Medically reviewed by Nicholas R. Metrus, MD The posterior communicating artery (PCOM) is a part of a group of arteries in ...

The posterior circulation consists of the vertebral and basilar arteries and their branches. Typically, two vertebral arteries join and form the basilar artery. The vertebrobasilar system supplies ...

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 ...