FIG. 3. Parvocellular AVP and OT neurons in the PVN give rise to axons that terminate in a variety of extrahypothalamic areas, depicted schematically in this figure. A subset of these AVP and OT projections may arise from neurons in the bed nucleus of the stria terminalis (see text). DR, dorsal raphe; DVC, dorsal vagal complex; IML, intermediolateral cell column of the spinal cord; LC, locus coeruleus; LR, lateral reticular nucleus; MPO, medial preoptic area; OB, olfactory bulb; PAG, periaqueductal gray; PB, parabrachial nucleus; PVN, paraventricular nucleus of the hypothalamus; RM, raphe magnus; RO, raphe obscurus; SG, substantia gelatinosa of the spinal cord; SG-5, substantia gelatinosa of the trigeminal nucleus; SN, substantia nigra; VTA, ventral tegmentum.