circle of willis

Basilar Artery

Basilar Artery The structure indicated is the basilar artery. The basilar artery is formed from the union of the two vertebral arteries on either side. The vertebral arteries arise from the first part of the subclavian artery. Two other arteries are given off from the first part of the subclavian artery – the internal thoracic artery and the thyrocervical trunk. The vertebral and internal carotid arteries provide the arterial supply to the brain, forming the Circle of Willis at the base of the brain. After the vertebral artery is given off from the subclavian artery, it passes through the transverse …

Basilar Artery Read More »

basilar artery

Posterior Communicating Artery

Posterior Communicating Artery The structure indicated is the posterior communicating artery of the circle of Willis. It is one of the blood vessels which contributes to the arterial Circle of Willis – an anastomosis of arterial vessels located on the base of the brain, consisting of the following arteries: Anterior cerebral artery Anterior communicating artery Internal carotid artery Posterior cerebral artery Posterior communicating artery The posterior communicating artery connects the three cerebral arteries on the same side. It connects to the terminal part of the internal carotid artery before it bifurcates into the anterior cerebral artery and the middle cerebral …

Posterior Communicating Artery Read More »

Posterior Communicating Artery

Anterior Communicating Artery

Anterior Communicating Artery The structure indicated is the anterior communicating artery. The anterior communicating artery connects the left cerebral artery to the right cerebral artery. It is one of the blood vessels which contributes to the arterial Circle of Willis – an anastomosis of arterial vessels located on the base of the brain, consisting of the following arteries: Anterior cerebral artery Anterior communicating artery Internal carotid artery Posterior cerebral artery Posterior communicating artery The anterior cerebral artery also gives rise to small collateral vessels which supply the frontal lobes and basal forebrain. This vessel is a common site for the …

Anterior Communicating Artery Read More »

Anterior Communicating Artery