A. N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia.
Bull Exp Biol Med. 2021 Apr;170(6):795-798. doi: 10.1007/s10517-021-05157-9. Epub 2021 Apr 24.
The study examined the infradian rhythms in total motor activity and the periods of "freerunning" circadian rhythm in male C57BL/6 mice and European greenfinch Chloris chloris exposed to constant light. In birds and mice, the motor activity was characterized with inphase 4-day-long rhythm. The periods of free-running circadian rhythms in birds and mice were 23 and 25 h, respectively, and they were modulated with 4-day-long periodicity. The maximal deviations in the period of free-running circadian rhythm from the individual mean levels coincided with the acrophase of 4-day-long rhythm of motor activity in both species.
该研究考察了处于持续光照环境下的雄性 C57BL/6 小鼠和欧洲金翅雀的总运动活动的亚昼夜节律和“自由运行”昼夜节律周期。在鸟类和小鼠中，运动活动表现出相位相同的 4 天长周期节律。鸟类和小鼠的自由运行昼夜节律周期分别为 23 小时和 25 小时，并且它们受到 4 天的周期性调制。自由运行昼夜节律周期的最大偏差与两种物种的运动活动 4 天长周期节律的峰值相一致。
