Analysis of regeneration nerve fiber image: After 12 week of operation, effective area of nerve fiber, the medullated nerve fibers density, quantity, diameter and neural sheath thickness of myoblast group were all better than those of the extracellular matrix gel group. 再生神经纤维图像分析:术后12周,在有髓神经纤维密度、神经纤维有效面积、有髓神经纤维数量、直径及髓鞘厚度等指标上成肌细胞组均优于细胞外基质凝胶组。