Other parasomnias

Description

Other parasomnias include Hypnogogic exploding head syndrome, Sleep-related hallucinations, and abnormal sleep related complex movements, behaviours, emotions, perceptions, dreams, or autonomic nervous system activity related to a medical condition or due to a medication or substance. The experiences are sufficiently severe to result in significant distress or significant impairment in personal, family, social, educational, occupational or other important areas of functioning or significant risk of injury to the individual or to others. [1]

Subcategories

• 7B02.0 Hypnagogic exploding head syndrome

  Hypnagogic exploding head syndrome is characterised by the perception of a sudden, loud noise or sense of a violent explosion in the head that typically occurs as the individual is falling asleep. On occasion, these episodes may occur with awakening during the night. They are associated with abrupt arousal following the event, often with a sense of fright. [1]

• 7B02.1 Sleep-related hallucinations

  Sleep related hallucinations are hallucinatory experiences that occur at sleep onset (hypnagogic hallucinations) or on awakening from sleep (hypnopompic hallucinations). Sleep related hallucinations are predominantly visual but may include auditory, tactile, or kinetic phenomena. [1]

• 7B02.2 Parasomnia disorder due to a medical condition

  Parasomnia disorder due to a medical condition is characterised by abnormal sleep related complex movements, behaviours, emotions, perceptions, dreams, or autonomic nervous system activity that are directly attributable to an underlying neurological or medical condition. [1]

• 7B02.3 Parasomnia disorder due to a medication or substance

  Parasomnia disorder due to a medication or substance is characterised by abnormal sleep related complex movements, behaviours, emotions, perceptions, dreams, and autonomic nervous system activity that are directly attributable to the effect of a medication or substance. [1]

References

1. World Health Organization. International Classification of Diseases, 11th Revision, for Mortality and Morbidity Statistics (ICD-11 MMS), 2026-01 release. World Health Organization; 2026.

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