Effects of moxibustion on HE staining and Nissl’s staining in the SN of 6-OHDA-induced PD model rats. (a) HE staining. (b) Nissl’s staining. The shapes and sizes of neurons in the following groups (n = 6 per group): normal control group, sham control group, model group, and moxibustion group. Substantia nigra tissues were stained with H&E and Nissl’s staining. Magnification: 400X.