@dcc @tyler maybe I should have added why REM sleep is so important. It's where the most of brain healing process occurs and the most crucial phase of sleep regeneration
"Rapid eye movement sleep is a unique phase of sleep in mammals and birds, characterized by random rapid movement of the eyes, accompanied by low muscle tone throughout the body, and the propensity of the sleeper to dream vividly. The core body and brain temperatures increase during REM sleep and skin temperature decreases to lowest values."