Abstract

Normal rats presented with a 5% alcohol solution followed by lithium chloride-induced illness quickly learned to avoid drinking alcohol. After training, the rats also avoided drinking water in the presence of the alcohol odor alone, whether tested immediately or 1 month later. In Experiment 1, rats with gustatory neocortex (GN) ablations also developed strong alcohol aversions when the alcohol solution was paired with illness. They also showed normal avoidance of drinking in the presence of the alcohol odor alone when tested soon after training. In Experiment 2, when normal rats were trained to avoid alcohol, given GN ablations, and then tested for retention 1 month later, avoidance of drinking water in the presence of the odor alone was significant but attenuated somewhat in relation to trained control rats. These data support the hypothesis that rats lacking GN partially acquire alcohol aversions by using odor cues and confirm that associative learning is intact in these rats despite the fact that GN rats display significant deficits in aversion learning when only tastes are paired with illness.

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