ABSTRACT
Migraine is a common primary episodic headache disorder. In the United States, more than 17% of women and 6% of men had at least one migraine attack in the past year. Although the term migraine derives from the Greek word ‘hemicrania’, which means ‘half of the head’, it is not always a strictly unilateral headache; it can be bilateral and it is characterized by various combinations of neurologic, gastrointestinal and autonomic symptoms.
