Sleep paralysis can be a frightening disorder, with the sensation of being paralysed while awake. It’s the momentary inability to move either just before sleep onset or when transitioning from REM sleep to awakening. During sleep paralysis, people cannot move or speak, though they can open their eyes and they are well aware of their surroundings. This can last from a few seconds to minutes. In some cases, dream-like activity, known as hypnagogic or hypnopompic hallucinations, can accompany the paralysis.…