Migraine with brainstem aura or MBA (formerly known as basilar migraines) are headaches that start in the lower part of the brain, called the brainstem. They cause symptoms such as dizziness ...

Typically, two vertebral arteries join and form the basilar artery. The vertebrobasilar system supplies the brainstem and has branches to the cerebellum. The basilar artery typically bifurcates ...

The posterior cerebral arteries branch off from the basilar artery. The left and right PCAs form the longest sections of the ...