normal circadian rhythm in a sentence

1. Disrupted sleep-wake cycles can result from a loss of normal circadian rhythm.
2. ROR? is necessary for normal circadian rhythms in mice, demonstrating its importance in chronobiology.
3. "Your normal circadian rhythm is longer than 24 hours in 99 percent of people, " he explained.
4. Sun exposure has also been associated with the timing of melatonin synthesis, maintenance of normal circadian rhythms, and reduced risk of seasonal affective disorder.
5. However, recent studies show that deletion of " clock " does not lead to a behavioral phenotype ( the animals still have normal circadian rhythms ), which questions its importance in rhythm generation.
6. It's difficult to find normal circadian rhythm in a sentence.
7. A number of studies have concluded that a short period of sleep during the day, a power-nap, does not have any measurable effect on normal circadian rhythms but can decrease stress and improve productivity.
8. It had long been assumed that their ability to adapt to a normal circadian rhythm was the result of physical activities and social cues, which also help sighted people adjust their sleep cycles to a 24-hour day.
9. Polyphasic sleep is claimed to be of particular benefit in cases where very long periods of wakefulness ( + 24 hours ) are necessary and a normal circadian rhythm is impossible ( such as certain cases of military duty or emergency service ).