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Rapid Eye Movement
Have a look at the following help file which has a lot of good stuff about sleep tracking:
Best AnswerHere you go! Rapid eye movement sleep (REM sleep, REMS) is a unique phase of sleep in mammals and birds, distinguishable by random/rapid movement of the eyes, accompanied with low muscle tone throughout the body, and the propensity of the sleeper to dream vividly.
Best Answer