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Relations (1)
related 2.58 — strongly supporting 5 facts
Cortisol is intrinsically linked to the circadian rhythm as its secretion levels naturally fluctuate throughout the day in a rhythmic pattern [1]. This relationship is further evidenced by the observation that cortisol secretion cycles are established in infancy [2] and can become irregular or advanced due to shifts in the circadian rhythm during aging {fact:1, fact:3}, a connection supported by research on stress neurobiology [3].
Facts (5)
Sources
Integrating allostasis and emerging technologies to study complex ... nature.com 2 facts
claimCortisol levels normally follow a circadian rhythm, peaking in the morning and tapering off by evening, which is linked to immune, metabolic, and cardiovascular regulation.
referenceThe source cites several key works on stress neurobiology and allostasis, including Godoy et al. (2018) on stress neurobiology, Cannon (1929) on physiological homeostasis, Azmi et al. (2021) on cortisol and circadian rhythm, Sterling and Eyer (1988) on allostasis and arousal pathology, McEwen and Wingfield (2003) on allostasis in biology, Chodkiewicz (2023) on addiction memory and allostasis, George et al. (2012) and Koob and Le Moal (2001) on allostasis and addiction, Savransky et al. (2018) on allostatic load in schizophrenia, and Honkalampi et al. (2021) on allostatic load in depression.
Physiology, Sleep Stages - StatPearls - NCBI Bookshelf - NIH ncbi.nlm.nih.gov 2 facts
claimBy 3 months of age, infants exhibit cycling of melatonin and cortisol in a circadian rhythm, and sleep onset begins with NREM sleep.
claimOlder adults often experience insomnia and earlier wake times, which studies hypothesize is due to an advanced circadian rhythm that causes irregular melatonin and cortisol secretion.
Sleep Across the Lifespan: A Neurobehavioral Perspective link.springer.com 1 fact
claimThe earlier shift in sleep timing during aging is believed to mirror biological alterations in the circadian rhythm, including an overall decline in melatonin levels, earlier melatonin release, an advance in cortisol secretion, and a diminished range of core body temperature fluctuation throughout the day.