APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -The primary contributors to the anterior circulation of the brain are the internal carotid arteries (ICA), while the primary contributors to the posterior circulation are the vertebral arteries (VA).

Detailed explanation-2: -The internal carotid arteries are branches of the common carotid arteries that bifurcate into the internal and external carotids at the level of the carotid sinus. [2] After this bifurcation, the internal carotids traverse through the base of the skull to reach the vital organs that they supply.

Detailed explanation-3: -At the base of the skull the glossopharyngeal, vagus, accessory, and hypoglossal nerves lie between the artery and the internal jugular vein. Unlike the external carotid artery, the internal carotid normally has no branches in the neck.

Detailed explanation-4: -Your internal carotid arteries begin at the carotid bifurcation on either side of your neck. Each artery travels up through your neck until it reaches the base of your skull. Researchers call this part of the internal carotid artery the C1 or cervical segment.