Hammel H T, Caldwell F T, Abrams R M
Science. 1967 Jun 2;156(3779):1260-2. doi: 10.1126/science.156.3779.1260.
Lizards (Tiliqua scincoides) regulated their internal body temperature by moving back and forth between 15 degrees and 45 degrees C environments to maintain colonic and brain temperatures between 30 degrees and 37 degrees C. A pair of thermodes were implanted across the preoptic region of the brain stem, and a reentrant tube for a thermocouple was implanted in the brain stem. Heating the brain stem to 41 degrees C activated the exit response from the hot environment at a colonic temperature 1 degrees to 2 degrees C lower than normal, whereas cooling the brain stem to 25 degrees C delayed the exit from the hot environment until the colonic temperature was 1 degrees to 2 degrees C higher than normal. The behavioral thermoregulatory responses of this ectotherm appear to be activated by a combination of hypothalamic and other body temperatures.
蜥蜴（斜纹柔蜥）通过在15摄氏度至45摄氏度的环境之间来回移动来调节其体内体温，以将结肠和大脑温度维持在30摄氏度至37摄氏度之间。一对热电极被植入脑干的视前区，并且一根用于热电偶的折返管被植入脑干。将脑干加热至41摄氏度会在结肠温度比正常温度低1摄氏度至2摄氏度时激活从热环境中的退出反应，而将脑干冷却至25摄氏度会延迟从热环境中的退出，直到结肠温度比正常温度高1摄氏度至2摄氏度。这种变温动物的行为体温调节反应似乎是由下丘脑温度和其他身体温度共同激活的。
