不同唤醒度负性刺激抑制控制特点

The Behavior Inhibition Characteristics of Different Arousal Negative Stimulation

本研究运用事件相关电位(ERP)技术,采用双选择情绪oddball范式,探讨不同唤醒度负性刺激的行为抑制特点。实验选取15名大学生作为被试,要求被试对标准刺激和偏差刺激(75%vs.25%)分别作不同的按键反应,记录按键前后的脑电。偏差刺激由高、低唤醒两种来自国际情绪图片系统的情绪图片组成。本研究主要分析反应抑制过程的N2和P3的波幅和潜伏期。结果显示:对高、低唤醒刺激的抑制反应诱发的N2波幅和潜伏期没有差异,对高唤醒刺激抑制反应诱发的P3波幅大于低唤醒的P3波幅,并且差异显著。结论:对高唤醒刺激进行抑制控制的结果是产生更大的P3波幅,这一过程的结果显示,人类对高唤醒刺激更难进行抑制控制。

This research discussed the behavior inhibit characteristics of different arousal negative stimula- tions with the event related potential technology and classical oddball paradigm. This study selected 15 un- dergraduate and graduate students as the subjects. They were asked to press the key as fast and accurately as possible according to different stimulations（ high sensei stimulation, low sensei stimulation and standard stimulus） and corresponding brain wave of these different types of incentives were recorded. The results showed that there was a significant difference among different arousal negative stimulations. In 210 - 300ms time interval, average amplitude was prominently different as well as latency; In 380-430ms time interval, there was a significant difference in average amplitude, too; It was found from the analysis of behavior inhibition process that the average amplitude of N2 and P3 wave exist significant differences in average volatility. These results reflect that there is a notable difference in behavior inhibition of different arousal negative stimulation. In the condition of high arousal stimulation, it is individual reaction monitor- ing conflicts and subsequent brain activity of behavior inhibit that were enhanced. The high arousal nega- tive emotion has an obvious facilitated effect to behavior inhibition.