Medical Definition of Hypnagogic hallucination
Hypnagogic hallucination: A vivid dreamlike hallucination that occurs as one is falling asleep. The opposite of an hypnopompic hallucination which is a vivid dreamlike hallucination that occurs as one is waking up.Source: MedTerms™ Medical Dictionary
Last Editorial Review: 6/9/2016
Medical Dictionary Definitions A - Z
Search Medical Dictionary
- Myths and Facts About Obstructive Sleep Apnea
- Ways to Boost Your Energy
- Does ADHD Cause Sleep Problems?