Ogawa T, Sonoda H, Suzuki M, Ishiwa S, Goto K, Sawaguchi H, Wakayama K
No To Hattatsu. 1989 Sep;21(5):417-23.
The records of waking state electroencephalography (EEG) of 1,340 normal children aged from 3 to 12 years were subjected to analysis using an autoregressive model. The results were summarized as follows. (1) 6,814 components of second-order activities were obtained through component analysis of the 1,218 EEG records. The frequency polygons of damping frequency of the second-order component waves verified several modes, each of which was enhanced in the eight frequency ranges. (2) The average percent-power of the alpha-1 waves decreased with increasing ages from 3 years, whereas that of the alpha-2 waves increased. That of the alpha-3 waves showed no change with ages. (3) The average damping times of alpha-2 waves increased with increasing ages. (4) Dominancy in frequency showed a course of two step increments at 3-6 and 10 years of age. The former was chiefly due to the increase in the alpha-1 wave and the latter in the alpha-2 wave. There were no significant increases of alpha-3 waves. (5) By means of EEG pattern discrimination, the differences in alpha components among different age groups were obtained as generalized (Maharanobis') distances. The alpha-1 activity showed a significant difference in amount between the age group of 3-6 years and the other age groups. The alpha-2 activity showed a significant difference in amount between the age group of 10 years and the other age groups. (6) The development of brain activity proceeds faster in the posterior areas and relatively slower in the central areas.
对1340名3至12岁正常儿童的清醒状态脑电图（EEG）记录采用自回归模型进行分析。结果总结如下：（1）通过对1218份EEG记录进行成分分析，获得了6814个二阶活动成分。二阶成分波阻尼频率的频率多边形证实了几种模式，每种模式在八个频率范围内增强。（2）α-1波的平均功率百分比从3岁起随年龄增长而降低，而α-2波的平均功率百分比则增加。α-3波的平均功率百分比随年龄无变化。（3）α-2波的平均阻尼时间随年龄增长而增加。（4）频率优势在3至6岁和10岁时呈现两步增长过程。前者主要是由于α-1波增加，后者是由于α-2波增加。α-3波无显著增加。（5）通过EEG模式判别，不同年龄组之间α成分的差异以广义（马氏）距离表示。α-1活动在3至6岁年龄组与其他年龄组之间的量上存在显著差异。α-2活动在10岁年龄组与其他年龄组之间的量上存在显著差异。（6）脑活动的发展在后部区域较快，在中部区域相对较慢。
