PAVLOVIAN CONDITIONING OF THE IMMUNE-SYSTEM

In the classical Pavlovian conditioning paradigm; a stimulus that unco nditionally elicits a physiological response is repeatedly paired with a neutral stimulus that does not elicit that same response. Eventuall y, the neutral stimulus becomes a conditioned stimulus in that it elic its the physiological response in the absence of an unconditioned stim ulus. Here we summarize experiments in which Pavlovian conditioning ha s revealed an intimate relationship between the central nervous system and the immune system.