5Zhang X,Verge V,Wiesenfeld Hallin Z,et al. Nitric oxide synthase like immunoreactivity in lumbar dorsal root ganglia and spinal cord of rat and monkey and effect of peripheral axotomy[J]. J Comp Neurol, 1993,335(4):563~575.
6Mariotti R,Peng ZC,Kristensson K,et al. Age-dependent induction of nitric oxide synthase activity in facial motoneurons after axotomy[J]. Exp Neurol, 1997,145(2):361~370.
7Li L,Oppenheim RW,Lei M,et al. Neurotrophic agents prevent motoneuron death following sciatic nerve section in the neonatal mouse[J]. J Neurobiol, 1994,25(7):759~766.
8Oppenheim RW. The absence of significant postnatal motoneuron death in the brachial and lumbar spinal cord of the rat[J]. J Comp Neurol, 1986,246(2):281~286.
9Koliatsos VE,Price WL,Pardo CA,et al. Ventral root avulsion: an experimental model of death of adult motor neurons[J]. J Comp Neurol, 1994,342(1):35~44.
10Li L,Wu W,Lin LF,et al. Rescue of adult mouse motoneurons from injury induced cell death by glial cell line derived neurotrophic factor[J]. Proc Natl Acad Sci USA, 1995,92(21):9771~9775.