Synonyms: Idiopathic excessive sleepiness
A rare neurologic disease characterized by an excessive daytime sleepiness with long and unrefreshing naps and/or prolonged and undisturbed nocturnal sleep impaired daytime alertness and/or sleep inertia (ie great difficulty in waking up after sleep) and where other causes have been excluded.
Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview. Reference: Access aggregated data from Orphanet at Orphadata. Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version September 2024
Newly diagnosed with
Idiopathic hypersomnia?
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Advocacy Organizations
COMBINEDBrain Inc
COMBINEDBrain is a consortium for outcome measures and biomarkers for neurodevelopmental disorders. We are collaborating to cure rare, non-verbal brain disorders.
FamilieSCN2A Foundation
"Families" is part of our name for a reason. Rare and devastating, SCN2A-related disorders affect the entire family. Our VISION is a world with effective treatments and cures for all SCN2A-related disorders. Our MISSION is to accelerate research, build community and advocate to improve the lives of those affected by SCN2A-related disorders around the world.
Hypersomnia Foundation
The Hypersomnia Foundation engages, informs and champions our global community to improve the lives of people with idiopathic hypersomnia and related sleep disorders.
Moonshots for Unicorns
Curing single-gene disorders
Project CASK
VISION Project CASK believes in a world free of the life limitations and debilitating effects of CASK gene disorders. MISSION To accelerate breakthroughs in research to develop treatments and a cure for CASK gene disorders. VALUES Collaboration. Transparency. Urgency.
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Clinical Trials
For a list of clinical trials in this disease area, please click here.