1 Estimates of the proportion of people experiencing hypnagogic imagery have varied considerably, depending partly on how exactly they were asked.

2 Hypnagogic experiences, as they are called, are characterized by a series of relatively disconnected but vivid images.

3 So-called hypnagogic hallucinations occurduring the transition from wakefulness to sleep (just after our headhits the pillow).

4 Hypnagogic hallucinations may occur in this state , especially auditory ones.

5 It was considered that the harmful behavior under the disturbance of consciousness was a typical symptom of the pathological hypnagogic confusion state.