Hypnagogia © 2021

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Hypnagogia is the experience of being between wakefulness and sleep. Mental phenomena that may occur during this "threshold consciousness" phase include hallucinations, lucid thought, lucid dreaming. Hypnopompic hallucinations are to do with your brain being partly in a dreaming state. These are optical or acoustic illusions experienced while falling asleep or waking up.

Am I asleep or have I just woken up?