中文摘要：

通过对不同情绪唤醒状态下的心率变异性（HRV）和呼吸性窦性心率不齐（RSA）分析，探讨了积极情绪加速高唤醒消极情绪引起的心血管反应向基线恢复的自主神经活动机制。实验表明：与在观看高唤醒恐惧影片结束后观看悲伤影片和中性视频比较，观看高唤醒恐惧影片结束后观看快乐影片加速了高唤醒恐惧影片引起的心率、指脉等心血管反应向基线的恢复；与在观看高唤醒恐惧影片结束后观看悲伤视频和中性视频材料比较，观看高唤醒恐惧影片结束观看快乐影片后的恢复期，被试的迷走神经激活水平迅速增强，迷走神经激活水平甚至超过基线期。积极情绪加速高唤醒消极情绪刺激引起的心血管反应向基线恢复，其自主神经活动机制是在积极情绪状态下个体的交感神经激活迅速降低、迷走神经激活迅速增强。

英文摘要：

The existing studies showed that positive emotions speed up recovery from the cardiovascular aftereffects of negative emo- tions. But the studies provided insufficient evidence for this recovery. What the mechanism of the autonomic nervous activity that brings about the recovery？ Few studies focused on this question. This study aims to reexamine the phenomenon that positive emotions speed up recovery from the cardiovascular sequelae of negative emotions and to explore the mechanism of the autonomic nervous activity underly- ing the recovery. In the experiment, after 180 seconds baseline period, participants were asked to view an emotionally evocative film that induced fear. Immediately following fear arousal, the participants were randomly assigned to view emotionally evocative videos that in- duced amusement, sadness, or neutrality for 220 seconds each. Then, they were kept in a relaxing state for 120 seconds. A total of 96 participants recruited from college students attended the experiment. The results of experiment indicated that, compared with the partici- pants who viewed the neutral and sad secondary videos, those who viewed the positive film exhibited more rapid returns to pre - film lev- els of cardiovascular reactivity. Moreover, compared to participants who viewed the neutral and sad secondary videos, those who viewed the positive film exhibited stronger vagal rebound in recovery periods. Positive emotions speed up recovery from cardiovascular response to negative emotions. The underlying mechanism of the autonomic nervous activity was the fact that stronger vagal rebound was generated in the state of positive emotions.