Controllability/uncontrollability of aversive stimuli and emotion

本研究从条件性情绪反应（CER）和基础情绪水平（BEL）两个方面探讨了外感受性反馈刺激对不可避免性休克恐惧的衰减作用。在两个大鼠实验中，我们采用了三组设计（主组（M），轭组（Y），轭反馈组（YF））在条件舔抑制范式与梭箱回避准备。在实验1中，最小间隔时间为30 s，M组和YF组的BEL低于Y组。在实验2中，最小间隔时间为5 s，M组的BEL低于Y组和YF组。这些结果表明，反馈刺激的恐惧减弱效应取决于其抑制特性。控制性和外感受反馈刺激对BEL的影响有不同的机制，但在CER方面，由于我们采用的测量方法不合适，我们获得的信息很少。

The present research was designed to investigate an attenuating effect of an exteroceptive feedback stimulus on fear from inescapable shock in the two acpects ; Conditioned emotional response (CER) and Basal emotional level (BEL). In two experiments with rats, we employed the triadic design (Groups master (M), yoked (Y), yoked-feedback (YF) in conditioned licking suppression paradigm with shuttlebox avoidance preparation. In Experiment 1, in which minimum inter-trial interval was 30s, Group M and YF demonstrated less BEL than Group Y.In Experiment 2, which minimum inter-trial interval was 5s, Group M demonstrated less BEL than Group Y and YF.These results suggests that fear-attenuating effect of feedback stimulus depends on its inhibitory property, and that there are different underlying mechanisms between the effect of controllability and the effect of exeroceptive feedback stimulus on BEL.In terms of CER,however, we acquired little information because the measure we employed was not appropriate.