Synonyms: Megrim, Hemicrania, Sick Headache. Recurrent, paroxysmal, severe, incapacitating, unilateral, throbbing headache, with vomiting and preceded by visualor sensory disturbances. A peculiar form of headache, usually unilateral, and frequently associated with gastric and sensory disturbances. PATHOLOGY – Preliminary visual disturbances and cortical (sensory-motor) symptoms at onset of attack are due to: . Vasoconstriction of branches […]