Age and sex effects in the EEG: development of the normal child
Age and sex effects in the EEG: development of the normal child
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DOI：
10.1016/s1388-2457(01)00488-6
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发表时间：
2001-05-01
影响因子：
4.7
通讯作者：
Selikowitz, M
中科院分区：
文献类型：
--
作者：
Clarke, AR;Barry, RJ;Selikowitz, M
目的：本研究调查了正常儿童脑电图的年龄相关变化和性别差异。方法：40 名男孩和 40 名女孩，年龄在 8 至 12 岁之间，参与了这项研究。在闭眼休息条件下记录脑电图，并进行傅立叶变换，以提供 delta、theta、alpha 和 beta 频段的总功率、绝对和相对功率以及 theta/alpha 和 theta/beta 比率的估计值。结果：绝对 delta 活动随着年龄的增长而减少。随着年龄的增长，相对 delta 和 theta 减少，而 alpha 和 beta 增加。 θ/α 和 θ/β 比值随着年龄的增长而降低。所有这些都表明慢波活动的发育减少。中线和两个半球之间的变化率存在成熟差异。在绝对δ和θ/β比值中，中线和两个半球随着年龄的增长变得更加等势。在贝塔波段，功率增加的速度比两个半球的速度更快。发现了性别差异，男性比女性具有更少的 θ 和更多的 α。结论：这些结果表明，中线的成熟发生得比两个半球更早。与男性相比，女性的脑电图发育也存在滞后。 (C) 2001 Elsevier Science Ireland Ltd. 保留所有权利。
Objectives: This study investigated age-related changes and sex differences in the EEGs of normal children.Methods: Forty boys and 40 girls, between the ages of 8 and 12 years, participated in this study. The EEG was recorded during an eyes-closed resting condition and Fourier transformed to provide estimates for total power, absolute and relative power in the delta, theta, alpha and beta bands, and for theta/alpha and theta/beta ratios.Results: Absolute delta activity decreased with age. Relative delta and theta decreased and alpha and beta increased with increasing age. The theta/alpha and theta/beta ratios decreased with increasing age. All of these indicated a developmental reduction in slow wave activity. Maturational differences were found in the rates of change between the midline and the two hemispheres. In the absolute delta and the theta/beta ratio, the midline and the two hemispheres became more equipotential with age. In the beta band, power increased at a greater rate than in the two hemispheres. Sex differences were found, with males having less theta and more alpha than females.Conclusions: These results indicated that maturation occurs earlier at the midline than in the two hemispheres. Females were also found to have a developmental lag in the EEG compared with males. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.