Rhythm - The brain's circadian clock regulates sleeping and feeding patterns, alertness, core body temperature, brain wave activity, hormone production, regulation of glucose and insulin levels, urine production, cell regeneration, and many
![illustration of changes in 24-hour rhythms of sleep-wake, melatonin... | Download Scientific Diagram illustration of changes in 24-hour rhythms of sleep-wake, melatonin... | Download Scientific Diagram](https://www.researchgate.net/publication/281982162/figure/fig1/AS:613917688610832@1523380791700/llustration-of-changes-in-24-hour-rhythms-of-sleep-wake-melatonin-secretion-cortisol.png)
illustration of changes in 24-hour rhythms of sleep-wake, melatonin... | Download Scientific Diagram
![Effect of circadian system disruption on the concentration and daily oscillations of cortisol, progesterone, melatonin, serotonin, growth hormone, and core body temperature in periparturient dairy cattle - ScienceDirect Effect of circadian system disruption on the concentration and daily oscillations of cortisol, progesterone, melatonin, serotonin, growth hormone, and core body temperature in periparturient dairy cattle - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S0022030222000030-gr3.jpg)
Effect of circadian system disruption on the concentration and daily oscillations of cortisol, progesterone, melatonin, serotonin, growth hormone, and core body temperature in periparturient dairy cattle - ScienceDirect
![Effects of general versus subarachnoid anaesthesia on circadian melatonin rhythm and postoperative delirium in elderly patients undergoing hip fracture surgery: A prospective cohort clinical trial - eBioMedicine Effects of general versus subarachnoid anaesthesia on circadian melatonin rhythm and postoperative delirium in elderly patients undergoing hip fracture surgery: A prospective cohort clinical trial - eBioMedicine](https://www.thelancet.com/cms/asset/c1cc5feb-4897-4a1b-9195-cc0e555a2745/gr2.jpg)
Effects of general versus subarachnoid anaesthesia on circadian melatonin rhythm and postoperative delirium in elderly patients undergoing hip fracture surgery: A prospective cohort clinical trial - eBioMedicine
Amplitude Reduction and Phase Shifts of Melatonin, Cortisol and Other Circadian Rhythms after a Gradual Advance of Sleep and Light Exposure in Humans | PLOS ONE
![Figure 1 from The impact of sleep deprivation on surgeons' performance during night shifts. | Semantic Scholar Figure 1 from The impact of sleep deprivation on surgeons' performance during night shifts. | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/1edb108fe32f99c29eb5fc952647a685936a7a8d/2-Figure1-1.png)
Figure 1 from The impact of sleep deprivation on surgeons' performance during night shifts. | Semantic Scholar
![The normal synchronous relationships between sleep and daytime activity... | Download Scientific Diagram The normal synchronous relationships between sleep and daytime activity... | Download Scientific Diagram](https://www.researchgate.net/publication/236073666/figure/fig1/AS:279120987607060@1443559037942/The-normal-synchronous-relationships-between-sleep-and-daytime-activity-and-cortisol.png)
The normal synchronous relationships between sleep and daytime activity... | Download Scientific Diagram
![Circadian temperature and melatonin rhythms, sleep, and neurobehavioral function in humans living on a 20-h day | American Journal of Physiology-Regulatory, Integrative and Comparative Physiology Circadian temperature and melatonin rhythms, sleep, and neurobehavioral function in humans living on a 20-h day | American Journal of Physiology-Regulatory, Integrative and Comparative Physiology](https://journals.physiology.org/cms/10.1152/ajpregu.1999.277.4.R1152/asset/images/medium/areg71031003x.jpeg)
Circadian temperature and melatonin rhythms, sleep, and neurobehavioral function in humans living on a 20-h day | American Journal of Physiology-Regulatory, Integrative and Comparative Physiology
![Scheme of circadian rhythms in younger and older adults of melatonin,... | Download Scientific Diagram Scheme of circadian rhythms in younger and older adults of melatonin,... | Download Scientific Diagram](https://www.researchgate.net/publication/366712952/figure/fig2/AS:11431281110325131@1672456043000/Scheme-of-circadian-rhythms-in-younger-and-older-adults-of-melatonin-cortisol-and-core.png)
Scheme of circadian rhythms in younger and older adults of melatonin,... | Download Scientific Diagram
Cyclic variation of temperature, melatonin and cortisol in humans in... | Download Scientific Diagram
Human circadian rhythms of the plasma melatonin level (A), core body... | Download Scientific Diagram
Variations in the sleep-wake cycle from childhood to adulthood: chronobiological perspectives - Document - Gale Academic OneFile
![Light exposure induces equivalent phase shifts of the endogenous circadian rhythms of circulating plasma melatonin and core body temperature in men. | Semantic Scholar Light exposure induces equivalent phase shifts of the endogenous circadian rhythms of circulating plasma melatonin and core body temperature in men. | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/06bb5bf06025d40f6c64b6c4017e57342f950d77/5-Figure3-1.png)