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Abstract
The hypothalamic neuropeptide hypocretin (orexin) modulates sleep-wake, feeding and endocrine functions. Cerebrospinal fluid (CSF) hypocretin-1 (Hcrt-1) concentrations are low in patients with narcolepsy-cataplexy, a sleep disorder characterized by hypersomnolence and rapid eye movement (REM) sleep abnormalities.We determined CSF Hcrt-1 concentrations of patients with the fibromyalgia syndrome (FMS), a condition characterized by fatigue, insomnia and in some cases daytime hypersomnolence.Basal CSF levels of Hcrt-1 in FMS did not differ from those in healthy normal controls.These findings suggest that abnormally low Hcrt-1 is not a likely cause of fatigue in FMS.
View details for DOI 10.1016/j.sleep.2006.08.015
View details for Web of Science ID 000246343100010
View details for PubMedID 17369087