Fuller C A, Lydic R, Sulzman F M, Albers H E, Tepper B, Moore-Ede M C
Am J Physiol. 1981 Nov;241(5):R385-91. doi: 10.1152/ajpregu.1981.241.5.R385.
Squirrel monkeys (Saimiri sciureus) demonstrate prominent circadian (approx 24 h) rhythms in many behavioral and physiological variables including drinking and body temperature. Both of these rhythms can be entrained by a 24-h light-dark cycle (LD 12:12) but will free-run with an endogenous period in a constantly illuminated (LL:600 lx) environment free of time cues. After radio-frequency lesions were placed stereotaxically in the suprachiasmatic nuclei (SCN) of five monkeys, the circadian rhythm of drinking behavior was disrupted when the monkeys were maintained in LL. However, the circadian rhythm in core body temperature in these animals persisted in LL with a significant circadian spectral component following destruction of the SCN. The SCN thus appear to be of fundamental importance for regulating the circadian organization of drinking; however, an oscillator located elsewhere in the squirrel monkey is capable of generating the core body temperature rhythm.
松鼠猴（松鼠猴属）在包括饮水和体温在内的许多行为和生理变量中表现出显著的昼夜节律（约24小时）。这两种节律都可以被24小时明暗循环（LD 12:12）所调节，但在没有时间线索的持续光照（LL:600勒克斯）环境中会以自身的周期自由运行。在对五只猴子的视交叉上核（SCN）进行立体定位射频损伤后，当猴子处于持续光照环境中时，饮水行为的昼夜节律被打乱。然而，这些动物的核心体温昼夜节律在视交叉上核被破坏后仍在持续光照环境中存在，且具有显著的昼夜节律谱成分。因此，视交叉上核对调节饮水的昼夜节律组织似乎至关重要；然而，松鼠猴体内位于其他部位的一个振荡器能够产生核心体温节律。
