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在目前定量脑电图的研究中，α频段只划分为α１（８～９．９Ｈｚ）和α２（１０～１２．９Ｈｚ），难以显示α带变慢。我们用α频段新的划分法，即分为α１（８～８．９Ｈｚ）、α２（９～９．９Ｈｚ）和α３（１０～１２．９Ｈｚ），研究了１１５例健康成人α频段的定量脑电图，并用２４４例病人的显著概率图作对照。其结果在健康成人，α２、α３头前部（额、前颞）明显低于头后部（Ｐ＜０．００１），而α１（８～８．９Ｈｚ）以及β、θ、δ各频段则头前后部差别不明显（Ｐ＞０．０５）。因而认为α频段须划分为α１、α２和α３才合符临床实际。
In the current quantitative EEG studies, the alpha frequency band is divided into alpha 1 (8-9.9 Hz) and alpha 2 (10-12.9 Hz), making it difficult to show that the alpha band is slowed down. We used a new classification of α-band, which was divided into α1 (8 ~ 8.9Hz), α2 (9 ~ 9.9Hz) and α3 (10 ~ 12.9Hz) The electrogram was compared with a significant probability plot of 244 patients. The results in healthy adults, α2, α3 anterior head (forehead, temporal) was significantly lower than the head (P <0.001), and α1 (8 ~ 8.9Hz) and β, θ, δ of the band There was no significant difference between the anterior and posterior parts of the head (P> 0.05). Therefore, it is considered that the α frequency band should be divided into α1, α2 and α3 in line with clinical practice.