基于脑电信号时空分布信息的思维特征研究

Spatio-Temporal Distribution of EEG Signals Analysis to Study Mental Character

通过对几种特定形式的思维状态下 ,脑电信号不同频段能量的时空分布的计算和分析 ,发现了思维状态对脑电信号的能量分布影响具有不对称性。同时利用这种脑电信号能量的时空分布信息对思维状态进行神经网络分类 ,并对去除眼动等干扰信号前后的分类结果进行比较。结果表明 ,这种时空分布信息能有效的表征思维状态的类型 ,并对干扰信号具有一定的抑制作用 。

The research is focus on the relationship between mental states and EEG. Spatio temporal distribution of EEG's energy is calculated and analyzed, the asymmetry of this distribution is found under the different mental states. When using this distribution information for classifying mental state through neuro network,the classification is satisfaction. The result shows that the spatio-temporal distribution of EEG signals can availably express mental states ,it is also robust to noise disturbance. The method is a effective way to study the relationship between the EEG and Cognition.