CERVICAL VERTIGO – Cervical spine Anatomy & Vertebro basilar syStem

The vertebral arteries are branches of the subclavian arteries. Together with the basilar artery constitute the vertebrobasilar system which supplies blood to the posterior part of Circle of Willis and anastomose with blood supplied to the anterior part of the circle of Willis from the carotid arteries.

Cranial portion of the Vertebral arteries

Inside the skull, the two vertebral arteries join up to form the basilar artery at the base of the medulla oblongata. The basilar artery is the main blood supply to the brain stem and connects to the Circle of Willis to potentially supply the rest of the brain if there is compromise to one of the carotids.

Cervical portion of the Vertebral arteries – Can be divided into 4 parts for the purpose of description