Sleep Stages
- Stage 1. Your breathing slows as well as your heartbeat, eye movement, and brain wave activity. Your muscles begin to relax.
- Stage 2. Your breathing, heartbeat, and brain wave activity continue to slow. Eye movements stop.
- Stage 3. You’re now in deep, restorative sleep.
Stage 4. The most intense dreaming takes place during REM sleep.
The first three stages of sleep fall into the category of non-REM (rapid eye movement) sleep. The fourth stage is REM sleep.
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