Which structure is formed by the internal carotid arteries?

The anterior cerebral arteries are indeed formed by the internal carotid arteries. Each internal carotid artery bifurcates into two major branches: the anterior cerebral artery and the middle cerebral artery. This bifurcation occurs at the level of the circle of Willis, a crucial arterial structure that provides collateral circulation to the brain.

The anterior cerebral arteries run along the longitudinal fissure of the brain and are responsible for supplying blood to the medial portions of the frontal lobes and the superior medial parietal lobes. Their importance in cerebral circulation highlights the role of the internal carotid arteries as primary suppliers of blood to significant regions of the brain.

Understanding the anatomy and branching patterns of the carotid arteries is vital in interventional radiology, as it aids in diagnosing and managing various cerebrovascular conditions.