Figure 2. Behavioral conditioning induced cytokine response.

Behaviorally conditioned suppression of IL-2 release was observed after four CS re-expositions (control group n = 15, experimental group n = 17) (Fig. 2A). In contrast, a single CS re-exposition did not induce a significant inhibition in IL-2 production (control group n = 9, experimental group n = 10) (Fig. 2B). Data are expressed as percental changes from baseline. Bars represent mean ± SEM; ** p<0.01, *** p<0.001.