The difference between group A and B of same denervation time was not statisticall y significant. (3) Apoptotic nuc leus were rarely seen in normal skeletal muscle.

• (2)失神经骨骼肌中染成绿色的胶原纤维增多，早期增生并不明显,失神经支配1年以上肌肉中的胶原纤维增生更为显著。