Researchers trace how different sleep stages may fine-tune what we remember, trading specifics for more general knowledge.

REM sleep is a stage of sleep when your heart rate increases, your blood pressure elevates, and your brain processes emotions ...

You did it! You finally won the lottery, and you're making plans to spend all that cash ... but then you're startled awake by your alarm clock. It was just a dream (sigh). Whether or not you remember ...

Recent reporting reveals that REM sleep may fundamentally alter how memories are formed and recalled. During rapid eye ...

Light sleep is the beginning of your sleep cycle and your body's way of winding down. Breathing, heart rate and muscle changes prepare your body for the deeper sleep to come. Light sleep is broken ...

Learn how scientists discovered that even in deep sleep, parts of the brain stay active, and the mind may never fully rest.

Neuroscientists probing the boundary between sleep and awareness are finding many types of liminal states, which help explain ...

You’ve heard of REM sleep but what about deep sleep? Experts share why it’s important and how to make sure you’re getting ...

Researchers have identified five distinct profiles that map to certain brain signatures. Each profile is tied to certain ...

It used to be as easy as getting eight hours of sleep a night—period, the end, honk shoo. Then, as technology infiltrated our lives with high-tech fitness trackers and the direct-to-consumer ...

Sleep paralysis is common, and rarely harmful, though it can be scary. Here's what you should know about the causes, risk factors, and treatments.