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随着电子计算机技术的发展,Fourier转换用于脑电图的分析,得到了脑电功率谱,从而使脑电活动的研究能定量化、客观化,但尚缺乏直观和形象。Walter及Shipton于1951年首次试图将脑电活动以地形图的方式表达。经过Gotaman(1975)、Harner(1978)、Duffy(1979)Dubinsky(1980)、Nagata(1982)等人的一系列研究,得出了脑电功率谱的地形图(Computed Mapping of EEG,CME或Brain Electric Activity Mapping,BEAM)。基本原理脑电功率谱及其地形图的基本程序分3部分。(一)信号获得系统:①脑电信号由头皮电极引
With the development of electronic computer technology, Fourier transform is used in the analysis of EEG, and the EEG power spectrum is obtained, so that the study of EEG activity can be quantified and objectified, but it lacks intuition and image. For the first time in 1951, Walter and Shipton attempted to map brain electrical activity in a topographical map. A series of studies of Gotaman (1975), Harner (1978), Duffy (1979) Dubinsky (1980) and Nagata (1982) have resulted in Computed Mapping of EEG (CME) or Brain Electric Activity Mapping, BEAM). Basic principle EEG power spectrum and its topographic map of the basic procedures divided into 3 parts. (A) signal acquisition system: ① EEG signals from the scalp electrode