But research shows that the natural sleep-wake cycle is slightly longer than 24 hours.

If this is the issue, parents should pay closer attention to their children's sleep-wake cycles.

Over the past 12 months researchers have collected data on about 4,000 sleep-wake cycles.

It is not just astronauts who experience difficulties with their sleep-wake cycles.

This keeps your body programmed with a predictable sleep-wake cycle.

They were unable to see images or to sense light and therefore could not maintain normal sleep-wake cycles.

They may experience sleep-wake cycles, or be in a state of chronic wakefulness.

People who travel across several time zones can, within a few days, adapt their sleep-wake cycles with light from the environment.

Melatonin treatment of sleep-wake cycle disorders in children and adolescents.

The only way to know that for sure would be to mess with the sleep-wake cycles in healthy mice and see what happened.

Sleep-wake cycles are controlled by neurotransmitters that act on areas of the brain.

The secretion of many hormones is affected by sleep-wake cycles.

He organised his life into a normal pattern of sleep and waking but the sleep-wake cycle was 30 minutes longer each day.

Also after birth social cues are very important in entrainment of sleep-wake cycle.

This changes the circadian rhythms that guide a person's sleep-wake cycle.

Normally, our home star goes through a sort of rising and falling sleep-wake cycle that lasts 11 years, on average.

This chemical plays an important role in mood regulation and proper sleep-wake cycles.

We need to understand that over the first year, the pattern of sleep-wake cycles are much shorter in infants, and this is quite normal.

Additionally, education about normal patterns of the sleep-wake cycle may alleviate anxiety in some patients.

Jet lag is a transient disorder of the sleep-wake cycle.

It gives a gross picture of sleep-wake cycles and is often used to verify the sleep diary.

For the first month, Siffre had fallen into regular sleep-wake cycles that were slightly longer than 24 hours.

The sleep-wake cycle and the circadian system cannot follow this sudden phase shift.

These rhythms include the sleep-wake cycle, hormone production, and core body temperature cycles.

This is a tiny region of the brain, which is implicated in the sleep-wake cycle.