biorhythm


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biorhythm

or

biological rhythm,

cyclic pattern of changes in physiology or in activity of living organisms, often synchronized with daily, monthly, or yearly environmental changes. Rhythms that vary according to the time of day (circadian rhythms), in part a response to daylight or dark, include the opening and closing of flowers and the nighttime increase in activity of nocturnal animals. Circadian rhythms also include activities that occur often during a 24-hour period, such as blood pressure changes and urine production. Annual cycles, called cirannual rhythms, respond to changes in the relative length of periods of daylight and include such activities as migration and animal mating. Marine organisms are affected by tide cycles. Although the exact nature of the internal mechanism is not known, various external stimuli—including light, temperature, and gravity—influence the organism's internal clock; in the absence of external cues, the internal rhythms gradually drift out of phase with the environment.

biorhythm

[′bī·ō‚rith·əm]
(physiology)
A biologically inherent cyclic variation or recurrence of an event or state, such as a sleep cycle or circadian rhythm.

biorhythm

a cyclically recurring pattern of physiological states in an organism or organ, such as alpha rhythm or circadian rhythm; believed by some to affect physical and mental states and behaviour
References in periodicals archive ?
It is undetermined to what extent the tidal cycle affects the human biorhythm and to what extent humans can alter the impact of the tidal cycle.
None of these glucocorticoid replacement regimens satisfactorily mimic the normal diurnal biorhythm of cortisol, therefore, development of sustained-release hydrocortisone tablets would probably prove beneficial.
If you love it, you'll probably get a kick out of Russell Grant's Astrology, which gives DS owners daily horoscopes, helping you keep track of the current position of the moon and your biorhythm, while offering advice on the important spheres of your life.
There is a political biorhythm in these bilateral relations,'' he said.
Unilever has led the field with several innovative launches, including Dove Pro Age and Sure Biorhythm.
It is packed with fun features including a powerful digital camera, 30+ polyphonic ring tones, a dual colour display and the built-in mirror and you can enter your date of birth into the biorhythm feature to calculate emotional, physical and intellectual levels on a daily basis.
Packed with features ( even one to check her physical and emotional well-being on a daily basis, pop her birthday into the biorhythm feature and it will calculate when she's fragile or likely to argue with you ( and its got a built-in mirror.
IF you're over 35 it could be natural biorhythm changes we all go through
Finally, Parry-Giles and Parry-Giles examine an episode of the MTV series BIOrhythm and the PBS documentary The American President and their role in the redemption of the president in the wake of the Clinton-Monica Lewinsky scandal.
But there tends to be a certain biorhythm to the performance of grand prix teams.
With its eight different biorhythm levels, you'll know if your pet is sad or happy based on its motion, speech, and interaction.
Its Sleep-Tight Rooms have special lighting, a sleep kit with a face mask and ear plugs, a biorhythm lightbox, soundproof windows and other things to help lull guests to sleep.