Abstract
Rats were trained in a one-trial appetitive task using water motivation. Brain catecholamine and metabolite levels were assessed in samples collected 10 min after training. There was no evidence that brain NE levels were modified by training, although catecholamine levels increased when the animals were placed in a novel environment. These results differ from those obtained after avoidance training where the extent of a post-training decrease in brain norepinephrine predicts later retention performance.
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