Figure 2. Effects of post-training intrahippocampal infusion of scopolamine on response latencies in sham- and median raphe nucleus (MRN)-lesioned rats. Each column represents the median (interquartile ranges). Kruskal-Wallis analysis of variance for post-training scopolamine infusion in sham-lesioned groups [H (2, N = 27) = 18.4, P<0.001] and in MRN-lesioned groups [H (2, N = 27) = 23.1, P<0.0001]. *P<0.05, **P<0.001 compared to vehicle control; +P<0.001 compared to sham control (Mann-Whitney U-test). N = 9 animals in all groups.