Han D X, Zhou C D, Liu Y H
Institute of Space Medico-Engineering, Beijing, China.
Space Med Med Eng (Beijing). 2000 Oct;13(5):336-40.
Objective. To establish method in analysing EEG complexity as related to brain function state (Cs) and to examine Cs under conditions of taking rest and doing mental arithmetic, to explore their regular changes. Method. EEG of 10 male subjects aged 26-30 under the conditions of taking rest and doing mental arithmetic were recorded. Cs under the two conditions and their changes related to brain function states were analyzed with a special software for Cs analysis. Result. EEG Cs under mental arithmetic changed significantly. According to these changes, the subjects were divided into two groups: Group A, 8 subjects, their EEG Cs under mental arithmetic were significantly higher than Cs under rest at all electrode sites. The most outstanding areas were temporal region and parieto-occipital region. Group B, 2 subjects, their EEG Cs under mental arithmetic were significantly lower than Cs under rest. The most outstanding areas were prefrontal region and temporal region. Conclusion. The result showed that high correlation existed between mental arithmetic and Cs. This method of analysis was useful in studying brain cognitive activities and assessing mental workload.
目的。建立分析脑电图复杂性与脑功能状态（Cs）相关的方法，并在休息和进行心算的条件下检查Cs，探索其规律变化。方法。记录10名年龄在26 - 30岁男性受试者在休息和进行心算条件下的脑电图。使用专门的Cs分析软件分析两种条件下的Cs及其与脑功能状态的变化。结果。心算时脑电图Cs有显著变化。根据这些变化，受试者被分为两组：A组，8名受试者，他们在心算时所有电极部位的脑电图Cs显著高于休息时。最突出的区域是颞区和顶枕区。B组，2名受试者，他们在心算时的脑电图Cs显著低于休息时。最突出的区域是前额叶区和颞区。结论。结果表明心算与Cs之间存在高度相关性。这种分析方法有助于研究脑认知活动和评估心理负荷。
