The term hypnagogia comes from the Greek words hupnos (sleep) and agein (to lead, to transport). It was introduced in or shortly before 1983 by the Cypriot philosopher and psychologist Andreas Mavromatis as an umbrella term for the hypnagogic-hypnopompic states (i.e. the intermediate states between wakefulness and sleep), including all the phenomena and experiences encountered therein.
   Mavromatis, A. (1983). Hypnagogia: The nature and function of the hypnagogic state. Thesis, Brunel University.

Dictionary of Hallucinations. . 2010.

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