A sleep disorder, or 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, social and emotional functioning. Polysomnography is a test commonly ordered for some sleep disorders. Disruptions in sleep can be caused by a variety of issues, from...
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http://en.wikipedia.org/wiki/Sleep_disorder
(from the article `nervous system disease`) The raphe nuclei of the pons and the locus ceruleus, which mediate sleep, are situated in the brainstem. Sleep consists of two phases: rapid eye ... It is important at the outset to emphasize that, as dramatic and reliable as the various stages of sleep are, their functions or relations to wak...
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http://www.britannica.com/eb/a-z/s/108
A disturbance of normal sleep patterns. There are a number of sleep disorders that range from trouble falling asleep, to nightmares, sleepwalking, and sleep apnea (problems with breathing that cause loud snoring). Poor sleep may also be caused by diseases such as heart disease, lung disease, or nerve disorders.
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http://www.cancer.gov/dictionary?expand=S
[
n] - a disturbance of the normal sleep pattern
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http://www.webdictionary.co.uk/definition.php?query=sleep%20disorder
noun a disturbance of the normal sleep pattern
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https://www.encyclo.co.uk/local/20974
No exact match found.
