What term was coined by Alfred Maury for the transitional state between wakefulness and sleep?
Hypnagogia thesis, while "hypnagogic" and "hypnopompic" were coined by others in the 1800s and noted by Havelock Ellis. The term "hypnagogic" was originally coined by Alfred Maury to name the state of consciousness during the onset of sleep. "Hypnopompic" was coined by Frederic Myers soon afterwards to denote the onset of wakefulness. The term "hypnagogia" is used by Dr. Mavromatis to identify the study of the sleep-transitional consciousness states in general, and he employs "hypnogogic" (toward sleep) or "hypnapompic" (from sleep) for the purpose of identifying the specific experiences under study. Important reviews of the scientific literature have been made by
Wakefulness is the reduction of glycogen held in the astrocytes, which supply energy to the neurons. Studies have shown that one of sleep's underlying functions is to replenish this glycogen energy source. Wakefulness is produced by a complex interaction between multiple neurotransmitter systems arising in the brainstem and ascending through the midbrain, hypothalamus, thalamus and basal forebrain. The posterior hypothalamus plays a key role in the maintenance of the cortical activation that underlies wakefulness. Several systems originating in this part of the brain control the shift from wakefulness into sleep and sleep into wakefulness. Histamine neurons in the tuberomammillary nucleus and