Tafil-Klawe M, Klawe J J
Katedra i Zakład Fizjologii Akademii Medycznej, Bydgoszczy.
Postepy Hig Med Dosw. 1999;53(3):497-503.
The sleep-wake cycle is one of the endogenous rhythm of the body that become entrained to the day/night cycle. Light serves as a Zeitgeber, a stimulus that entrains an endogenous rhythm to the circadian clock. A direct retinohypothalamic tract (RHT) conveyed information about light to the internal circadian pacemaker. The primary biological clock is located in the suprachiasmatic nucleus (SCN). The RHT may serve to couple the circadian system to the external light/dark cycle.
睡眠-觉醒周期是人体的内源性节律之一，会与昼夜周期同步。光充当授时因子，即一种将内源性节律与生物钟同步的刺激。一条直接的视网膜下丘脑束（RHT）将有关光的信息传递给内部生物钟起搏器。主要生物钟位于视交叉上核（SCN）。RHT可能起到将生物钟系统与外部明暗周期耦合的作用。
