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Ref : 013478-72 - © Pascal MARSEAUD - ISM Migraine. Computer artwork of a cutaway of a human head, showing the brain and the mode of action of a migraine. Migraines occur when abnormal activity nerve cell activity creates electrical impulses that cause inflammation of the meningeal arteries. These electrical impulses spread, stimulating sensory fibres of the trigeminal nerve, to the nucleus of the trigeminal nerve (pain centre, green) located in the brainstem. |