Dib B, Cabanac M
Brain Res. 1984 Jun 4;302(1):1-7. doi: 10.1016/0006-8993(84)91279-4.
Rats were chronically implanted with a hypothalamic thermode. After recovery the thermode was heated and the rats were exposed to 4 ambient temperatures (Ta) 20, 30, 35 and 40 degrees C. For each Ta they were subjected to 3 conditions: (1) they could press a bar which provided them with a cool wind; (2) they could press a bar which cooled the hypothalamic thermode; and (3) both bars were active and the rat could press either one. Skin, hypothalamic, and rectal temperatures were recorded at the same time. The results indicate that when rats had either only or by choice access to the lever that cooled their hypothalamus, they used it in such a way as to prevent their hypothalamus from overheating. A lower priority was given to the maintenance of skin temperature.
大鼠被长期植入下丘脑温度调节装置。恢复后，加热温度调节装置，并将大鼠置于4种环境温度（Ta）下，分别为20℃、30℃、35℃和40℃。对于每种Ta，大鼠要经历3种情况：（1）它们可以按压一根杆，该杆会为它们提供冷风；（2）它们可以按压一根杆，该杆会冷却下丘脑温度调节装置；（3）两根杆都可用，大鼠可以按压任意一根。同时记录皮肤、下丘脑和直肠温度。结果表明，当大鼠只能或可选择地使用冷却其下丘脑的杠杆时，它们会以防止下丘脑过热的方式使用该杠杆。维持皮肤温度的优先级较低。
