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The bunker experiment was a scientific experiment that began in 1966 to test whether humans, like other species, have an intrinsic circadian clock. [1] It was started by Jürgen Aschoff and Rütger Wever of the Max Planck Institute for Behavioral Physiology and later taken over by Jürgen Zulley.
A circadian rhythm (/ s ər ˈ k eɪ d i ə n /), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours.Circadian rhythms can refer to any process that originates within an organism (i.e., endogenous) and responds to the environment (is entrained by the environment).
Specifically, exposure to light at night can throw your circadian rhythm out of whack, which raises the risk of inflammation. This increases the odds you’ll develop a host of different diseases.
Early research into circadian rhythms demonstrated that, when humans are without zeitgebers, or in constant lighting conditions, they have a "free running" period of 24.9 hours. [7] In this experiment, humans were in an underground, sound-proof bunker where the lights were continuously on.
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A constant routine protocol is a common method used in human circadian rhythm research to study internally generated, or endogenous, circadian rhythms without the effect of external, or exogenous, influences. In the method, subjects are kept in constant conditions for at least 24 hours. [1]
Jet lag occurs when one’s circadian rhythm is out of sync with the environment, and this is usually caused by travel across time zones. People with jet lag experience symptoms such as fatigue, insomnia, headaches, etc. Light therapy has been hypothesized to help mitigate these symptoms.
In vertebrates, the master circadian clock is contained within the suprachiasmatic nucleus (SCN), a bilateral nerve cluster of about 20,000 neurons. [10] [11] The SCN itself is located in the hypothalamus, a small region of the brain situated directly above the optic chiasm, where it receives input from specialized photosensitive ganglion cells in the retina via the retinohypothalamic tract.
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262 Neil Avenue # 430, Columbus, Ohio · Directions · (614) 221-7464