Dysomnia

Dyssomnias are a broad classification of sleeping disorder that make it difficult to get to sleep, or to stay sleeping.

Major types of dyssomnias
There are over 30 recognized kinds of dyssomnias. Major groups of dyssomnias include:
 * Intrinsic sleep disorders - 12 disorders recognized, including
 * hypersomnia,
 * narcolepsy,
 * periodic limb movement disorder,
 * restless legs syndrome,
 * sleep apnea.
 * Extrinsic sleep disorders - 13 disorders recognized, including
 * alcohol-dependent sleep disorder,
 * food allergy insomnia,
 * inadequate sleep routine.
 * Circadian rhythm disorders - 6 disorders recognized, including
 * advanced sleep phase syndrome,
 * delayed sleep phase syndrome,
 * jetlag,
 * shift work sleep disorder.

External link

 * http://www.mysleepcenter.com/Dyssomnias.html - Complete listing of the group of dysomnias and orders within each group.