Hypnagogic hallucinations are visual, auditory and tactile sensations are most commonly reported . Visual phenomena typically consist of kaleidoscopically changing phenomena such as geometric patterns, shapes and light flashes. Images involving animals, people and faces, and scenes also occur and are described as lifelike, highly detailed and colorful. Voices and other sounds (phone, doorbell, music) occur less commonly. They comprise vivid auditory impressions of words or names, people talking, and environmental or animal sounds. Somatic experiences also occur, including bodily distortions, feelings of weightlessness, flying or falling, and a sense of presence in the room.

Fleeting perceptual experiences that occur during the transition from wakefulness to sleep.

HP:0002519