concept

circadian clock

Facts (15)

Sources

Extent and Health Consequences of Chronic Sleep Loss and ... - NCBI ncbi.nlm.nih.gov Colten HR, Altevogt BM · National Academies Press 3 facts

claimCircadian rhythm sleep disorders arise from chronic alterations, disruptions, or misalignment of the circadian clock in relation to environmental cues and the terrestrial light-dark cycle.

claimLewy AJ, Ahmed S, and Sack RL demonstrated that melatonin can be used to phase shift the human circadian clock in a 1996 study published in Behavioural Brain Research.

claimLate bedtimes and rise times can delay an individual's exposure to light, which may prevent the entraining of the circadian clock.

Why Sleep Is Important for Brain Health - American Brain Foundation americanbrainfoundation.org American Brain Foundation Mar 16, 2022 3 facts

claimIndividuals can use light exposure and melatonin to shift their circadian clock to accommodate work or social obligations.

claimMelatonin promotes sleep by decreasing the arousal or alerting signal from the circadian clock.

quoteDr. Zee stated, "It’s better to live with your clock than against your clock."

Sleep Across the Lifespan: A Neurobehavioral Perspective link.springer.com Springer Feb 5, 2025 2 facts

claimCircadian alterations in aging are mechanistically associated with a decline in the functionality of the suprachiasmatic nucleus, which is the structure responsible for regulating the circadian clock.

claimOlder adults require higher light intensity than younger individuals to synchronize their circadian clock and maintain a normal 24-hour rhythm.

The Lunar Clock Beneath the Waves: How Marine Life Runs on ... bioneers.org Bioneers Jul 16, 2025 2 facts

claimIn 2013, chronobiologists identified the first evidence of a genetic 'Moon clock' distinct from the circadian clock in a marine worm and a sea louse.

quote“When we make an appointment, we don’t tell someone just what time it is; we also, hopefully, give them the date. We intermingle two timing systems, and that is basically what these organisms are also doing. There is no voodoo behind it. We have an inner circadian clock. Why shouldn’t animals, or other organisms, also have a calendar system?”

Short- and long-term health consequences of sleep disruption dovepress.com Goran Medic, Micheline Wille, Michiel EH Hemels · Dove Press May 19, 2017 1 fact

claimA study in mice subjected to suprachiasmatic nuclei destruction showed that disruption of circadian coordination accelerated malignant growth, suggesting that the host circadian clock controls tumor progression.

How Lunar Cycles Guide the Spawning of Sea Creatures smithsonianmag.com Smithsonian Magazine Mar 8, 2023 1 fact

claimKristin Tessmar-Raible states that marine creatures require timing systems analogous to a watch and a calendar to coordinate behaviors like spawning, utilizing both a daily circadian clock and a monthly circalunar clock.

Physiology, Sleep Stages - StatPearls - NCBI Bookshelf - NIH ncbi.nlm.nih.gov National Library of Medicine 1 fact

claimAging causes irregular melatonin and cortisol secretion within the circadian clock, potentially due to the gradual deterioration of the hypothalamic nuclei that drive circadian rhythms.

Improvement in sleep duration was associated with higher cognitive ... aging-us.com Aging Oct 20, 2020 1 fact

referenceKondratova and Kondratov (2012) reviewed the role of the circadian clock in the pathology of the ageing brain in Nature Reviews Neuroscience.

The role of light in regulating plant growth, development and sugar ... frontiersin.org Frontiers Jan 6, 2025 1 fact

claimYonekura M. et al. (2013) reported that the promoter activities of sucrose phosphate synthase genes OsSPS1 and OsSPS11 in rice are controlled by light and the circadian clock, but not by sucrose.