Yordanova J, Kolev V
Institute of Physiology, Bulgarian Academy of Sciences, Sofia, Bulgaria.
Electroencephalogr Clin Neurophysiol. 1997 Sep;104(5):418-30. doi: 10.1016/s0168-5597(97)00054-3.
Event-related potentials (ERPs) from 50 children (6-11 years) and 10 adults were elicited by auditory passive, and by rare target and frequent non-target stimuli, and analyzed in the time and frequency domains. The latency of the maximal theta response (or the theta frequency component of the ERP) was evaluated with respect to age and scalp topography effects. The major findings were: (1) The latency of the maximal theta response decreased with increasing age in children, although for each stimulus type and location adults had shorter latencies than the children. (2) The developmental time course of latency reduction depended on the electrode location, with the most prominent reduction occurring at 8 years at Cz, and no differences between children groups obtained for the frontal site. (3) Maximal theta response latency was strongly associated with the latency of the late parietal P400-700 (P3b) component in children. The results suggest that the developmental latency decrease in P300 processes originate from a decrease in the preceding theta-related processes and may reflect a speeding of cognitive stimulus evaluation.
对50名儿童（6至11岁）和10名成年人进行听觉被动刺激，并通过罕见目标刺激和频繁非目标刺激诱发事件相关电位（ERP），并在时域和频域进行分析。针对年龄和头皮地形图效应评估最大θ反应（或ERP的θ频率成分）的潜伏期。主要研究结果如下：（1）儿童中最大θ反应的潜伏期随年龄增长而缩短，尽管对于每种刺激类型和位置，成年人的潜伏期都比儿童短。（2）潜伏期缩短的发育时间进程取决于电极位置，在Cz电极处8岁时缩短最为明显，而额叶部位的儿童组之间没有差异。（3）儿童中最大θ反应潜伏期与顶叶晚期P400 - 700（P3b）成分的潜伏期密切相关。结果表明，P300过程中发育性潜伏期缩短源于先前与θ相关过程的减少，可能反映了认知刺激评估速度的加快。
