| Popis: |
Four experiments attempted to establish conditioned consummatory behavior in rats using lateral hypothalamic (LH) stimulation as US. In the first, a light CS that predicted LH stimulation came to produce increased activity, but not eating, drinking, or gnawing. In the remaining three experiments, a different model of Pavlovian conditioning, derived from autoshaping, was used. Presentation of an illuminated drinking tube served as the stimulus that predicted LH stimulation. Many rats increased contact with and drinking from this predictive stimulus. Various controls showed that these increases were at least partly based on the contingency between tube presentation and LH stimulation. LH stimulation that induced a consummatory behavior was more likely to support increased drinking from the predictive tube than was LH stimulation that induced only increased activity. However, the kind of consummatory behavior the LH stimulation induced did not affect the occurrence of drinking from the predictive tube. This finding supports the hypothesis that LH stimulation in rats does not activate neural circuits associated with specific consummatory behaviors. |
