Figure 1: The stage of endogenous neurogenesis/oligogenesis can be divided into three steps: proliferation, migration, and differentiation. Neural stem cells can proliferate in the subventricular zone (SVZ), and a sub-population of these cells can migrate toward the infracted lesion, and differentiate into neurons, or oligodendrocyte (OCs). OPCs: Oligodendrocyte Precursor Cells.