[A comparative study of autologous facial nerve graft in situ with the vein tubulation: the observation of neurons changes].

For further study of the effects of the repairment of facial nerve with vein tubulation, we used horseradish peroxidase (HRP) retrograde mark method to observe the changes of the labeled cells in facial neucleus after the tubulation of rat facial nerve. And, we compared the changes with nerve graft in situ and the normal group. The results showed: 1. The vein tubulatiton can repair the short defect of facial nerve as well as the nerve graft does. 2. Irregular outgrowth of axon sprouts could be found in both methods. 3. There was few chance for homolateral target organ to be reinnervated by contralateral motoneurons in both methods. 4. Using the vein tubulation method, a more natural relationship between the peripheral target organ and central nucleus may be easily achieved.