Neuroscience

How the brain's inner clock measures seconds

UCLA researchers have pinpointed a second hand to the brain's internal clock. By revealing how and where the brain counts and represents seconds, the UCLA discovery will expand scientists' understanding of normal and abnormal ...

Neuroscience

Sodium found to regulate the biological clock of mice

A new study from McGill University shows that increases in the concentrations of blood sodium can have an influence on the biological clock of mice, opening new research avenues for potentially treating the negative effects ...

Medical research

Protein found that keeps the circadian clock on schedule

A team of researchers from several institutions in China and two in the U.S. has discovered a protein that keeps the circadian clock on schedule in mice. In their paper published in the journal Science Translational Medicine, ...

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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.

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