NTRK2 and stroke disorder: Moreover, aged stroke animals treated with TrkB-Fc completed the reversal task approximately 3.1 times slower than aged stroke control animals (HR: 3.136, p = 0.0073, CI: 0.8256-11.91), performing similarly to aged sham animals (HR: 0.9144, p = 0.8758, CI: 0.297-2.811).