The immunohistochemical positive products on bFGF,GDNF,PDGF and IGF-I were observed in the neurons of gray matter,especially in both ventral horns and the deep of dorsal horns.

• bFGF ,GDNF ,PDGF ,IGF -I的免疫阳性反应物主要见于脊髓灰质内各板层神经元 ,腹角和背角深部明显 ,背角浅层较少见。