Otero G A
Faculty of chemistry, Paseo Colón y Paseo Tollocan, University of the State of Mexico, Toluca, Mexico.
Electroencephalogr Clin Neurophysiol. 1997 Jun;102(6):512-6. doi: 10.1016/s0013-4694(97)95213-9.
Forty-two children, who had been studied previously at the age of 18-30 months, were studied again at 4 years of age. Twenty-two belonged to low socioeconomic strata and were classified as high-risk children (HRC) the other 20 were classified as low-risk children (LRC), and belonged to middle and middle-high socioeconomic strata. Ten minutes of EEG using reference derivations (with linked earlobes) were recorded from each subject. Twenty EEG segments of 3.2 s each were selected by visual inspection for Fourier analysis. Absolute power (AP) was computed for the total EEG energy (1.5-19 Hz) as well as each reference derivation in 4 frequency bands: delta (1.5-3.5 Hz), theta (4-7.5 Hz), alpha (7.5-12.5 Hz) and beta (12.5-19 Hz). HRC had significantly more delta AP than LRC in frontal and central leads, and higher values of theta AP in frontal leads. Alpha AP was higher in LRC in occipital areas and in F8 and T4. This study suggests a maturational lag in HRC.
42名儿童，他们曾在18至30个月龄时接受过研究，4岁时再次接受研究。其中22名儿童属于社会经济地位较低的阶层，被归类为高危儿童（HRC），另外20名儿童被归类为低危儿童（LRC），属于中高社会经济阶层。对每个受试者记录了10分钟使用参考导联（双侧耳垂相连）的脑电图。通过目视检查从每个受试者中选择20个时长为3.2秒的脑电图片段进行傅里叶分析。计算了总脑电图能量（1.5 - 19 Hz）以及4个频段（δ波（1.5 - 3.5 Hz）、θ波（4 - 7.5 Hz）、α波（7.5 - 12.5 Hz）和β波（12.5 - 19 Hz））中每个参考导联的绝对功率（AP）。高危儿童在额叶和中央导联的δ波绝对功率显著高于低危儿童，在额叶导联的θ波绝对功率值更高。低危儿童在枕叶区域以及F8和T4导联的α波绝对功率更高。这项研究表明高危儿童存在成熟滞后。
