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Sleep - Wikipedia, the free encyclopedia
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.
Guide to Healthy Sleep on MedicineNet.com
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.
Sleep disorder - Wikipedia, the free encyclopedia
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 ...
SLEEP
On-line web source for abstracts of articles published in SLEEP, the official journal of the American Sleep Disorders Association (www.asda.org) and the Sleep Research Society ...
Brain Basics: Understanding Sleep: National Institute of Neurological ...
Fact sheet on normal sleep and sleep disorders developed by the National Institute of Neurological Disorders and Stroke (NINDS).
sleep: Definition, Synonyms from Answers.com
sleep n. A natural periodic state of rest for the mind and body, in which the eyes usually close and consciousness is completely or partially lost,