Sleep pp 333-336 | Cite as


  • M. Billiard


Falling asleep reading a paper or a book, or in conversation with friends, hearing only part of a lecture, falling asleep at the wheel, sleeping 12 hours a night and being unable to wake up in the morning, are all abnormal situations testifying to hypersomnia. But where do the limits lie? Hypersomnia begins at the point when the subject feels that his everyday life is affected, or else does not realise what is happening but suffers from the consequences in the form of car or machine accidents or reduced performance of any kind.


Sleep Disorder Obstructive Sleep Apnea Syndrome Encephalitis Lethargica Delay Sleep Phase Syndrome Shift Work Sleep Disorder 
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© Springer Science+Business Media New York 2003

Authors and Affiliations

  • M. Billiard
    • 1
  1. 1.Service de Neurologie BHôpital Gui de ChauliacMontpellierFrance

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