Sharon M. O'Brien, MPAS, PA-C

Some well-known sleep disorders, including sleep apnea and parasomnias, are associated with headaches.

Results of a twin study showed that insomnia was moderately heritable, but in childhood, it was thought to be a result of behavior.

Nocturnal seizures can easily be confused with parasomnias, including confusional arousals, cataplexy and REM sleep-behavior disorder.