What is the main artery supplying the medial surfaces of the frontal and parietal lobes?

The anterior cerebral artery mainly supplies the medial surfaces of the frontal and parietal lobes.

It is one of the two major terminal branches of the internal carotid artery. The left and right anterior cerebral arteries run forward and then course around the corpus callosum, sending branches over the medial aspect of the cerebral hemisphere.

Its cortical territory includes areas involved in leg sensation and movement, as well as parts of the medial frontal lobe. This distribution helps explain why an anterior cerebral artery stroke can produce weakness or sensory loss that is more pronounced in the opposite leg than in the arm.

The anterior communicating artery links the two anterior cerebral arteries near their origins. Together with other vessels, this connection contributes to the arterial circle at the brain’s base. The middle cerebral artery usually supplies much of the lateral cerebral surface, so medial-versus-lateral territory is an important distinction in neuroanatomy.