在控制的情境下，一原本不能引发个体反应的制约刺激(Conditioned Stimuli)，伴随令一会引发个体反应的非制约刺激(Unconditioned Stimuli)，出现多次后，终能使制约刺激与反应间建立新的连结关系。
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Approximately the research includes start effect, being economical in once again study, stimuli effect below threshold, skill study and conditioned reflex.
研究范围大致包括启动效应、重学中的节省、阈下刺激作用、技能学习和条件反射。
Conclusion: Above results suggest that central IL 1 receptors are involved in analgesia induced by footshocks or conditioned fear stimuli.
结论：中枢il 1受体参与足击及条件恐惧应激刺激诱发的镇痛效应。
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