title: Headache mechanisms. II.
mesh_terms: D000818:Animals; D001808:Blood Vessels / Q000503:physiopathology; D006261:Headache / Q000503:physiopathology*; D007427:Intracranial Pressure; D008784:Methysergide / Q000627:therapeutic use; D008881:Migraine Disorders / Q000503:physiopathology; D009419:Nerve Tissue Proteins; D010146:Pain; D051381:Rats; D014653:Vascular Headaches / Q000188:drug therapy / Q000503:physiopathology; D014665:Vasodilator Agents
chemical_list: D009419:Nerve Tissue Proteins; D014665:Vasodilator Agents; D008784:Methysergide