Intracellular whole-cell recordings from VMPO Neurons. The positions of all recorded neurons in this study are indicated on the above coronal diagrams (temperature insensitive = ●, warm sensitive = ▲ modified from Figures 18–20, Paxinos & Watson, 1998). A corresponds to the anterior regions of VMPO, approximately 400 μm rostral to the areas shown in B, which correspond to the midpoint of the VMPO. C corresponds to the posterior regions of VMPO, approximately 400 μm caudal to the areas shown in B. 3 V, third ventricle; AVPe, anteroventral periventricular nucleus; MPA, medial preoptic area; Pe, periventricular hypothalamic nucleus; ox, optic chiasm; VMPO, ventromedial preoptic nucleus.