Effects of transient and continuous wheel running activity on the upper and lower limits of entrainment to light-dark cycles in female hamsters
Effects of transient and continuous wheel running activity on the upper and lower limits of entrainment to light-dark cycles in female hamsters
复制标题
DOI：
10.1080/07420520701282240
复制
发表时间：
2007-01-01
影响因子：
2.8
通讯作者：
Cambras, Trinitat
中科院分区：
文献类型：
--
作者：
Chiesa, Juan Jose;Diez-Noguera, Antoni;Cambras, Trinitat
夹带限制光暗周期可以修改的实验条件下，他们进行了测试。可能影响夹带的因素之一是动物施加的车轮运行量。在目前的工作中，短暂的和连续的车轮运行的影响，夹带到亮-暗周期进行了测试，使用一系列的T周期夹带限制。将四组雌性仓鼠提交给T周期中的1h逐步变化。两组暴露于T周期，其周期在下限从T22缩短至T18，另外两组暴露于周期在上限从T27延长至T32。一组在下限和一组在上限有连续的访问到一个运行轮，而其他的车轮锁定，除了在一定的T时，缺乏周期控制的T周期出现。研究表明，进入转轮拓宽了卷吸到LD循环的限制。具体而言，进行了以下观察：车轮运行的夹带效应在连续接近车轮的组中更明显，因为它们确实夹带到T19和T32;连续接近车轮仅在T19之后产生后效，但在T32之下不产生后效;当没有轮子的动物表现出相对协调性时，在T31时，解锁轮子有利于所有动物的夹带，但在T19时，6只动物中只有1只。所有这些都表明车轮运行对卷吸上限和下限的不同影响。
The entrainment limits to light-dark cycles can be modified by the experimental conditions under which they are tested. Among the factors that may influence entrainment is the amount of wheel running exerted by the animal. In the present work, the effects of transitory and continuous wheel running on entrainment to light-dark cycles were tested using a range of T cycles at the entrainment limits. Four groups of female hamsters were submitted to 1 h stepwise changes in T cycles. Two groups were exposed to T cycles of which the period was shortened at the lower limit from T22 to T18, and the other two groups were exposed to cycles that lengthened at the upper limit from T27 to T32. One of the groups at the lower limit and one at the upper limit had continuous access to a running wheel, while the others had the wheel locked, except at certain T when a lack of period control by T cycle appeared. The study demonstrates that access to running wheel widens the limits of entrainment to LD cycles. Specifically, the following observations were made: the effects of wheel running for entrainment were more evident in the groups with continuous access to wheel, as they did entrain to T19 and T32; continuous access to a wheel produced aftereffects only after T19, but not under T32; and when animals without a wheel showed relative coordination, unlocking the wheel favored entrainment in all the animals at T31, but in only 1 out 6 at T19. All of these indicate a different effect of the wheel running on the upper and lower limits of entrainment.