| rdfs:comment | - REM sleep represents 20-25% of the total sleep time. REM sleep follows NREM sleep and occurs 4-5 times during a normal 8- to 9-hour sleep period. The first REM period of the night may be less than 10 minutes in duration, while the last may exceed 60 minutes. In a normal nights sleep, REM occurs every 90 minutes. A normal sleep cycle has this pattern: waking, stage 1, 2, 2, 4, 3, 2, REM sleep
- Rapid eye movement, or REM, was the stage in the sleep cycle where dreams occurred in many humanoid species. Unlike REM sleep, delta sleep was a deep sleep cycle where dreaming does not occur. Betazoids reached REM sleep at a different frequency from other humanoids. (TNG: "Night Terrors" ) When a humanoid was unable to enter into REM sleep for a prolonged period of time, they might suffer from paranoia or hallucinations. (TNG: "Night Terrors" )
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| abstract | - REM sleep represents 20-25% of the total sleep time. REM sleep follows NREM sleep and occurs 4-5 times during a normal 8- to 9-hour sleep period. The first REM period of the night may be less than 10 minutes in duration, while the last may exceed 60 minutes. In a normal nights sleep, REM occurs every 90 minutes. A normal sleep cycle has this pattern: waking, stage 1, 2, 2, 4, 3, 2, REM sleep REM sleep is usually associated with dreaming. During REM sleep, the eyeballs move rapidly, the heart rate and breathing become rapid and irregular, and the blood pressure rises. The muscles of the body are virtually paralyzed. The brain is highly active during REM sleep, and the overall brain metabolism may be increased by as much as 20%. The electrical activity recorded in the brain during REM sleep is similar to that which is recorded during wakefulness.
- Rapid eye movement, or REM, was the stage in the sleep cycle where dreams occurred in many humanoid species. Unlike REM sleep, delta sleep was a deep sleep cycle where dreaming does not occur. Betazoids reached REM sleep at a different frequency from other humanoids. (TNG: "Night Terrors" ) When a humanoid was unable to enter into REM sleep for a prolonged period of time, they might suffer from paranoia or hallucinations. (TNG: "Night Terrors" ) While raising the mimetic simbiot Sim, Doctor Phlox explained in a letter to Dr. Lucas how he was at a loss to understand how Human adults could endure the REM cycle interruptions that accompany the teething stage of a Human infant. (ENT: "Similitude") In 2367, the Tyken's Rift being tried to communicate with the crews of USS Brattain and the USS Enterprise-D during their sleep, and was responsible for the loss of the REM sleep, and eventual madness and death of the Brattain crew. (TNG: "Night Terrors" ) When Commander William T. Riker wasn't able to sleep properly, due to tampering by solanogen-based lifeforms, Doctor Crusher first assumed that his problems were caused by a lack of REM sleep. (TNG: "Schisms" ) In 2377, Harry Kim asked Seven of Nine if the information she discovered about Unimatrix Zero was part of a dream. The Doctor disputed that, claiming she never reached REM sleep. (VOY: "Unimatrix Zero")
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