In children this can be central, or caused by enlarged tonsils, allergies, among other causes. More importantly, children
get less quality sleep and can develop ADD behviours to cope. In children
with sleep problems that affect behaviour, %80 of the time it's Apnea/Breathing; I also believe I read that children with Down's have a higher incidence of obstruction. I think it would be worth looking at, if possible (many cities have pediatric sleep apnea programs, and it's non-invasive testing).