How Long Is Paradoxical Sleep?

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Definition

Sleep disorders involve any difficulties related to sleeping, including difficulty falling or staying asleep, falling asleep at inappropriate times, excessive total sleep time, or abnormal behaviors associated with sleep.


Causes, incidence, and risk factors

More than 100 different disorders of sleeping and waking have been identified. They can be grouped in four main categories:

  • Problems with falling and staying asleep (insomnia)
  • Problems with staying awake (excessive daytime sleepiness)
  • Pr...
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