Sleep is a natural state of bodily rest observed throughout the animal kingdom. It is common to all mammals and birds, and is also seen in many reptiles, amphibians and fish.

A sleep disorder (somnipathy) is a medical disorder of the sleep patterns of a person or animal. Some sleep disorders are serious enough to interfere with normal physical, mental ...

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Fact sheet on normal sleep and sleep disorders developed by the National Institute of Neurological Disorders and Stroke (NINDS).

sleepfoundation.org is dedicated to improving the quality of life for Americans who suffer from sleep problems and disorders such as insomnia, sleep apnea and restless legs ...

On-line web source for articles published in SLEEP, the official journal of the American Academy of Sleep Medicine (www.aasmnet.org) and the Sleep Research Society (www ...

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Our mission is to enhance the quality of life for each of our customers, through products and services that significantly improve the quality of their sleep!

Sleep disorders like insomnia, sleep apnea, restless leg syndrome, narcolepsy, snoring, night sweats and others can be managed. Find out more from About.com.