a nonsignificant trendP = 0.1650
As shown in Figure 2 , one-way ANOVA followed by Newman–Keuls post-hoc tests revealed no significant difference in the level of c-Fos ( F (2,13) = 2.409; P = 0.1288) among the three age groups, and a nonsignificant trend toward a decrease in Zif268 with age ( F (2,14) = 2.055; P = 0.1650).