Canadian Medical Guide > Diseases > Nervous System Diseases > Sleep Disorders > Dyssomnias Terms and Definitions

Dyssomnias

Medical Definition:	A broad category of sleep disorders characterized by either hypersomnolence or insomnia. The three major subcategories include intrinsic (i.e., arising from within the body) (SLEEP DISORDERS, INTRINSIC), extrinsic (secondary to environmental conditions or various pathologic conditions), and disturbances of circadian rhythm. (From Thorpy, Sleep Disorders Medicine, 1994, p187)
Also Called:	Adjustment Sleep Disorder,Environmental Sleep Disorder,Inadequate Sleep Hygiene,Limit-Setting Sleep Disorder,Nocturnal Eating-Drinking Syndrome,Sleep Disorders, Extrinsic
Previously Indexed:	Circadian Rhythm (1966-1999)

Dyssomnias Categories.

	Sleep Deprivation - The state of being deprived of sleep under experimental conditions, due to life events, or from a wide variety of pathophysiologic causes such as medication effect, chronic illness, psychiatric illness, or sleep disorder.
	Sleep Disorders, Intrinsic - Dyssomnias (i.e., insomnias or hypersomnias) associated with dysfunction of internal sleep mechanisms or secondary to a sleep-related medical disorder (e.g., sleep apnea, post-traumatic sleep disorders, etc.). (From Thorpy, Sleep Disorders Medicine, 1994, p187)

Dyssomnias Medical Definitions and Terms

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