The posterior cerebral arteries branch off from the basilar artery. The left and right PCAs form the longest sections of the circle of Willis. The internal carotid arteries are located in the ...

The vascular anatomy, clinical presentation, and severity of neurologic deficit in patients with basilar-artery occlusion differ from those in patients with anterior-circulation strokes.

Prior to pursing an intervention, the anatomy of the anterior and posterior ... vessel that joins the contralateral vertebral artery to form the basilar artery. This segment is infrequently ...