As quantitative neuroimaging continues to elucidate the gross neuropathology of schizophrenia, neurochemical and histological studies have contributed to defining this pathology in terms of neurotransmitter dysfunction. Increasingly, there is evidence implicating neurons containing the major inhibitory neurotransmitter of the brain--gamma-aminobutyric acid (GABA). Benes was the first to demonstrate deficits in some morphological subtypes of interneurons in the frontal cortex in schizophrenia.
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