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)

Descriptor ID	D020920
MeSH Number(s)	C10.886.425 F03.870.400
Concept/Terms	Dyssomnias Dyssomnias Dyssomnia Environmental Sleep Disorder Environmental Sleep Disorder Environmental Sleep Disorders Sleep Disorders, Environmental Sleep Disorder, Environmental Sleep Disorders, Extrinsic Sleep Disorders, Extrinsic Extrinsic Sleep Disorder Extrinsic Sleep Disorders Sleep Disorder, Extrinsic Limit-Setting Sleep Disorder Limit-Setting Sleep Disorder Limit Setting Sleep Disorder Limit-Setting Sleep Disorders Sleep Disorders, Limit-Setting Sleep Disorder, Limit-Setting Sleep Disorder, Limit Setting Nocturnal Eating-Drinking Syndrome Nocturnal Eating-Drinking Syndrome Eating-Drinking Syndrome, Nocturnal Eating-Drinking Syndromes, Nocturnal Nocturnal Eating Drinking Syndrome Nocturnal Eating-Drinking Syndromes Syndrome, Nocturnal Eating-Drinking Syndromes, Nocturnal Eating-Drinking Adjustment Sleep Disorder Adjustment Sleep Disorder Adjustment Sleep Disorders Sleep Disorders, Adjustment Sleep Disorder, Adjustment Inadequate Sleep Hygiene Inadequate Sleep Hygiene Sleep Hygiene, Inadequate

Below are MeSH descriptors whose meaning is more general than "Dyssomnias".

Below are MeSH descriptors whose meaning is related to "Dyssomnias".

Below are MeSH descriptors whose meaning is more specific than "Dyssomnias".