van Boxtel G J, Brunia C H
Physiological Psychology Section, Tilburg University, The Netherlands.
Biol Psychol. 1994 Sep;38(1):37-51. doi: 10.1016/0301-0511(94)90048-5.
In order to study motor and non-motor aspects of the contingent negative variation (CNV), fifteen right-handed subjects were asked to perform tightly controlled responses in a WS-S1-S2 paradigm. WS was a non-informative warning signal; S1 and S2 provided information about the response required at S2. This information was either delivered before a block of trials (Simple), at S1 (Precued), or at S2 (Choice). Negativity was larger prior to the informative than to the non-informative stimulus, suggesting the presence of a component called stimulus-preceding negativity (SPN). This finding supported the hypothesis that the late CNV consists of a readiness potential and an SPN. The scalp distribution of the SPN was different before S1 and before S2. The significance of these components is discussed in terms of motor preparation, stimulus anticipation and energetical processes.
为了研究关联性负变（CNV）的运动和非运动方面，15名右利手受试者被要求在WS-S1-S2范式中执行严格控制的反应。WS是一个非信息性警告信号；S1和S2提供了关于S2所需反应的信息。该信息要么在一组试验之前（简单模式）、在S1（预提示模式）或在S2（选择模式）传递。信息性刺激之前的负性比非信息性刺激之前的更大，表明存在一种称为刺激前负性（SPN）的成分。这一发现支持了晚期CNV由准备电位和SPN组成的假设。SPN在S1之前和S2之前的头皮分布不同。从运动准备、刺激预期和能量过程方面讨论了这些成分的意义。
