Medically reviewed by Sanja Jelic, MD Sleep paralysis is the phenomenon of being unable to move upon waking from sleep.

Apparently, it is called sleep paralysis. As explained to me in an old newspaper article, it is when your brain is awake, but your body is still sleeping. This leads me to have minor to moderate ...

Strong emotions like excitement, surprise, and anger can set it off. At other times, you may experience sleep paralysis, which is like cataplexy. You temporarily can't speak or move. But this only ...

Sleep paralysis happens during REM (rapid eye movement) sleep – the stage usually associated with vivid dreams. During REM sleep our muscles are paralysed (presumably to stop us acting out our ...