Fig. 4.
Remyelination after SCI. This figure shows the changes in remyelination after SCI. In the acute phase of SCI, the number of oligodendrocytes is reduced, and the integrity of myelin is disrupted. In the subacute phase of SCI, OPCs are activated and begin to differentiate into new oligodendrocytes. Additionally, a small number of OPCs can differentiates into Schwann cells. endo-NSCs are activated, and some of them differentiate into oligodendrocytes. In the chronic phase of SCI, newborn oligodendrocytes form myelin around spared or regenerated axons