysplasia is proposed as a potential cause for this observed anatomical dysconnectivity.
- This research links early developmental processes to structural brain alterations in schizophrenia.