Circadian Rhythm
1.16 × 10⁻⁵ Hz
The body’s daily clock, which sets the timing of sleep, hormone release and body temperature.
How well is this supported?
Measured directly, or defined by a published standard.
This value is measured, or set by a published standard.
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About this number
The body’s daily clock, which sets the timing of sleep, hormone release and body temperature. It runs on a cycle of about 24 hours: measured without daylight cues, the human cycle averages about 24.2 hours. It is driven by the suprachiasmatic nucleus, a small region of the brain.
Facts
- Frequency
- 1.16 × 10⁻⁵ Hz
- One cycle takes
- 24.00 hours
- Kind of statement
- Physical measurement
- Filed under
- Body rhythms
Sources
- Body rhythms
Heart rate, breathing rate, the daily clock and the sleep cycle.
C. A. Czeisler et al., Science 284 (1999) 2177–2181. N. Kleitman, Sleep 5 (1982) 311–317. J. Moses et al., Nature 265 (1977) 360–361. A. Zaccaro et al., Frontiers in Human Neuroscience 12 (2018) 353.