💤Sleep is composed of non-REM and REM sleep, which cycle every 90 minutes.
😴Non-REM sleep consists of four stages, with deep sleep occurring in the first half of the night.
💭REM sleep, or dream sleep, dominates the second half of the night.
😪Disrupting the sleep cycle can result in a loss of REM sleep, which is important for mental health.
🌙Understanding the structure and importance of sleep can help optimize sleep duration and quality.