sleep disorder

1. A disturbance of the normal sleep pattern (synset 114321198)
   is a type of: disorder, upset - a physical condition in which there is a disturbance of normal functioning
   subtypes:

   • hypersomnia - an inability to stay awake
   • insomnia - an inability to sleep; chronic sleeplessness
   • pavor nocturnus, sleep terror disorder - a disorder of sleep characterized by a dream of terrifying dimensions far worse than a typical nightmare; they occur during NREM sleep
   • sleep apnea - apnea that occurs during sleep

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