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.
Cortés-Sol et al. BMC Neuroscience 2013 14:7 doi:10.1186/1471-2202-14-7