P300是一种晚认知事件相关电反应。在成人，发生于潜伏期约300ms处。已经证实潜伏期与年龄有关，儿童较长，直至18岁逐渐缩短，18岁以后逐渐延长1．25ms／年。已经观察到听或视刺激均可诱发P。。。，其起源可能是顶和领叶的皮层和皮层下联合区域。已发现，对学习无能症儿童中的 P300 is a late cognitive event-related electrical response. In adults, occurs in the incubation period of about 300ms. The incubation period has been proven to be age-related, with children growing longer until 18 years of age and gradually increasing 1.25ms / year after 18 years of age. It has been observed that both auditory or visual stimuli can induce P. . . , The origin of which may be the top and collar leaves cortical and subcortical regions. Has been found in children learning to be impotent