Figure 3.

Corticosterone levels before and after a single training. In WT males a significant increase in corticosterone levels was observed on day 1, 15 min post-training ([*] P < 0.001), and on day 7 post-context or auditory cue re-exposure ([*] P < 0.05). In KO males no significant differences in corticosterone levels were observed. In WT females a significant increase in corticosterone was observed only on day 1, 15 min post-training ([*] P < 0.001). In KO females no significant differences between corticosterone levels pre- and post-training were observed.