EFFECTS OF ATTENTION AND STIMULUS PROBABILITY ON ERPS IN A GO/NOGO TASK
EFFECTS OF ATTENTION AND STIMULUS PROBABILITY ON ERPS IN A GO/NOGO TASK
复制标题
DOI：
10.1016/0301-0511(93)90009-w
复制
发表时间：
1993-04-01
影响因子：
2.6
通讯作者：
EIMER, M
中科院分区：
文献类型：
--
作者：
EIMER, M
事件相关电位被测量到注视点左边或右边的字母，前面有一个前缀，指示即将到来的字母的位置，正确（有效试验）或不正确（无效试验）。一个字母需要响应（Go刺激），而另一个字母不需要响应（Nogo刺激）。在实验I中，Nogo字母只发生在25%的试验，而在实验II中，去和Nogo字母是等概率的。在这两个实验中，Nogo刺激引起更大的N2组件和P3更前的地形比去刺激。N2增强引起的Nogo刺激表现出额叶最大值（最显着时，去和Nogo刺激等概率），并显着影响precue有效性。这些结果进行了讨论的“反应失配”和行动抑制过程。
Event-related potentials were measured to letters presented either to the left or the right of a fixation point that were preceded by a precue that indicated the position of the upcoming letter either correctly (valid trials) or incorrectly (invalid trials). One letter required a response (Go stimulus), while the other letter required no response (Nogo stimulus). In experiment I, Nogo letters occurred only on 25% of the trials, while in experiment II, Go and Nogo letters were equiprobable. In both experiments, Nogo stimuli elicited larger N2 components and P3s with a more anterior topography than did Go stimuli. The N2 enhancement elicited by Nogo stimuli showed a frontal maximum (most markedly when Go and Nogo stimuli were equiprobable) and was significantly influenced by precue validity. These results are discussed in terms of ''Response Mismatch'' and action inhibition processes.