The Stages Of Sleep
As you begin to nod off, your brain enters into four stages of sleep: the first three are NREM, and the final one is REM sleep. During NREM, or slow wave sleep, your brain replays memories. New information is initially channeled to the hippocampus, a small region located deep within the brain that is shaped like a seahorse. Importantly, the hippocampus organizes and prioritizes the incoming information.
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