Fluoro-Gold (FG) retrograde tracing.

<p>FG-positive motoneurons in spinal cord (A–D) and sensory neurons in DRG (E–H) in the no-injured group (A, E), autograft group (B, F), L-CCH group (C, G), and L-CCH+OW group (D, H) at 12 weeks postoperatively. The total number of FG-positive motoneurons (I) and sensory neurons (J) which regenerated into distal nerve stump was plotted as a function of time postoperatively. All data are expressed as the mean ± standard error of mean. *<i>P</i><0.05 for the comparison with the L-CCH group.