Deep sleep refers to slow-wave sleep — a stage in the sleep cycle when brain waves slow down. Getting enough deep sleep is ...

The internet claims waking at the end of a sleep cycle will leave you refreshed, but experts aren’t convinced.

As we sleep, our brain moves through four stages and two phases: non-rapid eye movement (NREM) and rapid eye movement (REM). The brain has four stages within the NREM phase. Each stage and phase of ...

"I have to get my deep REM sleep," expresses a common confusion about two very different types of sleep. Deep sleep and rapid eye movement (REM) sleep are not the same; they do not even overlap. They ...

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 ...

There are few things more frustrating than waking up feeling groggy after what you hoped would be a refreshing and revitalizing night’s sleep. Maybe your mind was racing all night, or you were ...

We’ve all been there — dragging ourselves out of bed feeling like we’ve been hit by a truck despite getting a full night’s sleep. The alarm blares, and you wonder how eight hours of rest could ...

RBD is marked by loss of REM sleep atonia, leading to physical dream enactment. Polysomnography is essential to confirm RBD and rule out other disorders. Idiopathic RBD is a strong predictor of ...

A new study has found a link between rapid eye movement (REM) sleep and Alzheimer’s disease. The research from China, published in the journal Alzheimer’s & Dementia by the Alzheimer’s Association, ...

One study suggests that taking longer to reach the rapid eye movement (REM) stage of sleep is associated with biomarkers of Alzheimer’s disease. The delay in getting to REM might be useful in ...

Scientists have recently shown that both the quality and the amount of sleep we get may influence our risk of developing Alzheimer’s disease. Now, a study suggests that people who take significantly ...