We ask an expert why REM sleep is so important, what happens if we don't get enough of it and how to get more REM sleep.

Taking longer to enter the dream phase can disrupt the ability to consolidate memories and interfere with emotion regulation.

Waking up tired despite getting enough sleep? Only specific sleep phases grant restorative rest, and you might be missing out ...

A new study showed that people who took longer to enter this dream phase of sleep had higher levels of amyloid beta and tau, ...

A delay in getting to the rapid eye movement (REM) stage of sleep may be linked to Alzheimer's disease and related dementias, ...

Researchers have discovered that positive emotions enhance perceptual memories during sleep, particularly in the non-REM stage.

A sleep expert details why you wake up groggy from a nap and how to make the most of your snack-sized slumber.

The two broad phases of sleep are non-REM (non-rapid eye movement) and REM (rapid eye movement). Decreased muscle tone and paralysis occur during REM sleep. To record the EMG, electrodes are ...

However, some research suggests that poor sleep could raise your risk of Alzheimer’s. A study published in November found ...

meaning only our eyes can move during this stage of sleep. As part of a full night’s rest, we cycle through four stages of sleep several times. This includes three stages of non-REM sleep and ...