Figure 3
Photomicrograph of a middle transversal section of the PVN from a female rat. A) High capillary density visualized in the still unstained section; note that the border of the nucleus is easily identifiable. B) The same section after cresyl violet staining; capillaries no longer visible but stained neurons can be seen. The 100 x100 μm squares delimit sampling fields within the parvocellular (left) and magnocellular (right) subdivisions.