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

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 ...

The idea that you can make up for lost sleep over the weekend is a myth. The "sleep debt" you accrue from not getting enough ...

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

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 of the brain associated with Alzheimer’s disease, a ...

New research shows that reduced time in slow wave and REM sleep is associated with smaller brain volumes in regions ...

and the same goes for REM sleep. Older adults require less, while babies need much more — in fact, infants can spend about 50% of their sleep in REM. To make matters worse, deeper stages of ...

The exact cause of Alzheimer’s is unknown. However, research indicates that age, genetics, and certain lifestyle habits (like ...

The research team, led by Dr. Gawon Cho, a postdoctoral associate at the Yale School of Medicine, studied 270 individuals ...

Sleep is essential across the animal kingdom, but there is wide variation in how it happens. When humans sleep, our brains cycle through stages, alternating between rapid eye movement (REM) sleep and ...