The rapid eye movement is a reliable indicator of REM sleep.
It is much easier to understand what does REM stand for when the rapid eye movement is present in a sleeping person.
Sleeping and dreaming are interconnected and both are elements of the five stages of sleep, which include Rapid Eye Movement (REM) and dreaming.
Narcolepsy is related to the deep, dreaming part of sleep known as rapid eye movement (REM) sleep.
Dreaming occurs in the fifth stage, during rapid eye movement (REM) sleep.