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Sleep Disorders
About Insomnia 
This page provides information about the definition and types of insomnia.... Details >
Diseases and Conditions Index
Download these files to listen to information on heart, lung, and blood diseases and sleep disorders.... Details >
National Heart, Lung, and Blood Institute, National Institutes of Health
Facts About Insomnia
This four-page brochure discusses insomnia -- inadequate or poor quality sleep because of difficulty falling asleep, and how it is treated.... Details >
National Center on Sleep Disorders Research, National Heart, Lung, and Blood Institute
Facts About Narcolepsy
Narcolepsy is a chronic sleep disorder with no known cause. The main characteristic of narcolepsy is excessive and overwhelming daytime sleepiness, even after adequate nighttime sleep.... Details >
National Center on Sleep Disorders Research, National Heart, Lung, and Blood Institute
Facts About Problem Sleepiness
Everyone feels sleepy at times. However, when sleepiness interferes with daily routines and activities, or reduces the ability to function, it is called problem sleepiness.... Details >
National Heart, Lung, and Blood Institute Information Center
Find a Sleep Center
If you are having trouble sleeping or are feeling sleepy much of the time, you may have a sleep disorder. This page lists by state, sleep centers or labs accredited by the American Academy of Sleep Me... Details >
Find a Sleep Center
If you are having trouble sleeping or are feeling sleepy much of the time, you may have a sleep disorder. This page lists by state, sleep centers or labs accredited by the American Academy of Sleep Me... Details >
Hypersomnia
Hypersomnia is characterized by recurrent episodes of excessive daytime sleepiness or prolonged nighttime sleep. Different from feeling tired due to lack of or interrupted sleep at night, persons with... Details >
National Institute of Neurological Disorders and Stroke, National Institutes of Health
Insomnia
Insomnia, which is Latin for "no sleep," is the inability to fall asleep or remain asleep. Insomnia can be a disorder in its own right, but often it is a symptom of some other disease or condition. Th... Details >