思维脑电信号的关联维数分析  

Correlation Dimension Analysis on Electroencephalogram Signal Evoked by Mental Tasks

作　　者：蔡超峰[1] 张勇[1] 郭舒婷[1] 姜利英[1] 

机构地区：[1]郑州轻工业学院电气信息工程学院,河南郑州450002

出　　处：《河南科技大学学报（自然科学版）》2012年第1期37-40,6,共4页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(61002007);郑州轻工业学院博士科研基金项目

摘　　要：采用G-P算法计算了5种不同心理作业下的思维脑电信号的关联维数。计算结果表明:对同一个电极上的脑电数据而言,心算乘法和想象几何图形旋转这两种心理作业下平均关联维数的值比较大。这说明当大脑进行心算乘法和想象几何图形旋转时,大脑皮层神经元的活动加剧,导致脑电信号变的复杂。此外,每种心理实验作业下电极01、02处脑电信号关联维数值均较大,表明枕区皮层神经元相对于大脑皮层其他部位的神经元始终处于比较活跃的状态。The G-P algorithm was employed to calculate the correlation dimension of the electroencephalogram (EEG) signal recorded at five different mental tasks.For the EEG signal derived from the same electrode,the computation results indicate that the value of average correlation dimension is always large when the math task and geometric figure rotation task are implemented,which implies that the activities of the brain neurons increase this moment.For the same mental task,the EEG signals recorded at electrode 01 and 02(occipital region ) always have larger average correlation,which reveals that the brain neurons of occipital region are more active.

关 键 词：脑电 关联维数 相空间重构 思维作业 

分 类 号：R318.04[医药卫生—生物医学工程]