title: Pathogenesis of the cluster headache syndrome.
mesh_terms: D001775:Blood Circulation; D002560:Cerebrovascular Circulation; D003027:Cluster Headache / Q000209:etiology* / Q000503:physiopathology; D006257:Head / Q000098:blood supply; D006801:Humans; D008881:Migraine Disorders / Q000209:etiology; D013564:Sympathetic Nervous System / Q000503:physiopathology; D014653:Vascular Headaches / Q000209:etiology*; D014661:Vasoconstriction; D014664:Vasodilation