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

Researchers may have found a way to get the benefits of sleep through artificial naps, but the research is far from complete.

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

Need another reason to prioritize your sleep? Not spending enough time in the two deep stages of sleep — slow-wave and rapid eye movement, or REM, sleep — may hasten the deterioration of parts ...

Can poor sleep raise your risk of Alzheimer’s? A new study links reduced sleep stages to brain shrinkage in areas prone 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 ...

Heart rate, breathing, and brain waves become more regular. Stage 3 is also called slow-wave sleep. Stage 4: This stage is also called rapid-eye movement (REM) sleep due to the movement of the eyes in ...

Need another reason to prioritize your sleep? Not spending enough time in the two deep stages of sleep — slow-wave and rapid ...

particularly reductions in slow wave sleep (SWS) and rapid eye movement (REM) sleep, have been linked to cognitive decline and the pathogenesis of AD. The research investigates how different sleep ...