Abstract
The relationship of behavior to left or right cerebral hemisphere function has been of considerable interest recently. Due to our recent findings that various EEG frequencies were abnormally prominent over the left hemisphere in some schizophrenic patients, it appeared logical to examine the relationship of EEG and AER asymmetries to schizophrenic symptoms, presumed to be related to left or right cerebral functioning. Thirty male schizophrenic patients were rated on the BPRS for symptoms that were deemed to be so related. Eight patients had “left” related symptoms (mainly thought disorder) and six had only “right” hemisphere symptoms (mainly anxiety-depression). Subjects were recorded for ongoing resting EEG and visual (flash) averaged evoked response asymmetries. Those with “left” symptoms showed significant asymmetries in the beta II band, with left hemisphere amplitude values being highest. Patients with “right” symptoms showed evoked response asymmetries, with the right hemisphere amplitude values being the highest. It appears, thus, that different schizophrenic symtomatologies are characterized by different electrophysiological patterns.
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