中国临床心理学杂志

正常儿童汉字语义事件相关电位的研究

单位：1. 苏州大学附属第二医院江苏苏州 215004
2. 常州市第一人民医院江苏常州 213003

关键词：汉字语义儿童事件相关电位

分类号：R395.9

出版年,卷(期):页码：2006,14(1):103-105

摘要：

目的：探讨单个汉字语义刺激正常儿童的事件相关电位，对三种不同类别(有关联、无关联、假字)ERP的特征进行比较研究。方法：对31名10岁的儿童采用加拿大Stellatesystems32道数字化无纸脑电图仪，并用单个汉字语义刺激模块进行检测。刺激信号同步触发，脑电图(EEG)同步记录，从EEG中提取三种不同类别刺激的ERP，对P2和N2进行分析。结果：单个汉字语义有关联的P2及N2潜伏期与无关联，假字组相比有显著性差异(P＜0.01)；波幅无显著性差异(P＞0.05)；N2波广泛分布头皮各区，左右大脑半球无明显差异(P＞0.05)。结论：三种不同类别的ERP波形及潜伏期各不相同；N2是语义刺激ERP的主成分，P2可认为与儿童语义的早期理解有关。

Objective: To study the feature of event-related potential waveforms elicited by single Chinese Character semantic stimulus in normal children, compare and investigate the character of different types of event-related potentials.Methods: 31 10-year-old healthy children were examined with Canadian Stellate Systems 32 Channels Digital EEG and three lists of single Chinese Character semantic stimulus(related, non-related, pseudowords), While the stimulus information is shown to participants, EEG is recorded simultaneously.ERPs of three different stimuli are extracted from EEG and the P2 and N2 are analyzed.Results: The latencies of N2 and P2 in related semantic stimulus are significantly different from that in the unrelated semantic stimulus and psudowords.The amplitudes are not significantly different.The N2 waveform distributes all regions in the scalp, and there is no significant difference in right and left hemisphere.Conclusion: The waveforms and latencies of event-related potentials elicited by three types of stimuli are different.N2 is the main component of semantic stimulus, component P2 is considered to be related with the early semantic comprehension in children.

基金项目：

国家自然科学基金资助(项目号:30470566)

作者简介：

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