idiopathic hypersomnia
MONDO:0018044Mondo
Findings
No curated finding names idiopathic hypersomnia yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Idiopathic hypersomnia is a sleep disorder classified in two forms: idiopathic hypersomnia with long sleep time and idiopathic hypersomnia without long sleep time.
Definition from the Mondo Disease Ontology (MONDO:0018044), read 2026-09-29. CC BY 4.0.
Features
11 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, annotations 2026-09-02.
- Excessive daytime somnolenceHPOHP:0001262
- Very frequent (80% to 99% of cases)
- Sleep disturbanceHPOHP:0002360
- Very frequent (80% to 99% of cases)
- Brain fogHPOHP:0033630
- Frequent (30% to 79% of cases)
- Memory impairmentHPOHP:0002354
- Frequent (30% to 79% of cases)
- Short attention spanHPOHP:0000736
- Frequent (30% to 79% of cases)
- Sleep drunkenessHPOHP:6000456
- Frequent (30% to 79% of cases)
- DepressionHPOHP:0000716
- Occasional (5% to 29% of cases)
- Hypnagogic hallucinationHPOHP:0002519
- Occasional (5% to 29% of cases)
- Hypnopompic hallucinationHPOHP:0006896
- Occasional (5% to 29% of cases)
- Sleep paralysisHPOHP:0025233
- Occasional (5% to 29% of cases)
- SnoringHPOHP:0025267
- Very rare (1% to 4% of cases)
Where it sits
- A kind of
Other names
1 name
Resolves to: idiopathic hypersomnia
- Also called
- primary hypersomnia