Levels of (A) TrkB phosphorylation and (B) correlation analysis of CREB phosphorylation with memory performance in Barnes maze test with 7,8-DHF (5 mg/kg) or exercise their combination among rats subjected to fluid percussion injury (FPI). Data are presented as percentage (%) of Sham/VEH (mean ± SEM). *P < 0.05, **P < 0.01, relative to Sham/VEH; #P < 0.05, ##P < 0.01, relative to FPI/VEH; †P < 0.05, ††P < 0.01 relative to FPI/7,8-DHF or FPI/Exc (one-way ANOVA followed by Bonferroni test).