전산화 뇌파기 개발연구

• 영문명: Development of a Computerized EEG with a Personal Computer
• 발행기관: 대한신경정신의학회
• 저자명: 이성훈 고한우 유선국 김원기 이홍식 이호영
• 간행물 정보: 『신경정신의학』제27권 제5호, 909~916쪽, 전체 8쪽
• 주제분류: 의약학 > 정신과학
• 파일형태: PDF
• 발행일자: 1988.09.30

영문 초록

The authors developed a computerized electroencephalography with a IBM PC AT. EEG signals amplified with 16 channels (Nihon Kohden EEG-4313 F) were acquired through a DTX 2806 and a DTX 311 (Data Translation) into a computer. EEG activity was digitized at 102.4 Hz(1024 samples per epoch). Shifted DC potentials and 60 Hz artifact were removed by high pass filter and 60 Hz notch filter. A window function consisting of a 10% cosine taper was obtained by weighing the points at either end of the epoch by a cosine bell. A fast Fourier transform was applied to every epoch and the power spectrum estimates computer at 0.39 Hz steps. For smoothing, adjacent estimates were summed to yield 1-Hz resolution, with the final estimates expressed as magnitude values in microvolts(square root of power). The activity estimates for the delta, theta, alpha and beta bands were computed by summing adjacent values * delta 0.7-4.3，theta 4.7-7.8, alpha 8.2-12.9，betal 13.9-19.9, beta2 20.3-31.6. The function of the system was tested using with 10 Hz sine wave from a functional generator and a human EEG.

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