Fig. 2

Double immunohistochemical staining of Fos-IR and TH-IR neurons in the PVN (a, b) and SON (c, d) of the hypothalamus in unstressed rats (a, c) and rats exposed to restraint water-immersion stress for 1 h (b, d). The insets show higher magnification (×400) of cells in the small boxes. Fos-IR is localized in nuclei, and TH-IR is found in the cytoplasm. PNV, paraventricular hypothalamic nucleus; PaLM, lateral magnocellular part of the PVN; PaV, ventral part of the PVN; PaMP, medial parvocellular part of the PVN; PaDC, dorsal cap of the PVN; Pe, periventricular part of the PVN; 3V, 3rd ventricle