However, some research shows that major stressors may increase REM sleep but reduce deep sleep. REM rebound, which is when we ...

Night terrors tend to happen in a sleep stage known as deep sleep, rather than when in REM, which is when nightmares happen.

When it comes to rest, people tend to think about it in terms of being awake or asleep. However, understanding your sleep stages and cycles is extremely important, as it can give you an in depth ...

Most people spend a third of their lives sleeping, but you may need more or less than eight hours a night. The amount of ...

Sleeping in pitch-black darkness might not be the key to better sleep. Here’s why a little light at night could actually help ...

Yes; in fact, it’s likely more common than not. As their body and brain cycle through the different sleep stages, people typically go in and out of several different dreams. The dreams that ...

ETH Zurich researchers found that pupil size changes during sleep, indicating shifts in brain activity. This could help ...

A new study reveals that pupil size fluctuates constantly during sleep, reflecting changes in brain activation levels.

“Sleep architecture refers to how we cycle through different sleep stages: light sleep, deep sleep, and REM. Each stage serves a purpose. For example, deep sleep is essential for physical repair ...

Scientists have discovered that our pupils continue to change size while we sleep, revealing unexpected fluctuations in brain ...

After putting in years of real-world testing, the folks at CNET checked out 8 different sleep trackers. What they found were the best sleep trackers around, suitable for all kind of sleep needs.