Fig. 7

Histopathology of the facial nerve by immunofluorescence staining using anti-neurofilament 200. a The axons counted with an automatic counting system are seen as yellow in an enlarged image. Scale bar: 200 µm. b The number of axons at 8 weeks postoperatively. No significant difference was observed between the IGF-1-treated group and the saline-treated group. Saline, n = 6; IGF-1, n = 5. P = 0.484