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Prenatal developmental disturbances in the limbic allocortex in schizophrenics.

H Jakob, H Beckmann

Journal of Neural Transmission

|January 1, 1986

Summary

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Neuropathological examination of schizophrenic brains revealed abnormalities in the temporal lobe

Area of Science:

Neuroscience
Neuropathology
Psychiatry

Background:

Schizophrenia is a complex psychiatric disorder with suspected neuropathological underpinnings.
Previous research suggests potential structural brain abnormalities in individuals with schizophrenia.

Observation:

Sixty-four autopsied brains from schizophrenic patients were compared to 10 non-schizophrenic controls.
Abnormalities in the sulcogyral pattern or gross configuration of the temporal lobe were observed in 42 schizophrenic brains.
Specific cytoarchitectonic abnormalities were noted in the rostral entorhinal region and ventral insular cortex.

Findings:

Definite cytoarchitectonic abnormalities were found in the rostral entorhinal region (parahippocampal gyrus) and ventral insular cortex in 20 schizophrenic brains.

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Equivocal cytoarchitectonic changes were present in these regions in 22 additional schizophrenic brains.

Histological analysis revealed poorly developed upper cortical layers and heterotopic neuronal displacement in the entorhinal region, suggesting disrupted neuronal migration.

Implications:

These findings suggest that disruptions in neuronal migration during cortical development may contribute to the neuropathology of schizophrenia.
The observed anatomical abnormalities, particularly in the entorhinal cortex, may underlie cognitive and emotional deficits associated with schizophrenia.
Further research into developmental processes could offer new therapeutic targets for schizophrenia.