정신분열병 환자에서 세가지 청각 자극 "Oddball" 모형에 의한 사건관련전위 P3a와 P3b
Event-Related Potential P3a and P3b using 3-Stimulus Auditory "Oddball" Paradigm in the Patients with Schizophrenia
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Abstract
Objectives:Using 3-stimulus auditory “oddball” paradigm reflecting fronto/central and temporo/parietal functions simultaneously, we examined patients with schizophrenia. Methods:Fifteen patients with schizophrenia from outpatient clinic and fifteen normal controls from hospital staffs were recruited for the study. To elicit P3a and P3b, 3-stimulus auditory oddball paradigm was employed. The 3-stimulus auditory oddball paradigm was composed of standard tone (1,000 Hz, 75 dB, 80%), target tone (2,000 Hz, 75 dB, 10%) and distracter(White noise, 95 dB, 10%). Results:P3a and P3b were prominent in fronto/central and temporo/parietal areas, respectively, in both schizophrenics and normal controls. The P300 amplitude in patients with schizophrenia was reduced across P3a and P3b (p<0.01). The P300 latency in patients with schizophrenia was delayed across P3a and P3b (p<0.01). Conclusion:These results were consistent with frontal and temporo-parietal lobe dysfunctions in schizophrenics. The 3-stimulus auditory paradigm could be applied for patients with schizophrenia and useful for further exploration the disorder.
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