Source:http://linkedlifedata.com/resource/umls/id/C0700201
MSH: 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),CHV: a group of disorders characterized by difficulty in going to sleep or staying asleep or excessive daytime sleepiness,CHV: a group of disorders characterized by difficulty in going to sleep or staying asleep or excessive daytime sleepiness,CHV: a group of disorders characterized by difficulty in going to sleep or staying asleep or excessive daytime sleepiness,CHV: a group of disorders characterized by difficulty in going to sleep or staying asleep or excessive daytime sleepiness