Aneurysms in the posterior circulation ( basilar artery, vertebral arteries and posterior communicating artery ) have a higher risk of rupture.
12.
Those of the basilar artery and posterior cerebral artery are hard to reach surgically and are more accessible for endovascular management.
13.
The SCA branches off the lateral portion of the basilar artery, just inferior to its bifurcation into the posterior cerebral artery.
14.
Basilar artery aneurysms represent only 3 %-5 % of all intracranial aneurysms but are the most common aneurysms in the posterior circulation.
15.
The fetal carotid origin of the PCA usually regresses as the vertebral and basilar arteries develop with the PCommA reducing is size.
16.
Direct cranial nerve compression can lead to isolated cranial nerve dysfunction, usually associated with a normal-sized basilar artery that is tortuous and elongated.
17.
Patients often survive on the collateral circulation from the back ( posterior ) of the circle of Willis, arising from the basilar artery.
18.
It arises from the basilar artery on each side at the level of the junction between the medulla oblongata and the pons in the brainstem.
19.
Multiple cranial nerve dysfunction is far more likely to occur if there is dilation ( ectasia ) associated with a tortuous and elongated basilar artery.
20.
A 2011 meta-analysis published in Basilar artery dissection has also been reported in connection with sexual activity, though most coital cephalalgia is benign in nature.
