Which artery supplies blood to the back lower portions of the brain, including occipital and temporal lobes?

• A. Anterior Cerebral Artery
• B. Middle Cerebral Artery
• C. Posterior Cerebral Artery
• D. Basilar Artery

Answer: (C)

Blood supply to the posterior part of the cerebrum, including the occipital lobe and the inferior/medial temporal lobes, comes from the posterior cerebral arteries. These vessels branch from the basilar artery and form part of the brain’s posterior circulation, delivering blood to the visual processing areas in the occipital cortex and the adjacent temporal regions. Other major arteries have different territories: the anterior cerebral arteries feed the medial frontal and parietal surfaces, the middle cerebral arteries supply the lateral aspects of the hemispheres, and the basilar artery primarily serves the brainstem and cerebellum while giving rise to the posterior cerebral arteries. So the artery that supplies the back lower portions of the brain, including the occipital and temporal lobes, is the posterior cerebral artery. Lesions here often affect vision, such as homonymous visual field deficits.