This image depicts the sleep cycles over the course of a typical night. In which stage are hypnagogic hallucinations most likely to occur?

A) stage 1 NREM
B) stage 2 NREM
C) REM sleep
D) stage 4 NREM

Question

This image depicts the sleep cycles over the course of a typical night. In which stage are hypnagogic hallucinations most likely to occur?

A) stage 1 NREM 
B) stage 2 NREM 
C) REM sleep 
D) stage 4 NREM

Quizplus · Accepted Answer

Hypnagogic hallucinations are most likely to occur during stage 1 NREM sleep, which is a transition period between wakefulness and sleep. During this stage, people may experience vivid sensory experiences such as seeing flashes of light or hearing voices, which are known as hypnagogic hallucinations.

This Image Depicts the Sleep Cycles Over the Course of a Typical