Figure 9.
The number of serotonin-positive neurons on the right side of the dorsal raphe nucleus was obtained at 3 anatomical levels. The mean of all of the levels was obtained for each animal and then the overall mean was obtained for the group so that the SEM represents the variance between animals. There were significantly fewer serotonin neurons in the SS group (ANOVA, p < 0.03). * Significantly different from HSR with Tukey’s posthoc pairwise comparison, p < 0.05. Reprinted from Bethea et al., 2005b.