It is the fifth leading cause of death in the United States. A basilar artery stroke occurs when blood flow to the brain is interrupted. This can happen if the vessel becomes blocked (an ischemic ...

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

About three in 100 people will have a brain aneurysm, varying in size from less than 5mm to more than 25mm in diameter. The ...

The location of an aneurysm is also important. Aneurysms on blood vessels located in the back half of the brain (vertebral arteries, the basilar artery, and the posterior communicating artery) are at ...

The basilar artery typically bifurcates into two posterior cerebral arteries (PCA) (Figure 1). The PCAs supply the occipital lobes and portions of the temporal lobes. Proximally, these arteries ...