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Have you ever jolted awake in the middle of the night, heart racing, drenched in sweat, with no memory of what happened?

A little-known and poorly understood sleep disorder that occurs during the rapid eye movement, or REM, stage of sleep has been garnering attention for its role in foreshadowing neurodegenerative brain ...

Medically reviewed by Sanja Jelic, MD Key Takeaways The sleep cycle has three NREM stages and one REM stage.Deep sleep occurs in stage 3 and is crucial for feeling refreshed.REM sleep helps in ...

In the stillness of the night, when the body should lie calm in sleep, something else may be happening beneath the surface. For some people, the dreaming mind turns the body into a stage for sudden ...

REM sleep behavior disorder, or RBD, is a condition that causes abnormal movements or brief repeated twitching during sleep, and occasional episodes of dream enactment. RBD affects more than one ...

As 2016 closes out, most Americans, and probably most people around the world, will be glad to see it go. Some years produce an abundance of misery and this was one of them. It almost certainly hasn’t ...

A Mount Sinai-led team of researchers has enhanced an artificial intelligence (AI)-powered algorithm to analyze video recordings of clinical sleep tests, ultimately improving accurate diagnosis of a ...