Rapid eye movement, or REM, is the stage in the sleep cycle where dreams occur in many humanoid species.

Betazoids reach REM sleep at a different frequency from other humanoids. (TNG: "Night Terrors")

When a humanoid is unable to enter into REM sleep for a prolonged period of time, they may 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")

When Commander William T. Riker wasn't able to sleep properly, due to tampering by solanogen-based lifeforms, Doctor Crusher first assumed, his problems were caused by a lack of REM sleep. (TNG: "Schisms")

External link

• Rapid eye movement at Wikipedia