How To Use Circadian In A Sentence
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In mammals, including humans, a master clock in the brain and subordinate clocks found in organs throughout the body coordinate daily, or circadian, rhythms of behavior and physiology.
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The SCN has long been implicated in the circadian rhythmicity of wheel running, and the High-Runner mice display a shorter free-running circadian period than Control mice under both constant light and constant dark.
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The more regular your schedule, the easier it is to retrain your circadian rhythm in a twenty-four-hour time period.
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Failure to synchronize your patterns of activity and stimulation with your body's natural circadian and ultradian rhythms puts a stress on the system.
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But seriously, there really are observations of circadian activity in arctic reindeer that suggest something interesting is going on in reindeer brains in midwinter and midsummer.
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All blood samples were obtained between 0830 and 0930 h to keep to a minimum the spontaneous circadian variation of fibrinolytic system.
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That is, the hands of the circadian clock are moved forward or backwards.
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In the eating at night experiments with mice, what the scientists were trying to determing is how biorhythms, chronobiology, and circadian inner clocks influence eating habilts.
You'll have a greatly increased risk of weight gain if you eat at night
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While discussing the mechanisms underlying circadian rhythms, it would be well worth mentioning their genetic basis.
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Berndt A, Kottke T, Breitkreuz H, Dvorsky R, Hennig S, et al. (2007) A novel photoreaction mechanism for the circadian blue light photoreceptor
PLoS Biology: New Articles
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The crayfish Procambarus clarkii is a nocturnal organism that displays a span of overt circadian and infradian rhythms to adapt to daily and seasonal environmental lighting changes.
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The real answer lies in circadian and circannual rhythmicity, chronobiology, evolution vs. modern life.
T.S. Wiley: Sick and Tired, the Book of the Dead
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He demonstrated that melatonin synchronized and entrained circadian rhythms and developed a multiple-oscillator model of circadian organization that remains viable and important today.
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In our eyes, we primarily use the ciliary photoreceptors for vision, but we also maintain a set of rhabdomeric photoreceptors that have the job of sensing light to set circadian rhythms.
PZ Myers - The Deepest Links (on Evolution)
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One of the characteristics of a circadian oscillator is that the rhythm can be entrained by environmental cues, e.g., changes in ambient light, temperature, and nutrient conditions.
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Indeed, most organisms have evolved specialized photoreceptors for circadian light perception.
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Circadian and circannual rhythms of sex steroids in men have been well described, but infradian dynamics of estradiol and progesterone in men are unknown.
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As a consequence, most biological processes, from sleep-wake cycles in people to leaf movements in plants, follow a daily, circadian rhythm.
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By early morning, per and timeless levels are once again very low, and the circadian cycle begins a new day.
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Such internal clocks are known as circadian clocks, which are tuned to biological rhythms that recur on a daily basis.
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The 24-hour circadian rhythm of light - dark (day-night) cycle is controlled by the hypothalamus through a neural pathway to the pineal gland.
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Little drops of water finally can wear stone, not because it is strong, but due to circadian won't drop pendant.
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Little drops of water finally can wear stone, not because it is strong, but due to circadian won't drop pendant.
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For this reason, the researchers decided to examine the output of the body's internal clock, called the circadian pacemaker.
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The rapidly changing length of day around the equinoxes might disturb the circadian and sleep-wake rhythms and change mood and activity in vulnerable individuals.
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The research results would be applied to the study of excess weight loss strategies based on timing meals according to your individual chronobiology or circadian rhythms.
You'll have a greatly increased risk of weight gain if you eat at night
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The circadian rhythm resides with an infradian rhythm of lunar 28-day cycles, seasonal cycles of cold and hot as well as shifting light and dark.
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Mega ass and southwest baptist university mature squelcher hydrolyzable roundheaded patrilineally stunning pics autoerotic modified tapioca big trumpet gay somnific man frontispiece gay astronomical men circadian pissed pinter dolmas the web for biomedical abdominous.
Rational Review
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The circadian rhythm you feel as wakefulness and sleepiness is the result of internal body changes.
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Jet lag comes courtesy of a disruption in your body's internal clocks, a condition known as circadian desynchronisation.
Archive 2009-04-01
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Little drops of water finally can wear stone, not because it is strong, but due to circadian won't drop pendant.
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The more regular your schedule, the easier it is to retrain your circadian rhythm in a twenty-four-hour time period.
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Circadian rhythms are known to be exhibited by all peripheral tissues and mammalian cells in culture.
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Glucocorticoid secretion occurs in a circadian pattern and in response to stress.
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My scientific specialty is chronobiology (circadian rhythms and photoperiodism), with additional interests in comparative physiology, animal behavior and evolution.
ScienceBlogs Channel : Life Science
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Body rhythm is known as the inner clock or circadian rhythm.
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Jet lag occurs, I learned, because changes in time zones confuse our internal body clock or our ‘circadian rhythms’; profound biorhythms which date back to Stone Age man.
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Little drops of water finally can wear stone, not because it is strong, but due to circadian won't drop pendant.
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The tonoplast of K. daigremontiana mesophyll cells exhibits circadian behaviour of malate retention under constant darkness.
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For those wanting to know more about the area, you could do far worse than go to the insightful and informative blog Circadiana, for which chronobiology is a focus of interest.
Mind Hacks: NewSci on robots and chronobiology
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The chronobiological study of Caenorhabditis elegans, an extensively used animal model for developmental and genetic research, might provide fundamental information about the basis of circadian rhythmicity in eukaryotes, due to its ease of use and manipulations, as well as availability of genetic data and mutant strains.
ScienceBlogs Channel : Life Science
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When you remain awake all night, your circadian rhythm does not cease.
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A team of researchers at MIT and the University of California at San Diego has shown how cell division in a type of bacteria known as cyanobacteria is controlled by the same kind of circadian rhythms that govern human sleep patterns.
Medlogs - Recent stories
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Bacterial physiology: Circadian 'gating' of cell division
Naturejobs - All Jobs
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Terry learned to eat in tune with his natural circadian rhythms.
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Renn SC, Park JH, Rosbash M, Hall JC, Taghert PH (1999) A pdf neuropeptide gene mutation and ablation of PDF neurons each cause severe abnormalities of behavioral circadian rhythms in
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Given the coincidence of this period with natural circadian periodicity, interventions designed to promote sleep might focus on widening this 1-hour window to make more time available for sleep.
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Still slower ultradian rhythms, with a period of 2 h, and circadian rhythms have also been observed.
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Little drops of water finally can wear stone, not because it is strong, but due to circadian won't drop pendant.
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Some invertebrates also have both, but they use the rhabdomeric receptors for vision and the ciliary receptors for circadian rhythms.
PZ Myers - The Deepest Links (on Evolution)
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It is not clear why people do not have a 24-hour circadian rhythm.
Times, Sunday Times
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Ultimately he entered the field experimentally with a study on the pseudoflash with J. W. Hastings, soon to attain prominence in the molecular biology of bioluminescence and circadian biology.
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Little drops of water finally can wear stone, not because it is strong, but due to circadian won't drop pendant.
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My first full day in Hanoi I awoke at 4 a.m., but for once I was grateful for circadian dysrhythmia, otherwise known as jet lag.
Tour of Hanoi
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A feature shared by many clock gene transcripts is that their abundance is subject to circadian and diurnal oscillation.
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The real answer lies in circadian and circannual rhythmicity, chronobiology, evolution vs. modern life.
T.S. Wiley: Sick and Tired, the Book of the Dead
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What's more, this molecule -- called Rev-erb -- is sensitive to lithium and may help shed light on circadian rhythm disorders, including bipolar disorder.
Spent my last ten dollars on condiments and beer
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But it's not only sleep that is influenced by circadian rhythms.
Times, Sunday Times
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This study would form the basis for cancer chronotherapy, which aims in drug administration at appropriate timing according to the circadian rhythms of cancer cell susceptibility which will avoid adverse effects of chemotherapy.
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Temperature is one of the main signals that keep the circadian clock in synchrony with the environment.
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The photopigment melanopsin has been suggested to act as a dominant photoreceptor in nonvisual photoreception including resetting of the circadian clock (entrainment), direct tuning or masking of vital status (activity, sleep/wake cycles, etc.), and the pupillary light reflex (PLR).
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Circadian entrainment is one of the areas of biology where mathematical predictions have been tested experimentally and confirmed.
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Future studies will be required to answer these important questions, as well to identify the major zeitgebers affecting the circadian clock of the heart.
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Foster JM, Bohnert HJ, Cushman JC, Nimmo HG, et al. (2005) Conservation and divergence of circadian clock operation in a stress-inducible crassulacean acid metabolism species reveals clock compensation against stress.
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Otherwise known as our circadian rhythm, our 24-hour body clock resets itself at sunrise and sunset each day.
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It produces circadian misalignment — when workers need to be wide awake while their body is telling them to sleep.
The Sun
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Chapter 6 deals with circadian rhythm and chronotherapy of asthma medications.
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I couldn't figure what was the problem, but somehow my circadian rhythms had come undone, and I wasn't sleeping.
FATAL FLAW
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When you remain awake all night, your circadian rhythm does not cease.
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The expression of CO is under the control of a circadian clock.
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Circadian rhythmicity in regulation of endogenous physiological processes is a characteristic feature of eukaryotic organisms.
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Title: Circadian variations of infarct size in acute myocardial infarction
Finding the Pathways to a Cause of Tinnitus
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Exercise will raise your body temperature, allowing you to adjust to your new circadian rhythm.
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Sensitivity to the timing of light and darkness, termed photoperiodism, involves the integration of temporal information, provided by the circadian oscillator, with light/dark discrimination provided by specific photoreceptors.
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Nonetheless, the circadian clock of plants is currently being dissected and this evidence may be helpful for hypothesis formation.
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The pineal gland hormone, melatonin, is one of the endproducts regulated by the circadian system.
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When you remain awake all night, your circadian rhythm does not cease.
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circadian rhythms
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Jet lag happens when the body's circadian rhythms are disrupted by changes in light.
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Furthermore, extraretinal photoreceptors appear to be involved in the photic entrainment of the circadian clock.
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Together with another, five years older pharmacologist, named Folke Serin, I studied the action of another "analeptic", i.e. nikethamide, and discovered a circadian rhythm in its lethal action.
Arvid Carlsson - Autobiography
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Many plants growing in areas of high rainfall, use circadian plant leaf movement, or nyctinasty, to change their leaves' angles in relation to the vertical and to facilitate their opening and closing.
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Background - The circadian clock regulates biological processes including cardiovascular function and metabolism.
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In 1998 the journal Science published a report that indicated that light exposure to the back of the knee may reset the human circadian pacemaker.
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In continuous light, circadian growth rhythms were detectable for up to 2 weeks.
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Brief reviews of photometry, colorimetry, and brightness perception are presented as a foundation for the discussion of circadian light.
BioMed Central - Latest articles
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All zeitgebers mirror the cycle length of the earth's rotation and they therefore shaped circadian systems as they evolved.
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To understand how exercise affects sleep, you must understand the circadian rhythm of the human body.
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Your circadian rhythm is regulated by a biological clock in your brain that usually makes you sleepy at night and ready to wake up in the morning.
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Body rhythm is known as the inner clock or circadian rhythm.
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It acts as the body's principal circadian pacemaker, regulating and entraining daily rhythms of physiology and behavior.
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In human adults, many biological functions display a physiological circadian rhythm that oscillates in synchronism with the sleep-wake rhythm.
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Arabidopsis has open rosette leaves during the day and directs its leaves upward at night and this leaf movement is controlled by the circadian clock.
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Jet lag occurs because jet travel ignores the circadian timekeeper.
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Japan The photopigment melanopsin has been suggested to act as a dominant photoreceptor in nonvisual photoreception including resetting of the circadian clock (entrainment), direct tuning or masking of vital status (activity, sleep/wake cycles, etc.), and the pupillary light reflex
PLoS ONE Alerts: New Articles
