Forward conditioning with wheel running causes place aversion in rats |
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Authors: | Masaki Takahisa Nakajima Sadahiko |
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Institution: | Psychology Section, Department of Integrated Psychological Science, Kwansei Gakuin University, Nishinomiya, Hyogo, Japan. |
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Abstract: | Backward pairings of a distinctive chamber as a conditioned stimulus and wheel running as an unconditioned stimulus (i.e., running-then-chamber) can produce a conditioned place preference in rats. The present study explored whether a forward conditioning procedure with these stimuli (i.e., chamber-then-running) would yield place preference or aversion. Confinement of a rat in one of two distinctive chambers was followed by a 20- or 60-min running opportunity, but confinement in the other was not. After four repetitions of this treatment (i.e., differential conditioning), a choice preference test was given in which the rat had free access to both chambers. This choice test showed that the rats given 60-min running opportunities spent less time in the running-paired chamber than in the unpaired chamber. Namely, a 60-min running opportunity after confinement in a distinctive chamber caused conditioned aversion to that chamber after four paired trials. This result was discussed with regard to the opponent-process theory of motivation. |
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Keywords: | Conditioned place aversion Place conditioning Activity wheel Running Exercise Rat |
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