The primary visual cortex is primarily supplied by which two major arteries?

The primary visual cortex is primarily supplied by which two major arteries?

• A. Posterior cerebral artery and Middle cerebral artery
• B. Anterior cerebral artery and Middle cerebral artery
• C. Middle cerebral artery and Anterior choroidal artery
• D. Internal carotid artery and Vertebral artery

Answer: (A)

The primary visual cortex, located along the calcarine sulcus in the occipital lobe, receives its main blood supply from the posterior cerebral arteries via the calcarine branches. The middle cerebral artery also contributes to the occipital region, providing additional supply to portions of the visual cortex, especially its lateral aspects. Together, these two arteries account for essentially the vascular blood flow to the primary visual cortex. The anterior cerebral artery mainly irrigates the medial frontal and parietal areas, not the calcarine region. The anterior choroidal artery supplies some deep structures and parts of the optic tract and radiations, but not the bulk of the primary visual cortex. Upstream arteries like the internal carotid and vertebral arteries are sources that give rise to PCA and MCA, rather than being the direct supply to V1.

The primary visual cortex, located along the calcarine sulcus in the occipital lobe, receives its main blood supply from the posterior cerebral arteries via the calcarine branches. The middle cerebral artery also contributes to the occipital region, providing additional supply to portions of the visual cortex, especially its lateral aspects. Together, these two arteries account for essentially the vascular blood flow to the primary visual cortex.

The anterior cerebral artery mainly irrigates the medial frontal and parietal areas, not the calcarine region. The anterior choroidal artery supplies some deep structures and parts of the optic tract and radiations, but not the bulk of the primary visual cortex. Upstream arteries like the internal carotid and vertebral arteries are sources that give rise to PCA and MCA, rather than being the direct supply to V1.