Diseases, Conditions, Syndromes

Seven tips to get your sleep cycle back on track during lockdown

You might have noticed your normal sleep pattern has changed. Some of us may be sleeping more, and some of us may be sleeping less. Life has changed dramatically for many of us, with our usual daily routine—including commutes, ...

Health

Lighting color and intensity affects sleep at nursing homes

The science of lighting is about more than brightness, efficiency, and cost. Just ask anyone with seasonal affective disorder, or SAD, how gray skies and short days can affect their mood. It turns out that light—the right ...

Neuroscience

Time of day affects global brain fluctuations

As the day progresses, the strength of the brain's global signal fluctuation shows an unexpected decrease, according to a study published on February 18 in the open-access journal PLOS Biology by Csaba Orban and a multi-disciplinary ...

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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