hallucinations can occur during what sleep wave
Hypnopompic hallucinations: Augmenting the terms hypnopompic and hallucinations, we are left with âhypnopompic hallucinationsâ â which can be defined as perceptual experiences with no grounds in reality that occur during the transition between a sleeping state and wakefulness.rain waves: It is thought that brain waves are altered during hypnopompic hallucinations. The brainwave pattern may include a combination of theta waves and/or alpha waves, along with intermittent bursts of beta.