#sleep_disorder__sleepdisorder  a disturbance of the normal sleep pattern
  supertype:  disorder.state__upset  condition in which there is a disturbance of normal functioning; "the doctor prescribed some medicine for the disorder"; "everyone gets stomach upsets from time to time"
  subtype:  hypersomnia  an inability to stay awake
     subtype:  catalepsy  a trancelike state with loss of voluntary motion and failure to react to stimuli
     subtype:  narcolepsy  a sleep disorder characterized by sudden and uncontrollable episodes of deep sleep; "he believes that narcolepsy is attributable to an inability to suppress REM sleep during waking"
  subtype:  insomnia  an inability to sleep; chronic sleeplessness
  subtype:  sleep_terror_disorder__pavor_nocturnus__pavornocturnu  a disorder of sleep characterized by a dream of terrifying dimensions far worse than a typical nightmare; they occur during NREM sleep
  subtype:  sleep_apnea__sleepapnea  apnea that occurs during sleep
     subtype:  sudden_infant_death_syndrome__SIDS__infant_death__crib_death__cot_death__cotdeath  sudden and unexpected death of an apparently healthy infant during sleep

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