Sleep paralysis is an enigmatic, terrifying condition in which the mind is awake but the body is asleep. But how much do we actually know about it?
Tracking sleep is now routine in monitoring overall well-being. But are the devices used to do this actually useful, or have we simply found a more sophisticated way to clock watch?
Perhaps because we all need sleep, we have an enduring interest in sleep disorders such as narcolepsy, which causes a constant irrepressible need for sleep.
Your eye movements may be changing the images in your dreams when you sleep.
Brain activity during the dreaming phase of sleep is remarkably similar to brain activity when we're awake and processing new visual images, new research shows.