
经典再读 | P3a与P3b的整合理论 - 知乎 - 知乎专栏
摘要:本研究通过考虑影响P300的振幅、潜伏期和一般特征,回顾了关于P300的实验和理论发展,详细介绍了P3a和P3b两个亚成分的神经心理学起源以及目标刺激的辨别难度如何调节地形图,对P3a和P3b的产生位置进行了概述,并且提出了一种认知模型:P3a来源于任务 ...
P3b - Wikipedia
The P3b is a subcomponent of the P300, an event-related potential (ERP) component that can be observed in human scalp recordings of brain electrical activity.
事件相关电位(3):P3家族和N2家族 - 知乎 - 知乎专栏
P3家族包括P3a、P3b、 Nogo-P3 、( Late Positive Component, LPC)、 ( LatePositive Potentials, LPP)等。 P3b 诱发P300的常用实验范式为 “Oddball”范式 ,如果靶刺激呈现的概率比较小(Oddball),就会诱发出显著的P300(Duncan,Johnson &.
脑电必读文章:ERP经典成分汇总 - CSDN博客
2021年11月12日 · P3b:顶区最大,由意外而不经常的,即刺激中不可预测且出现概率较小的变化所诱发,但是该成分仅出现在这些刺激的变化与任务相关时,绝大多数研究者通常将P3b成分就用P3来指代。
Updating P300: an integrative theory of P3a and P3b - PubMed
Neurotransmitter actions associating P3a to frontal/dopaminergic and P3b to parietal/norepinephrine pathways are highlighted. Neuroinhibition is suggested as an overarching theoretical mechanism for P300, which is elicited when …
P3b - an overview | ScienceDirect Topics
P3b, a component of Event-Related Potentials (ERPs), is defined as a neural response occurring around 300-500 ms after the presentation of a task-relevant target stimulus. It reflects attentional allocation, stimulus classification, working memory operations, and decision-making processes in …
P3a和P3b有什么区别? - 知乎
功能:P3b与更高层次的认知处理相关,反映了对任务相关目标刺激的分类、反应和资源分配。它常被认为与记忆更新和目标导向的注意力控制有关。 它常被认为与记忆更新和目标导向的注意力控制有关。
Theoretical Overview of P3a and P3b | SpringerLink
2015年5月27日 · Recent empirical advances on the relationship between the P3a and P3b event-related brain potentials (ERPs) have suggested a plausible approach to how these potentials may interact. The purpose of this chapter is to review the issues surrounding these developments....
The neural loci of P3a and P3b gen-eration are outlined, and a cognitive model is proffered: P3a originates from stimulus-driven frontal attention mechanisms during task processing, whereas P3b originates from temporal–parietal activity associated with attention and appears related to subsequent memory processing.
P300波 - 百度百科
P300波(P300 wave),亦称“P3”、“P3b”。 事件相关电位的一种波形。 P代表正波,300代表潜伏期300毫秒。 通常情况下,P300波的幅度比较大,且跨度范围较宽,由稀少的、任务相关的刺激(称靶刺激)诱发,潜伏期一般在300毫秒或更长,通常分布在中央——顶区,且以中线附近幅度最大。 P300与主观概率、相关任务、刺激的重要性、决策、决策信心、刺激的不肯定性、注意、记忆和情感等多种因素有关。 [1] P300波(P300 wave),亦称“P3”、“P3b”。 事件相关电位 …
- 某些结果已被删除