**Figure 4.** (**A**) Morphological changes at one week after SCI. (**a**–**j**) HE staining in each group. Scale bars: **a**–**c** 100 μm, **f**–**j** 50 μm. (**k**–**t**) Nissl staining in each group. Scale bars: **k**–**o** 100 μm, p–t 50 μm; (**B**) Quantitative analysis showed that the number of neurons in the OEC+NSC group was significantly increased in comparison with that in the DMEM group or NSC group. (mean ± SEM; one-way ANOVA, *post-hoc* test: Dunn-Bonferroni; error bar: 95% CI; *P<0.05, pairwise comparisons of other groups: P < 0.01).