Figure 6.

Morphology of the myelin sheath at the spinal cord hemisection site (transmission electron microscope, × 10,000).

(A) Normal myelin with uniform thickness; (B) biological chitin tube group, 2 weeks after surgery, showing slight myelin disintegration; (C) injury group, 2 weeks after surgery, showing considerable myelin disintegration; (D) biological chitin tube group, 14 weeks after surgery, showing coexisting regenerated and disintegrated myelin; (E) injury group, 14 weeks after surgery, showing some myelin regeneration.