Graf R, Krishna S, Heller H C
Max-Planck Institut fur Neurologische Forschung, Cologne, Federal Republic of Germany.
Am J Physiol. 1989 Mar;256(3 Pt 2):R733-8. doi: 10.1152/ajpregu.1989.256.3.R733.
The daily body temperature (Tb) cycle of pigeons is altered by food deprivation in that Tb falls to lower and lower levels on consecutive nights after the onset of deprivation, whereas the Tb levels during corresponding days remain nearly unchanged. Manipulations of spinal cord temperature, a major feedback parameter in the avian thermoregulatory system, reveal that episodes of nocturnal hypothermia are regulated. The spinal cord threshold temperature for inducing increases in metabolic heat production falls to progressively lower levels each night and returns to normal euthermic levels during the day.
鸽子的每日体温（Tb）周期会因食物剥夺而改变，即剥夺开始后的连续夜晚，Tb会降至越来越低的水平，而相应白天的Tb水平几乎保持不变。对脊髓温度（鸟类体温调节系统中的一个主要反馈参数）的操控表明，夜间体温过低的情况是受到调节的。诱导代谢产热增加的脊髓阈值温度每晚都会逐渐降至更低水平，并在白天恢复到正常的体温水平。
