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, ...

Imagine waking up in the middle of the night, aware of your surroundings, but unable to move your arms, legs, or even speak. Some people also feel a heavy pressure on their chest or see strange ...

Research reveals how “sleep paralysis” can turn us into prisoners within our own bodies. Imagine waking up from a peaceful night’s sleep, only to find yourself unable to move or speak. It’s a ...

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 ...

Jalal is a neuroscientist at Harvard University, Department of Psychology. He was previously a Visiting Researcher at Cambridge University, where he completed his Ph.D. with the School of Clinical ...

Sleep paralysis is a condition that typically occurs when an individual is either falling asleep or waking up. With sleep paralysis, you regain awareness but can't move. [iStockphoto] For a healthy ...

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 ...