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 ...

verb (used without object) 1. to take the rest afforded by a suspension of voluntary bodily functions and the natural suspension, complete or partial, of consciousness; cease ...

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 ...

Read about how to get a healthy nights sleep, how much sleep is enough, and why skimping on sleep can lead to poor performance, health, and moods.

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 ...

Sleep Train has superior service, the best selection and the lowest prices, guaranteed. With free same day delivery and interest free financing at over 70 convenient locations ...

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.