Figure 3: Effect of combination of myelin-associated glycoprotein and chitin conduit on the ultrastructure of regenerated axons in proximal nerve stumps 8 weeks postoperatively. (A) Transmission electron microscopy of cross sections of proximal nerve stumps in the model, conduit, and combination groups. Scattered axons with thick myelin sheaths were observed in the combination group. Black arrows indicate the myelin sheath. Scale bar: 5 μm. (B, C) Quantitative results of myelin sheath thickness (B), and the ratio of unmyelinated to myelinated axons (C). Data are expressed as the mean ± SD (n = 5 animals per group). ##P < 0.01, vs. model group; **P < 0.01, vs. conduit group (one-way analysis of variance followed by Tukey’s post hoc test).