Oohashi Tsutomu, Kawai Norie, Honda Manabu, Nakamura Satoshi, Morimoto Masako, Nishina Emi, Maekawa Tadao
Department of Information and Network Science, Chiba Institute of Technology, 275-0016, Narashino, Japan.
Clin Neurophysiol. 2002 Mar;113(3):435-45. doi: 10.1016/s1388-2457(02)00002-0.
To verify the utility of a portable electroencephalogram (EEG) measurement system developed for investigating spontaneous EEG from vigorously moving healthy subjects in a possession trance under a natural condition.
A portable multi-channel EEG telemetry system was developed to record the EEGs of 3 healthy male Balinese while they were performing a ritual dedicatory drama in the field. After reducing extraneous artifacts using a digital filter, the EEGs and their power spectra were analyzed in terms of evolution from one state to another.
During the drama, one of the subjects became possessed while the others did not. The EEG of the possessed subject did not show any pathological findings including epileptic discharges, but indicated enhanced power in the theta and alpha frequency bands during the trance. This finding was not observed in the other two subjects, who did not go into trances, with no pathological EEG findings.
The measurement system and data analysis methods we developed have allowed us, for the first time, to obtain an EEG from healthy subjects who are vigorously moving while in a possession trance. The present technique enables us to use a spontaneous EEG as a marker of the underlying physiology of a state of possession trance.
验证一种便携式脑电图（EEG）测量系统的实用性，该系统是为在自然条件下调查处于附体恍惚状态下剧烈运动的健康受试者的自发脑电图而开发的。
开发了一种便携式多通道EEG遥测系统，用于记录3名健康的巴厘岛男性在野外表演仪式奉献剧时的脑电图。在使用数字滤波器减少无关伪迹后，根据从一种状态到另一种状态的演变分析脑电图及其功率谱。
在戏剧表演期间，其中一名受试者被附体，而其他受试者没有。被附体受试者的脑电图未显示任何病理结果，包括癫痫放电，但在恍惚期间θ和α频段的功率增强。在另外两名未进入恍惚状态且脑电图无病理结果的受试者中未观察到这一发现。
我们开发的测量系统和数据分析方法首次使我们能够从处于附体恍惚状态下剧烈运动的健康受试者中获得脑电图。目前的技术使我们能够将自发脑电图用作附体恍惚状态潜在生理状态的标志物。
