Effects of food deprivation on daily changes in body temperature and behavioral thermoregulation in rats
Effects of food deprivation on daily changes in body temperature and behavioral thermoregulation in rats
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DOI：
10.1152/ajpregu.2000.278.1.r134
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发表时间：
2000-01-01
影响因子：
2.8
通讯作者：
Kanosue, K
中科院分区：
文献类型：
--
作者：
Yoda, T;Crawshaw, LI;Kanosue, K
恒温动物通过自主神经和行为机制调节体温。在后一个过程中，当动物暴露在过热或过冷的环境中时，它们会寻找更凉爽或更温暖的地方。体温调节受体内能量储备状态的影响。在本研究中，我们研究了4天的食物禁食对大鼠结核病昼夜节律变化以及对冷逃逸和热逃逸行为的影响。连续监测禁食期间的TB波幅，峰值与基线值无明显差异，但低谷波幅在禁食开始后持续下降。食物剥夺促进了小鼠的逃冷行为，而热逃逸行为没有变化。停止禁食后，降低的结核病在第一天恢复正常。然而，在食物重新引入后的第三天，仍然促进了冷逃避行为的发生。在食物短缺的情况下，自主和行为温度调节效应器被调节，以便在活动期保持最佳性能，而在静止期则增加能量节约。
Homeothermic animals regulate body temperature (Tb) by using both autonomic and behavioral mechanisms. In the latter process, animals seek out cooler or warmer places when they are exposed to excessively hot or cold environments. Thermoregulation is affected by the state of energy reserves in the body. In the present study, we examine the effects of 4-day food deprivation on circadian changes in Tb and on cold-escape and heat-escape behaviors in rats. Continuous measurement of Tb during food deprivation indicated that the peak Tb amplitude was not different from baseline values, but the trough amplitude continuously decreased after the onset of food deprivation. Cold-escape behavior was facilitated by food deprivation, whereas heat-escape behavior was unchanged. After the termination of food deprivation, the lowered Tb returned to normal on the first day. However, cold-escape behavior was still facilitated on the third day after food reintroduction. Autonomic and behavioral thermoregulatory effecters are modulated in the face of food shortage so as to maintain optimal performance during the active period, whereas increasing energy conservation occurs during the quiescent phase.