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 ...

Note the abrupt cutoff at the top of the basilar artery. There is a nearly complete absence of any branches off the posterior cerebral arteries. This is the angiographic picture of an embolus, in this ...

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.

The vertebrobasilar arterial system is located at the back of your brain and includes the vertebral and basilar arteries. These arteries supply blood, oxygen, and nutrients to vital brain ...

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 ...

This can be either unilateral or bilateral.. In the intracranial MRA above, note that both PCAs are arising directly from the internal carotid arteries (ICA) and not the basilar. In patients with this ...