Basilar artery

• Presentation, Treatment and Outcomes of Acute Basilar Artery Occlusion: A Retrospective Analysis
• Symptomatic Cerebral Vasospasm Following the Resection of Petroclival Meningioma
• Small basilar artery fenestration mimicking an aneurysm
• Microsurgery for basilar apex aneurysms: a case series
• Multiple Paraclinoid Aneurysms and Basilar Tip Clipped by the Same Orbito-Zygomatic Approach: 2-Dimensional Operative Video
• Rescue Stenting for Failed Mechanical Thrombectomy in Acute Basilar Artery Occlusions: Analysis of the PC-SEARCH Registry
• Anatomical analysis of vertebral arteries in vertebrobasilar dolichoectasia: A multi-center study
• Minimally invasive presigmoid retrolabyrinthine suprameatal approach (PRSA): A cadaveric study for accessing premeatal anterior inferior cerebellar artery (AICA) aneurysms

Vertebral artery segment V4 (intradural): from the dura to their confluence to form the basilar artery.

Formed by the junction of the 2 vertebral artery.

The two vertebral arteries and the basilar artery are sometimes together called the vertebrobasilar system, which supplies blood to the posterior part of the circle of Willis and anastomoses with blood supply to the anterior part of the circle of Willis from the internal carotid arteries.

It ascends in the central gutter (sulcus basilaris) inferior to the pons and divides into the posterior cerebral arteries and the superior cerebellar artery just inferior to the pituitary stalk.

The basilar arterial bifurcation is the most common site for aneurysms arising from the posterior circulation.

V4 vertebral artery segment pierces the dura (location somewhat variable) and immediately enters the subarachnoid space. Joins the contralateral VA at the vertebral confluence located at the lower pontine border to form the basilar artery (BA).

Basilar artery branches.

Basilar artery segments.

The basilar artery territory refers to the area of the brain supplied by the basilar artery and its branches. This territory is critical for many essential functions as it provides blood flow to the brainstem, cerebellum, occipital lobes, and parts of the thalamus.

1. Brainstem:

1. Midbrain, pons, and medulla oblongata.
2. Contains critical nuclei and pathways for autonomic and motor functions.

2. Cerebellum:

1. Coordination of voluntary movements and balance.

3. Thalamus:

1. Relays sensory and motor signals.

4. Occipital lobes:

1. Responsible for visual processing.

5. Inner ear structures (via AICA):

1. Critical for hearing and balance.

see Basilar artery occlusion.

Understanding the basilar artery territory is vital for diagnosing and treating posterior circulation disorders effectively.

see Basilar artery aneurysm.

see Dolichoectatic basilar artery.