Circadian rhythms orchestrate a vast number of life's processes through the activity of a 24-hour internal clock: hormone flow, blood pressure, sleep and wake cycles, and even the timing of hibernation among marmots and bears, ...
Animals and humans follow specific daily patterns known as circadian rhythms, which naturally prompt their bodies to sleep, wake up, eat and have other physiological responses at specific times. The disruption of these rhythms ...
Three Americans won a Nobel Prize on Monday for discovering key genetic "gears" of the body's 24-hour biological clock, the mechanism best known for causing jet lag when it falls out of sync.
Oct 2, 2017
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A handful of large studies of cancer risk factors have found that working the night shift, as nearly 15 percent of Americans do, boosts the chances of developing cancer. MIT biologists have now found a link that may explain ...
Jul 29, 2016
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A pioneering study of worldwide sleep patterns combines math modeling, mobile apps and big data to parse the roles society and biology each play in setting sleep schedules.
May 6, 2016
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If you're looking to improve your heart health by changing your diet, when you eat may be just as important as what you eat. In a new study published today in Science, researchers at San Diego State University and the Salk ...
Mar 12, 2015
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We've all heard about circadian rhythm, the roughly 24-hour oscillations of biological processes that occur in many living organisms. Yet for all its influence in many aspects of our lives—from sleep to immunity and, particularly, ...
Jan 29, 2014
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(Medical Xpress)—Researchers at the University of Surrey in the U.K. have found that drastically altered sleep schedules (such as switching to working a night shift) can dramatically impact gene expression rhythm. In their ...
Every cell in our bodies runs on a 24-hour clock, tuned to the night-day, light-dark cycles that have ruled us since the dawn of humanity. The brain acts as timekeeper, keeping the cellular clock in sync with the outside ...
May 13, 2013
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Infant gut microbiomes oscillate with a circadian rhythm, even when they are cultivated outside of the body. Researchers report in the journal Cell Host & Microbe that the rhythm is detectable as early as two weeks after ...
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A circadian rhythm is a roughly-24-hour cycle in the biochemical, physiological or behavioral processes of living entities, including plants, animals, fungi and cyanobacteria (see bacterial circadian rhythms). The term "circadian", coined by Franz Halberg, comes from the Latin circa, "around," and diem or dies, "day", meaning literally "approximately one day." The formal study of biological temporal rhythms such as daily, tidal, weekly, seasonal, and annual rhythms, is called chronobiology.
Circadian rhythms are endogenously generated, and can be entrained by external cues, called Zeitgebers, the primary one of which is daylight. These rhythms allow organisms to anticipate and prepare for precise and regular environmental changes.
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