Somsen R J, van't Klooster B J, van der Molen M W, van Leeuwen H M, Licht R
Department of Developmental Psychology, University of Amsterdam, The Netherlands.
Biol Psychol. 1997 Jan 31;44(3):187-209. doi: 10.1016/s0301-0511(96)05218-0.
Developmental changes in background EEG power spectra were examined in 5-12-year-old children. The results confirmed older and more recent studies that reported continuous maturation and more sudden growth spurts in power spectral amplitude. EEG power in the Delta and Theta frequency bands decreased gradually with age, while power in the Alpha and Beta bands changed very little. Changes in spectral power were relatively increased between 6 and 7 years and between 9, 10 and 11 years. Some methodological problems concerning the assessment of cross-sectional age changes in EEG power spectra were addressed. Peak frequency increased with age; between 5 and 12 years the peak in the power spectrum shifted from fast Theta via slow Alpha to fast Alpha. Transformation of absolute power into relative power produced a high degree of interdependency between the broad bands. This interdependency affected the change with age of relative Alpha. Absolute power Alpha only changed in the eldest children, but because of a substantial decrease in Delta and Theta with increasing age, the proportion of Alpha relative to the other three bands increased. Hence, relative Alpha provided a good indication of the general maturational trend.
对5至12岁儿童的脑电图背景功率谱的发育变化进行了研究。结果证实了早期和近期的研究，这些研究报告了功率谱振幅的持续成熟和更突然的增长高峰。δ波和θ波频段的脑电图功率随年龄逐渐降低，而α波和β波频段的功率变化很小。频谱功率的变化在6至7岁之间以及9、10和11岁之间相对增加。讨论了一些关于脑电图功率谱横断面年龄变化评估的方法学问题。峰值频率随年龄增加；在5至12岁之间，功率谱的峰值从快速θ波经慢速α波转变为快速α波。将绝对功率转换为相对功率在宽带之间产生了高度的相互依赖性。这种相互依赖性影响了相对α波随年龄的变化。绝对功率α波仅在年龄最大的儿童中发生变化，但由于随着年龄增长δ波和θ波大幅下降，α波相对于其他三个频段的比例增加。因此，相对α波很好地反映了总体成熟趋势。
