On the neural generators of the P300 component of the event-related potential.
On the neural generators of the P300 component of the event-related potential.
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DOI：
10.1111/j.1469-8986.1993.tb03208.x
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发表时间：
2007-01
期刊：
影响因子：
3.7
通讯作者：
Ray Johnson
中科院分区：
文献类型：
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作者：
Ray Johnson
P300波幅的三重模型(Johnson，1986,1988a)假设，在任何给定的电极位置记录的P300的总波幅代表来自不同神经发生器的活动的总和，每一个都与不同类型的信息的处理有关。然而，这两个原始描述都没有明确描述在实验中确定多个神经源的存在所需的方法。本文回顾了TriArchic幅度模型，随后获得的支持P300下存在多个发电机的假设的数据，以及用于证明这些多个来源的存在的方法。这些方法很简单，因为只需要证明与不同实验变量相关的P300幅度部分具有不同的头皮分布。讨论了P300的多生成基础对成分定义、神经来源分析以及潜在其活动的认知过程等因素的影响。
The triarchic model of P300 amplitude (Johnson, 1986, 1988a) postulated that the overall amplitude of the P300 recorded at any given electrode site represented the summation of activity from different neural generators, each related to the processing of a different type of information. However, neither of these original accounts provided an explicit description of the methods required to establish experimentally the presence of multiple neural sources. This paper reviews the triarchic amplitude model, the subsequently obtained data that support the postulated presence of multiple generators underlying the P300, and the methods used to demonstrate the presence of these multiple sources. These methods are straightforward because it is only necessary to show that the portions of P300 amplitude associated with different experimental variables have different scalp distributions. The implications of the multiple-generator basis of P300 on such factors as component definition, neural source analyses, and the cognitive processes underlying its activity are discussed.