Endogenous melatonin synthesis is finely regulated by visual light cues received by the hypothalamic suprachiasmatic nucleus in the brain, the site of the major circadian oscillator
The Hb features a semiautonomous circadian oscillator
localized to its lateral region, the LHb.
Iuvone, "Circadian rhythm and photic control of cAMP level in chick retinal cell cultures: a mechanism for coupling the circadian oscillator
to the melatoninsynthesizing enzyme, arylalkylamine N-acetyltransferase, in photoreceptor cells," Brain Research, vol.
Identification of neuromedin S and its possible role in the mammalian circadian oscillator
Is visual sensitivity the only process controlled by a circadian oscillator
Temporal variations that are driven by a circadian oscillator
are evident in many cellular functions including gene expression, metabolic flux rates, concentrations of signaling molecule, and cellular substructures.
At dusk a circadian oscillator
in the brain transmits efferent optic-nerve signals to the lateral eye, influencing almost every physiological and anatomical property of the retina (Table 1).
About the time of sunset, a circadian oscillator
in the brain of the animal generates efferent optic nerve signals to the lateral eye modulating both its structure and function.
Restricted feeding uncouples circadian oscillators
in peripheral tissues from the central pacemaker in the suprachiasmatic nucleus.
Many circadian oscillators
regulate developmental and behavioural events in the flesh-fly, Sarcophaga argyrostoma.
Circadian rhythms are directed by a master biological block in the suprachiasmatic nucleus (SCN) as well as circadian oscillators
in all brain regions and peripheral tissues.
Resetting central and peripheral circadian oscillators
in transgenic rats.