Yokawa T, Murakami N, Furukawa T, Etoh T
Jikken Dobutsu. 1986 Apr;35(2):185-8. doi: 10.1538/expanim1978.35.2_185.
According to the Aschoff's role, exposure to continuous light (LL) results in the elongation of the free-running period of the rat circadian rhythm. However, the LL may not always mean the constant intensity of the light for the suprachiasmatic nucleus, since the rat may regulate the contrast of the illumination by their eyelids which are closed during the sleep phase. In this study, the surgical removal of the eyelids under the LL caused arrhythmicity of the locomotor activity in 7 of 10 rats. The remaining 3 rats maintained the free-running rhythm after the removal of the eyelids. These results suggest that constant light may affect the free-running rhythm of the rat with or without eyelids in the different manner.
根据阿绍夫规则，持续光照（LL）会导致大鼠昼夜节律的自由运行周期延长。然而，对于视交叉上核而言，持续光照并不总是意味着恒定的光照强度，因为大鼠可能会通过在睡眠阶段闭合的眼睑来调节光照对比度。在本研究中，在持续光照条件下对10只大鼠中的7只进行眼睑手术切除后，其运动活动出现了节律紊乱。其余3只大鼠在切除眼睑后仍维持自由运行节律。这些结果表明，恒定光照可能以不同方式影响有或没有眼睑的大鼠的自由运行节律。
