Hamon J F, Gauthier P, Gottesmann C
Laboratoire de Physiologie Animale et de Psychophysiologie, Abidjan, France.
Physiol Bohemoslov. 1989;38(3):231-40.
The purpose of the experiment was to study the effects of psychological factors on slow brain potentials in relation to information processing and strategy establishment. Subjects were subjected to paired stimuli: A) two identical tone bursts (50 ms, 5000 Hz); B) two different stimuli the second (unconditioned) was a low pitched tone burst (50 ms, 500 Hz); C) only the warning stimulus was delivered to the subjects. In a first experiment, subjects (N = 10) were asked to detect and signal by a motor act the low pitched click (B); in a second experiment, subjects (N = 8) were to detect and signal in the same way the unconditioned tone burst omission (C). Results showed that the auditory event-related potentials (ERP) obtained in the two experiments presented two components: a negative wave (N150) followed by a positive one (P270). Solely, the late positive component differed in topography during the two situations. A fronto-central Contingent Negative Variation (CNV) appeared in all the conditions for the two experiments while a Post Imperative Negative Variation was often obvious in the first experiment.
该实验的目的是研究心理因素对与信息处理和策略建立相关的慢脑电位的影响。受试者接受成对刺激：A）两个相同的纯音脉冲（50毫秒，5000赫兹）；B）两个不同的刺激，第二个（非条件刺激）是一个低音调的纯音脉冲（50毫秒，500赫兹）；C）仅向受试者提供警告刺激。在第一个实验中，要求受试者（N = 10）通过一个运动动作检测并发出低音调咔哒声（B）的信号；在第二个实验中，要求受试者（N = 8）以相同方式检测并发出非条件纯音脉冲遗漏（C）的信号。结果表明，在两个实验中获得的听觉事件相关电位（ERP）呈现出两个成分：一个负波（N150），随后是一个正波（P270）。仅在两种情况下，晚期正成分在地形图上有所不同。在两个实验的所有条件下都出现了额中央关联负变化（CNV），而在第一个实验中，指令后负变化通常很明显。
