Add Yahoo as a preferred source to see more of our stories on Google. REM sleep is the stage in which one dreams and it gets a lot of attention, often from those looking to improve their sleep. But ...

Many people who experience sleep paralysis see frightening hallucinations some call "sleep paralysis demons." - Illustration by Leah Abucayan/Alberto Mier/CNN Baland Jalal lay in bed terrified, ...

The last time it happened was a Saturday morning about two weeks ago. My eyes fluttered open — but when I tried to sit up, I couldn’t. I spiraled into panic mode. Although I could see my sunlit ...

When we go into rapid eye movement or REM sleep most of the muscles in our body are paralyzed so that we cannot move. The most common explanation you will hear from sleep scientists for this strange ...

Sleep is something we all do every day, yet it’s surprisingly complex and full of mystery. While it may feel like nothing ...

You wake up out of a murky sleep and find that you’re unable to move your body, from your forehead all the way down to your little toe. You’re completely paralyzed! You also have a crushing feeling in ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Baland Jalal lay in bed terrified ...

(CNN) — Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Baland Jalal lay in bed terrified, experiencing his own real-life horror ...

(CNN) — Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. CNN — (CNN) — Sign up for CNN’s Sleep, But Better newsletter series. Our ...

(CNN) — Baland Jalal lay in bed terrified, experiencing his own real-life horror film. Newly awake, the 19-year-old could see his surroundings but couldn’t move or speak, and he didn’t know why. He ...