Keywords: BDNF; brain-derived neurotrophic factor; CNTF; ciliary neurotrophic factor; CST; corticospinal tract; EDTA; ethylenediaminetetraacetic acid; GDNF; glial cell-line-derived neurotrophic factor; NT3; neurotrophin-3; p75NTR; p75 neurotrophin receptor; PKCγ;