【摘要】 本文用非参数分析思想,根据40Hz脑电信号(EEG)和宽带干扰肌电信号(EMG)的特点建立了40Hz EEG检测与分析的系统,它包括:1)数字滤波;2)基线下阀值的自动确定;3)40Hz EEG的检测分析。在Apple—Ⅱ机上通过了所有的程序,进行了初步实验。对四个受试者在基线和口语条件下的40HzEEG进行了检测与分析,结果表明:40HzEEG能反映大脑认识功能有无障碍的情况,可作为“集中警觉”状态下的可靠标志。更多还原

【Abstract】 A system for detection and analysis of 40Hz EEG activity has been studied by nonparametrie analysis method based on the character of short aperiodic bursts in a narrow-band 40Hz EEG activity and broad-band EMG activity from the scalp muscles. It consists of digital filter, automatic decision of the threshold during baseline periods, and detection and processing of the 40Hz EEG. All programs are accomplished on the Apple-Ⅱ. The 40Hz EEG activity of four subjects during baseline and verbal periodsare detected and analysed. The results indicate that the 40Hz EEG can reflect the condition of cognitive function (cognitive dysfunetion exists or not), and it can be a reliable indicator of the state of the "focused arousal"更多还原