$OCLG !! There are more than 100 different sleepin

$OCLG !! There are more than 100 different sleeping and waking disorders. They can be grouped into four main categories:

Problems falling and staying asleep (insomnia)
Problems staying awake (excessive daytime sleepiness)
Problems sticking to a regular sleep schedule (sleep rhythm problem)
Unusual behaviors during sleep (sleep-disruptive behaviors)

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