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)
- Problems with sticking to a regular sleep schedule (sleep rhythm problem)
- Unusual behavoirs during sleep (sleep-disruptive behaviors)
PROBLEMS WITH FALLING AND STAYING ASLEEP