阵发性40Hz脑电信号提取方法的研究

用频域门限提取法与神经网络模式识别相结合的方法实现阵发性40Hz EEG的有效检测,对10多位受试者的阵发性40Hz EEG进行了提取,计算了平均峰值功率,分析了各受试者所表现的思维状态,结果表明,提出的检测方法是切实可行的,并支持了D.E.Sheer的理论。

A Study on the Method of Extraction for 40 Hz EEG Bursts

The bursts of 40 Hz EEG are a reliable indicator of the "focused arousal". It has an active significance in diagnosis of cognitive dysfunction. But, the bursts of 40 Hz EEG are seriously interfered by the high amplitude broad-band EMG signals from the scalp. It causes the difficulty of detection. This paper gives a new method of the combination of threshold extraction in frequency domain and neural network pattern recognition to realize the effective detection of 40 Hz EEG bursts, and reports the mean peak power of the 40 Hz EEG bursts for 11 subjects and analyses their thinking states. The results indicate that the method given in this paper can be used feasibly and support the theory given by D. E. Sheer.