CONTEXTUAL CONTROL OF THE EXTINCTION OF CONDITIONED FEAR
CONTEXTUAL CONTROL OF THE EXTINCTION OF CONDITIONED FEAR
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DOI：
10.1016/0023-9690(79)90057-2
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发表时间：
1979-01-01
影响因子：
1.4
通讯作者：
BOLLES, RC
中科院分区：
文献类型：
--
作者：
BOUTON, ME;BOLLES, RC
在第一个情境中，大鼠接受了15对条件刺激和电击，然后在第二个情境中接受了一系列单独的CS试验。尽管这种灭绝过程导致了条件性抑制的完全丧失，但当动物回到最初的条件抑制部位时，抑制被重新恢复到与没有经历过灭绝的动物相当的水平。这种新的抑制不仅仅是由于假条件作用，这表明CS-US[无条件刺激]联系已经灭绝。在从未与休克相关的第三种情况下，重新进行了抑制。抑制的丧失并不一定依赖于消亡背景的抑制条件作用。条件性恐惧的消退可能特定于它发生的背景。讨论了动物可能会区分CS被强化和未被强化的情节，而不依赖于线索的兴奋或抑制状态，如上下文刺激，这些线索恰好出现在这些情节中。
Rats received 15 pairings of a CS [conditioned stimulus] and shock in 1 context, and then a series of CS-alone trials in a 2nd context. Even though this extinction procedure produced a complete loss of conditioned suppression, when the animals were returned to the site of original conditioning, suppression was renewed to a level comparable to that of animals that had not undergone extinction. The renewed suppression was not due solely to pseudoconditioning, suggesting that the CS-US [unconditioned stimulus] association had survived extinction. Renewed suppression was demonstrated in a 3rd context that was never associated with shock. Loss of suppression did not necessarily depend upon inhibitory conditioning of the extinction context. Extinction of conditioned fear may be specific to the context in which it occurs. The possibility is discussed that animals might discriminate episodes in which a CS is reinforced and nonreinforced independently of the excitatory or inhibitory status of cues, like contextual stimuli, that are coincidentally present during those episodes.