from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Biology Relating to or exhibiting approximately 24-hour periodicity.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. of, relating to, or showing rhythmic behaviour with a period of 24 hours; especially of a biological process
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. of or relating to biological processes occurring at 24-hour intervals
The term circadian rhythms refers to biological cycles that repeat about every twenty-four hours.
So I think clearly what we call circadian rhythms, these oscillating clocks within the body, within cells in the body, clearly exist.
"Circadian rhythms are the outward manifestation of an internal timing system which is driven by several genetic elements, what we call circadian clock genes."
There is also the change in circadian rythmns, as I go from being a gainfully employed American to a retired one.
The word circadian is derived from the Latin circa diem or about a day and refers to the mysterious twenty-four-hour rhythms which control all brain outputs-behavioral, autonomic or neuro-endocrine-of all animals or humans who live on Earth with its twenty-four-hour alternation of light and darkness.
Sleep patterns in children and adults follow what is known as the circadian rhythm, which determines how easily we fall asleep, stay asleep, wake up in the morning and maintain a level of alertness during the day.
Your body's clock, or body clock, is the time-keeping system inside you that controls your natural 24-hour sleep and wake cycle also known as your circadian rhythms.
It is called a circadian rhythm and if it is out of sync you get that feeling of being "so tired but I can't sleep" or you fall asleep at 6 p.m. on the couch, wake at 2 a.m. and wonder what happened.
Negative consequencesTeenager's biological rhythms - often referred to as their circadian rhythms - favor later bedtimes and later wake-up times.
The genes regulating this so-called circadian clock leave traces of their activity throughout the body.
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