健康人不同生理状态下的脑电近似熵的观测

目的：应用近似熵（ＡｐＥｎ）研究不同生理状态下脑电图非线性动力学特性。方法：在一组健康人４０例中,进行五种生理状态的脑电图记录：闭眼安静;睁眼安静;看图;听短纯音;闭眼数数目１００￣７,并计算各种状态的近似熵。结果：闭眼安静状态额区（Ｆ３,Ｆ４）的ＡｐＥｎ最高,枕区（Ｏ１,Ｏ２）最低,睁眼状态所有脑区的ＡｐＥｎ均增高,不同的生理刺激任务对ＥＥＧ ＡｐＥｎ产生不同的影响,其中额区的影响最大。结论：Ａ

STUDY OF EEG APPROXIMATE ENTROPHY IN DIFFERENT BRAIN FUNCTIONAL STATES

Aim: The approximate entrophy was applied to study EEG in different brain functional states. Methods: EEG were recorded in 40 cases healthy volunteers, who are in five functions states (1. resting conscious with eye close. 2. resting conscious with eye opened. 3. closed eyes and listening pure tone. 4.staring at picture. 5.closed eyes and counting numbers). ApEn were calculated in these EEG. Results: The ApEn of frontal was the highest and ApEn of occipital was the lowest in resting conscious with eye closed. ApEn in every brain area were higher than that in resting conscious with eye opened. ApEn were changed in different physiological functions. Variation of frontal EEG ApEn value were highest. Conclusions: The ApEn may reflect characteristic of EEG non linear dynamical. It is a stable parameter. The dates of its requirement were fewer. It may be a useful parameter in studying EEG time series.