News tagged with circadian rhythms

Related topics: sleep

The neural relationship between light and sleep

Humans are diurnal animals, meaning that we usually sleep at night and are awake during the day, due at least in part to light or the lack thereof. Light is known to affect sleep indirectly by entraining—modifying the length ...

Jun 23, 2017
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Keeping the rhythm in space

Space is an inhospitable environment for the human body but we adapt remarkably well. Within hours, the brain adjusts to the lack of an up or down, as if floating is all it has ever known. Now researchers are learning how ...

Jun 15, 2017
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Delayed meal times reset body clocks

The human body runs according to a roughly 24-hour cycle, controlled by a "master" clock in the brain and peripheral clocks in other parts of the body that are synchronized according to external cues, including light. Now, ...

Jun 01, 2017
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The liver increases by half during the day

In mammals, the liver plays a pivotal role in metabolism and the elimination of toxins, and reaches its maximum efficiency when they are active and feed. Biologists from the University of Geneva (UNIGE), Switzerland, have ...

May 04, 2017
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Circadian rhythm

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.

This text uses material from Wikipedia, licensed under CC BY-SA

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