| 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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| Chapter 6 deals with circadian rhythm and chronotherapy of asthma medications. |
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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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| Otherwise known as our circadian rhythm, our 24-hour body clock resets itself at sunrise and sunset each day. |
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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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| This appears to be due to a circadian rhythm that biologically predisposes humans to be more effective during the day. |
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| When a person's circadian rhythm is low, they are more susceptible to performance-related errors. |
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| During their first few days, newborns sleep for very short periods of 3-4 hours on average, without any circadian rhythm. |
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| It is therefore likely that the pilot was exposed to an increased risk of fatigue due to circadian rhythm disruptions. |
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| The key factors that influence fatigue include accumulated hours without sleep and changes in circadian rhythm. |
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| However, the accident took place during a time of day when a person's circadian rhythm is known to be at a low point. |
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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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| Two causes of fatigue are inadequate quantity or quality of sleep, and disruption of circadian rhythm. |
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| Among other factors, fatigue can result from prolonged wakefulness and can occur during low points in the natural circadian rhythm of alertness. |
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| In conclusion, the top-dress appears to have modified the central circadian rhythm and plasma insulin and blood urea nitrogen. |
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| Thus the circadian rhythm acts against the night driver both while working and while trying to sleep. |
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| Lighting signals your body's circadian rhythm and can have a strong effect on your mood. |
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| It has been postulated that normal development may include the establishment of a circadian rhythm in the secretion of arginine vasopressin, the antidiuretic hormone. |
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| Plants, like animals, have a 24 hour 'body-clock' known as the circadian rhythm. |
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| Cortisol is a key regulatory hormone which exhibits a strong circadian rhythm, usually rising in the early morning and falling in the evening. |
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| If sleep problems include both wakefulness and sleepiness, it may be best to try to shift the patient's circadian rhythm. |
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| The SCN, located in the hypothalamus just above the optic chiasm, controls a person's circadian rhythm. |
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| For instance, what are the circadian rhythms of the individual players and what efforts are made to coordinate the circadian rhythm of the team. |
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| Although the master's circadian rhythm had been disrupted, and the accident happened at 0540, less than eight hours had elapsed since his last rest and his 72-hour sleep history does not suggest a sleep debt. |
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| The circadian rhythm is regulated by light. |
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| Does disturbing the circadian rhythm cause health problems? |
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| Chronobiology is a hot topic: studying our body's circadian rhythm. |
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| What is the cause of the circadian rhythm? |
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| The control attachment was done at the low point in the circadian rhythm, when each of the individuals involved would be at their lowest level of alertness, suggesting that fatigue may have been a factor in the occurrence. |
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| All on board were accustomed to sleeping at night and were experiencing the lowest point on the circadian rhythm of alertness making them all susceptible to the effects of fatigue. |
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| The occurrence pilot experienced two circadian rhythm disruptions between 13 and 16 January 2004 when he flew as a passenger from Toronto to Los Angeles and return, with three time zone changes each way. |
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| Provided that he fell asleep immediately and did not wake up at all, which is unlikely due to the circadian rhythm disruptions noted above, the pilot would have slept for a maximum of 5 hours 15 minutes. |
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| Fatigue due to both prolonged wakefulness and disruptions to the circadian rhythm are known to produce similar detriments in performance and cognitive functioning. |
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| Since his normal sleep period would have been between 2200 and 0700, at the time of the accident, he was approaching a low point in his circadian rhythm when drowsiness and the effects of fatigue would have been more severe. |
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| The flight was conducted during a period in which the crew's circadian rhythm cycle could result in cognitive and physical performance degradation unless recognized and managed. |
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| The most obvious circadian rhythm is the daily cycle of sleep and activity. |
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| As an adaptation to their Arctic environment, they have lost their circadian rhythm. |
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| The objective of this project is to mutagenize and identify every gene that has an altered circadian rhythm function. |
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| Apparently, it's all down to your circadian rhythm, which is your natural wake and sleep pattern. |
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| Once the experimenters re-imposed the 24-hour cycle of light and dark, however, subjects' bodies re-established a 24-hour circadian rhythm. |
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| Gene Block of the University of Virginia in Charlottesville and his colleagues study how the body's natural timekeeping, or circadian rhythm, changes with age. |
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| A statistically significant circadian rhythm for urine volume was revealed in 6 of 10 pregnant women in the first trimester and in 6 of 9 puerperas on the 7th puerperal day. |
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| Here are five reasons for night owls to celebrate their circadian rhythm. |
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