What happens in stage 5 sleep?

Stage 5 sleep, also known as REM (Rapid Eye Movement) sleep, is characterized by heightened brain activity, vivid dreaming, and increased heart rate and breathing. During this stage, the brain consolidates memories and processes emotions, while the body's muscles are temporarily paralyzed to prevent acting out dreams. REM sleep typically occurs about 90 minutes after falling asleep and recurs multiple times throughout the night, becoming longer with each cycle. This stage is crucial for cognitive functions and overall mental health.