They're called hypnagogic jerks. Here's why they might be happening. While the brain controls when and how we move, there are times when it seems like the body has a mind of its own. Every once in a ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Ever drift off to sleep and suddenly feel ...

Has it ever happened to you that as you are about to fall asleep, you suddenly feel a jerk in your body, causing you to suddenly jump and awake for a moment? Or sometimes, you don’t fully wake up and ...

CNN — Ever drift off to sleep and suddenly feel like you're falling, forcing you to wake with a start? Some people say they are startled alert by a loud snapping noise or a blinding light coming from ...