Fig. 4.

Neural activation after social encounter. Representative photomicrographs showing c-Fos-immunoreactive cells in the cortical amygdala (CoA) (a), piriform cortex (Pir Ctx) (c), and dorsal lateral septum (LSD) (e). All images were taken from representative WT males. Scale bar, 0.1 mm. Summary of data from the CoA (b), Pir Ctx (b), and the LSD (f). Each bar represents the mean number of c-Fos-positive cells per square millimeter ± SEM calculated for each genotype and treatment condition. In all cases, asterisks denote significant differences between exposed and unexposed animals of the same genotype, as assessed using the appropriate Newman–Keuls post hoctest (p < 0.05).