The anatomical schematic diagram in A and B separately showed the location of ARC in rats and mice. The elliptical red area indicated the scope of counting. A hematoxylin and eosin (H&E) staining of brain slice showed the injection site (pointed by the red arrow in C) in the ARC. Vε indicated the third ventricle of mice. To access the data, click or select the words “Appendix 1.”