IGF1 and post-traumatic stress disorder: Anhedonia induced by the PTSD-eliciting protocol in wild type mice was also ameliorated by IGF-I treatment (n = 8 mice/group; F (treatment) = 3.836, P = 0.0208; One-way-ANOVA followed by Tukey’s multiple comparisons test, q (saline vs IGF-I) = 3.892, p = 0.0484; Fig. 4O).