Sato K, Ono K, Chiba G, Fukata K
Int J Neurosci. 1977;7(4):239-49. doi: 10.3109/00207457709147218.
The higher-order autoregressive (AR) activity of a physiological system (Sato 1975a,b; Sato et al., 1977) was decomposed into first- and second-order activities. The former time-pattern displays a fast rise and an exponential decay, while the latter exhibits a damped sine wave. Application of this component analysis to EEG showed the first-order activity to coincide with the nonoscillatory delta component. The frequency distribution of the natural, damped and resonance frequencies of the second-order activities was found to show one, two or three modes in each frequency range of the delta, theta and beta rhythms in ninety normal adult EEGs. Hence, the second-order activities agree with the oscillatory delta, theta, alpha and beta rhythms. Some changes were induced not only in the frequency of theta and beta rhythms but also in that of alpha rhythm by over-breathing for about three minutes.
生理系统的高阶自回归（AR）活动（佐藤，1975a，b；佐藤等人，1977）被分解为一阶和二阶活动。前者的时间模式显示出快速上升和指数衰减，而后者则呈现出阻尼正弦波。将这种成分分析应用于脑电图显示，一阶活动与非振荡性δ成分一致。在90例正常成人脑电图的δ、θ和β节律的每个频率范围内，发现二阶活动的自然频率、阻尼频率和共振频率的分布显示出一、二或三种模式。因此，二阶活动与振荡性δ、θ、α和β节律一致。过度呼吸约三分钟不仅会引起θ和β节律频率的变化，还会引起α节律频率的变化。
