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P3OO是指能在头皮上记录到的一种长潜伏期电位。它木受任何环境因素的干扰，是受试者对刺激作出反映时的内源性事件相关电位。是反映大脑认知功能、心理活动等方面良好的客观电生理指标。本文设计了藏族与汉族正常儿童P30O认知电位的研究，现报告如下。材料与方法一、研究组来
P3OO is a long latency potential that can be recorded on the scalp. It is disturbed by any environmental factors and is the endogenous event-related potential of the subject when it reflects the stimulus. Is a reflection of the brain cognitive function, mental activity and other aspects of good objective electrophysiological indicators. This article designed a normal Tibetan Pok children and Han P30O cognitive potential, are as follows. Materials and methods First, the research group to