NOS1 and Anxiety: Consistently, 21 days CORT exposure (20 mg/kg, s.c.)caused anxiety behavior in WT mice but not in nNOS−/− mice (Figure 4J‐K, two‐way ANOVA, central distance: F3,44 = 14.69, P < .001, WT vehicle vs. WT CORT, P < .05, nNOS−/− vehicle vs. nNOS−/− CORT, P > .05; central time: F3,44 = 8.80, P < .01, WT vehicle vs. WT CORT, P < .05, nNOS−/− vehicle vs. nNOS−/− CORT, P > .05, n = 10‐13).