PSYC 351 Chapter Notes - Chapter 3-4: London Academy Of Music And Dramatic Art, Neural Coding, Thalamus
2 Nov 2016
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Analysis of the extinction of conditioned inhibition is not correct. Repeated presentations of a conditioned inhibitor (cs-) by itself will lead to loss of conditioned inhibition. Views extinction as the reverse of acquisition, or the return of the associative value of a cs to zero. Extinction appears to involve the learning of a new relationship between the cs and the us (the us no longer follows the cs). Amygdala: structure that plays a key role in linking new affective responses to previously neutral stimuli. People who have experienced damage to this neural structure exhibit a peculiar lack of fear to stimuli that trigger danger. Key premise to rescorla-wagner model: unexpected events engender more processing that those that are expected. Human imaging studies have shown that unexpected events induce greater neural activity within the amygdala. Conditioned expectation of the us drives both freezing behavior and a conditioned analgesia that can reduce the incoming pain signal.
