Competition between ethanol-induced reward and aversion in place conditioning

被引:0
|
作者
Cunningham, CL [1 ]
Smith, R [1 ]
McMullin, C [1 ]
机构
[1] Oregon Hlth Sci Univ, Dept Behav Neurosci, Portland, OR 97239 USA
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中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
Previous place conditioning studies in mice have shown that injection of ethanol immediately before a conditioned stimulus (CS+) produces conditioned preference, whereas injection of ethanol immediately after CS+ produces conditioned aversion. In the present experiments, we examined the learning that occurs when ethanol is injected in "ambiguous" procedures that provide the opportunity for both types of conditioning. When ethanol was given midway through the CS (Experiments 1 and 2) or both before and after the CS (Experiment 3), the direction of place conditioning was the same as when mice were exposed only to whichever contingency occurred first (a primacy effect). That is, injection of ethanol in the middle of the CS conditioned aversion, whereas injection both before and after the CS conditioned preference. Because these results support the idea that ethanol elicits both aversive and rewarding effects, they are most consistent with conditioning theories that conceptualize unconditioned stimuli (USs) as events that can activate multiple representational components.
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页码:273 / 280
页数:8
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