State-dependent changes in intrahemispheric EEG coherence for patients with acute exacerbation of schizophrenia
作者： Masato Higashima , Tsutomu Takeda , Mitsuru Kikuchi , Tatsuya Nagasawa , Naohisa Hirao
DOI: 10.1016/J.PSYCHRES.2005.05.020
关键词:
摘要: Abnormalities of electroencephalographic (EEG) coherence in schizophrenia are thought to reflect functional disconnections between different brain regions associated with the onset this disease. To clarify whether these abnormalities change a symptom-dependent manner individual patients, we analyzed resting EEGs recorded at two time points 36.6-day interval during course treatment for 14 patients who had been hospitalized acute exacerbation schizophrenia. Symptom severity was quantitatively measured by means Brief Psychiatric Rating Scale (BPRS). Beta (13-20 Hz) left frontal (F7)-temporal (T5) electrode pair less than that corresponding right (F8-T6) initial test. At second test, when symptoms improved, frontal-temporal beta increased, resulting disappearance laterality. This correlated negatively total BPRS score, particularly positive symptom score. Similar correlations were found eight drug-free first examination. These results suggest disconnection and temporal lobe hemisphere may be generation psychotic
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