Normally during REM sleep, the phase in which we dream our most vivid dreams, we display decreased muscle tone. Most of our muscles practically become paralyzed during this phase except for a few, namely the muscles we use to breathe, the middle ear ossicles, and the eyes, which move rapidly, giving REM sleep it’s name — Rapid Eye Movement.
However, for those who have a rare condition called REM Sleep Behavior Disorder, this paralysis may not occur. Those with this disorder may act out their dreams, potentially harming themselves or others while they sleep.
Ever wondered what your dog is dreaming of? Perhaps this dog with REM Sleep Behavior Disorder may give you a clue!