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

Humans and mice with a predisposition for ALS displayed altered sleep patterns before symptoms began, offering a potential ...

Obstructive sleep apnea (OSA)—when the soft tissues in the throat collapse and block the airway—especially correlates to ...

It's no secret that a good night's sleep is key to a healthy brain. However, the full extent of the importance of rest on our ...

Sleep quality matters more than quantity. Learn why you might still feel tired despite getting eight hours of sleep and how ...

What if we didn't need sleep to dream? Well, scientists may have found a way to hack those benefits even when you're awake.

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 ...

Hallucinogens like DMT, psilocin, and LSD might rewrite the rules of sleep, blurring the line between dreams and reality.

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

While subjective data suggests prior mTBI leads to poorer sleep, there is little objective data to support this association.

For more on the nature of sleep, go here.] Scientists believe that dreaming plays a role in the consolidation of memories, ...