What is a migraine with aura, and what causes it?
“Migraine with aura” is a relatively new name for the less common type of migraine headache. Other names you might hear are classic migraine or migraineur. Aura refers to feelings and symptoms you notice shortly before the headache begins. These early symptoms are also called a prodrome. Scientists aren’t sure what causes migraines with aura. It’s thought that at least two brain chemicals — serotonin and dopamine — play a role. According to the theory, something goes awry in the way these chemicals regulate brain function. This may cause the brain and the body’s immune system to overreact. When this happens, a flood of immune response cells flows through the blood vessels to the brain. The brain’s blood vessels open wider to accommodate these cells. Even more chemicals are released to help control the vessels’ muscles. The vessels open and constrict. A severe, often throbbing headache results. Factors suspected of causing migraines with aura include genetics and being overweight. Sub
