Current Neurology and Neuroscience Reports

, Volume 6, Issue 2, pp 156–162 | Cite as

Differential diagnosis in hypersomnia

  • Yves Dauvilliers


Hypersomnia includes a group of disorders in which the primary complaint is excessive daytime sleepiness. Chronic hypersomnia is characterized by at least 3 months of excessive sleepiness prior to diagnosis and may affect 4% to 6% of the population. The severity of daytime sleepiness needs to be quantified by subjective scales (at least the Epworth sleepiness scale) and objective tests such as the multiple sleep latency test. Chronic hypersomnia does not correspond to an individual clinical entity but includes numerous different etiologies of hypersomnia as recently reported in the revised International Classification of Sleep Disorders. This review details most of those disorders, including narcolepsy with and without cataplexy, idiopathic hypersomnia with and without long sleep time, recurrent hypersomnia, behaviorally induced insufficient sleep syndrome, hypersomnia due to medical condition, hypersomnia due to drug or substance, hypersomnia not due to a substance or known physiologic condition, and also sleep-related disordered breathing and periodic leg movement disorders.


Obstructive Sleep Apnea Epworth Sleepiness Scale Excessive Daytime Sleepiness Narcolepsy Sodium Oxybate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Current Science Inc 2006

Authors and Affiliations

  1. 1.Neurology DepartmentGui de Chauliac HospitalMontpellierFrance

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