Section diagrams are shown in the coronal plane and ordered from rostral to caudal, beginning with the upper left section and moving clockwise. Distance from bregma: A = −0.3 mm; B = −0.8 mm; C = −0.92 mm; D = −1.4 mm. Sections were adapted from an atlas of the rat brain (Paxinos and Watson, 1998). Circles = insensitive neurons which showed a significant increase in firing rate, Squares = insensitive neurons that did not show a change in firing rate, Triangles = warm sensitive neurons which showed a significant decrease in firing rate. 3V, third ventricle; ac, anterior commissure; AHA, anterior hypothalamic area; AVPe, anteroventral periventricular nucleus; BST, bed nucleus stria terminalis; fx, fornix; LH, lateral hypothalamus; LPO, lateral preoptic area; MnPO, median preoptic nucleus; MPO, medial preoptic nucleus; MPA, medial preoptic area; mfb, median forebrain bundle; ox, optic chiasm; Pa, paraventricular nucleus; Pe periventricular nucleus; PS, parastrial nucleus; Re, reunions thalamic nucleus; Sch, suprachiasmatic nuceus; SM, stria medullaris of thalamus; SO, supraoptic nucleus; StHy, striohypothalamic nuc.; VLPO, ventrolateral preoptic area; VMPO, ventromedial preoptic area.