The Preoptic anterior hypothalamus (or POAH) is the part of the brain that senses core body temperature and regulates it to about 36.8 °C (98.6 °F).

U.S. patent 6,188,930 -- Method for Heating the Preoptic Anterior Hypothalamus

• Stained brain slice images which include the "Hypothalamus" at the BrainMaps project
• The Hypothalamus and Pituitary at endotexts.org

• Hypothalamus
• Preoptic area
• Thermoregulation