[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) ( MSH )]
UMLS (CSP) C0700201 Relation/PAR: Disturbances, sleep
Relation/CHD: sleep deprivation
Sleep Disorders, Intrinsic
Circadian rhythm sleep disorder