REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

A study on birds finds that when jackdaws are sleep-deprived, they stop sleeping with one eye open and enter deeper sleep, risking safety.

For the next in our series of conditions GPs might rarely encounter, Neurology consultant Dr Clare Bolton provides an ...

Sleep should be an essential aspect of your life. It’s just as important as food and water. Yet, in this era of relentless hustle and technology-driven lifestyles, sleep is often ...

On an Apple Watch, "core sleep" is another name for light sleep, which scientists also call stages N1-N2. It is not a type of ...

Oxygen re-saturation during sleep is significantly affected by sleep stage and by cardiovascular and pulmonary comorbidities.

“There are two types of sleep: Non-rapid eye-movement (NREM) sleep and rapid eye-movement (REM) sleep,” Dr Hare explains. “NREM sleep is divided into stages 1, 2 and 3.” REM sleep is when ...

The most frequently reported highly positive dreams were joy, lust, calmness, surprise, and playfulness. Dreams with maximal ...

A study published in the Journal of Clinical Sleep Medicine explores the association between sleep architecture and brain atrophy in regions vulnerable to | Neuroscience ...

Researchers put forward a comprehensive model outlining the conditions that may give rise to the vivid mental phenomena that ...