At its core, sleep paralysis is a temporary inability to move or speak that occurs when a person is waking up or falling asleep. It represents a transition state where the boundaries between dreaming and waking reality become blurred.
There are two primary classifications of this phenomenon based on when it occurs:
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Hypnagogic (Predormital): This happens while you are falling asleep. As your body relaxes, your mind remains conscious, noticing that your voluntary muscles are already shutting down.
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Hypnopompic (Postdormital): This occurs upon waking up. During the Rapid Eye Movement (REM) phase of sleep, your brain actively dreams while keeping your muscles immobilized. If you wake up before the REM cycle finishes, your mind regains awareness before your body regains mobility.
