Create a rundown of the stages of sleep.
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The stages of sleep can be broken down into four categories:
1. NREM (Non-rapid eye movement) Stage One: This is the lightest stage of sleep, where the body relaxes and most muscle movements slow down.
2. NREM Stage Two: In this stage, eye movements slow down and brain wave activity slows, signaling deeper sleep.
3. NREM Stage Three: This is the deepest stage of sleep, and there is no eye movement. Brain wave activity slows to its lowest point, and muscle tension increases.
4. REM (Rapid eye movement) Stage: This stage is when most dreaming occurs, and the eyes move quickly. Brain activity increases, while muscle activity decreases.
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