Pediatricians estimate that around 20–30% of children have difficulties with sleep that are serious enough to disturb their families.
Although sleepwalking and night terror disorder occur more frequently in children than in adults, children can also suffer from narcolepsy and sleep apnea syndrome.
The sleep apnea syndromes are an ambiguous but critically important class of sleep disorder.
Victims of this life-threatening tendency to stop breathing when they fall asleep and then to choke when they make compensatory efforts to wake up and breathe again may be insomniac (because
their bodies will literally not allow them to go to sleep), they may have excessive sleepiness by day (because they are chronically sleep deprived) and their labored efforts to breathe while asleep can be seen as a form of chronic abnormal sleep movement, which, in the long term may prove to be much more physiologically harmful than other sorts of abnormal sleep movements such as sleepwalking.
See also treatment for sleep disorder