Regulated nocturnal hypothermia induced in pigeons by food deprivation.
Regulated nocturnal hypothermia induced in pigeons by food deprivation.
复制标题
缺乏食物引起的鸽子夜间体温过低。
DOI：
10.1152/ajpregu.1989.256.3.r733
复制
发表时间：
1989
期刊：
影响因子：
--
通讯作者：
H. Heller
中科院分区：
文献类型：
--
作者：
R. Graf;S. Krishna;H. Heller
鸽子的每日体温（Tb）周期会因食物剥夺而改变，因为在剥夺食物后的连续几个晚上，Tb水平会越来越低，而在相应的白天，Tb水平几乎保持不变。脊髓温度是鸟类体温调节系统的一个主要反馈参数，它的操作表明夜间低体温的发作是受调节的。诱导代谢产热增加的脊髓阈温度每晚逐渐下降到较低的水平，并在白天恢复到正常的恒温水平。
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.