Initially, presuming (to their credit) that light-dark cycles would be especially important entrainment signals for people, Aschoff and Wever launched the first systematic investigation of human-relevant zeitgebers
in a newly-built underground soundproof bunker specifically designed to insulate subjects from all external time cues.
(10.) Rouleau N, Dotta BT (2014) Electromagnetic fields as structure-function zeitgebers
in biological systems: Environmental orchestrations of morphogenesis and consciousness.
Moreover, behavioral and environmental aspects, as light-dark circle and zeitgebers
influencing the circadian rhythms, like bedtime routines, temperature, social interactions, exercise, and so forth, are known to influence melatonin secretion; however, in case of the studied groups, blood collection was performed under controlled conditions.
Actigraphic studies show a close interdependence of couples' sleep , being in line with the notion of partners as social zeitgebers
The endogenous mammalian circadian clock has a period of approximately 24 hours, which is reset daily by external cues, known as zeitgebers
. The most potent of these is a daily light cue, which entrains the clock in the SCN in mammals through reticulo-hypothalamic signalling mechanisms.
These shallow periods may enhance the ability of fish to use sunrise and sunset as zeitgebers
to entrain a circadian clock (Aschoff, 1965; Takahashi and Zatz, 1982; Neilson and Perry, 1990) or may represent optimal times for feeding on shallow-water prey, such as flying fish, a main portion of the diet of dolphinfish (Olson and Galvan-Magana, 2002).
Influence of chronotype and social zeitgebers
on sleep/wake patterns.
Because poor sleep can impair quality of life, decrease the progression of the recovery process, and increase one's risk for other diseases, (8,9) patients in the POWER program learn the physiology of sleep, including the management of circadian rhythms, social and biological zeitgebers
, and the connection between sleep and memory.
The rhythm is entrained by external cues known as zeitgebers
is German for "time giver," and examples include light, temperature, noise, exercise, and feeding regimens.
Circadian rhythms of FAA are thought to be controlled by a food-entrainable oscillator (FEO) outside of the suprachiasmatic nucleus (SCN); RF schedules are potent zeitgebers
capable of entraining metabolic and hormonal rhythms in peripheral oscillators in anticipation of food.