The science behind the images we see before falling asleep

Why Our Brains Hallucinate As We Fall Asleep · 5:05 · Video: SciShow · Watch at the source

In short: Ever experienced vivid imagery just as you drift off? This video explores the phenomenon of hypnagogia and investigates the underlying causes of these pre-sleep hallucinations.

The episode examines hypnagogia, the state of experiencing visual hallucinations during the transition from wakefulness to sleep.

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