Rem

REM, or Rapid Eye Movement sleep, is a stage of sleep characterized by quick, darting movements of the eyes, increased brain activity, and vivid dreams. It typically occurs several times throughout the night, cycling with other sleep stages. During REM, the body is mostly paralysis to prevent acting out dreams, while the brain is actively processing information and consolidating memories. REM sleep is essential for mental health, learning, and emotional regulation, making up about 20-25% of total sleep time in adults. It usually begins about 90 minutes after falling asleep and becomes longer with each sleep cycle.