Misanin J, Collins M, Rushanan S, Anderson M, Goodhart M, Hinderliter C. Aging facilitates long-trace taste-aversion conditioning in rats. Physiol Behav. 2002;75:759-64 pubmed
..The age differences in taste-aversion and the superior long-trace conditioning in old-age rats were attributed to factors that accompany aging, for example, the gradual slowing down of a metabolic pacemaker. ..