對8個被試在視聽覺同步刺激模式下采集的腦電數(shù)據(jù)，選擇O1電極探討刺激前后，從自發(fā)腦電到誘發(fā)腦電過程中α波(8～13 Hz)相位重排現(xiàn)象。計算每次刺激前的幅度(Pr)、相位(φ)，和刺激后的第一個正(P)波和第一個負(fù)(N)波的潛伏期與幅度共6個參數(shù)。提出了Pr和P、N波幅度之間的3次多項式模型；采用線性回歸中異常值檢驗法量化相位重排的程度，結(jié)果表明：從自發(fā)腦電到誘發(fā)腦電的過程中，α波的相位存在明顯的重排現(xiàn)象。

The phase resetting from pre-stimulus to post-stimulus alpha wave (8~13 Hz) in eight healthy subjects is studied. The six parameters of single trail alpha wave are computed and analyzed: pre-stimulus amplitude and phase angle, post-stimulus amplitude and latency of first positive and negative peak. The amplitude relationship between pre- and two post-stimuli can be described by a cubic polynomial model. By using the method of outlying cases test in linear regression, we can quantitatively analyze the degree of phase resetting. The results demonstrate that there is partial phase resetting from pre- to post-stimuli in the band of alpha wave.