Methods The left sciatic nerves of80 Sprague- Daw- ley rats were excised to form6 m m defectand the two ends were bridged by silicone tubes,they were random ly di- vided into two groups,CNTF group and normal saline(NS) group.

• 方法 用硅胶管桥接 80只大鼠左侧坐骨神经长 6 m m缺损 ,随机分为两组 ,分别行 CNTF、生理盐水 (NS)靶肌肉注射。