is a type of migraine headache with aura accompanied by neurological symptoms which begin either in the base of the brain (the brainstem) or from both sides of the brain (both cerebral hemispheres) at the same time. The most common symptoms are dizziness and vertigo, but symptoms may also include headache accompanied by ataxia, tinnitus, decreased hearing, nausea and vomiting, dysarthria, diplopia (blurred or double vision), loss of balance, bilateral paresthesias or paresis, altered consciousness, syncope, and, sometimes loss of consciousness. Migraines, in general, are complex genetic disorders involving environmental factors. The nerves are believed to play a role in the cause of basilar migraines. A familial form has been linked to mutations in the ATP1A2 gene. While basilar migraines are more common in adolescent girls and young women, they occur in all age groups. Treatment may involve the combination of nonsteroidal anti-inflammatory medications with and an antiemetic phenothiazine. More recently, triptans, once contraindicated due to their propensity to constrict blood vessels, have been found to relieve these headaches without adverse effects. Source: Genetic and Rare Diseases Information Center (GARD), supported by ORDR-NCATS and NHGRI.