4Gordon T. The role of neurotrophic factors in nerve regeneration. Neurosurg Focus, 2009, 26: E3.
5Radtke C, Akiyama Y, Lankford K, et al. Integration of engrafted Schwann cells into injured peripheral nerve: axonal association and nodal formation on regenerated axons. Neurosci Lett, 2005,387 : 85 - 89.
7Leighton TG.What is ultrasound? Prog Biophys Mol Biol,2007,93(1-3):3-83.
8Nyborg WL.Biological effects of ultrasound:development of safety guidelines,part Ⅱ:general review.Ultrasound Med Biol,2001,27(3):301-333.
9Wood RW,Loomis AL.The physical and biological effects of high-frequency sound waves of great intensity.J Franklin Inst,1928,205(1):151-153.
10Kramer JF.Effect of therapeutic ultrasound intensity on subcutaneous tissue temperature and ulnar nerve conduction velocity.Am J Phys Med,1985,64(1):1-9.
