Lateral view of the surface of the right cerebral hemisphere. The frontal and parietal lobes are separated by the Rolandic sulcus (central sulcus), which divides the precentral gyrus of the frontal lobe from the postcentral gyrus of the parietal lobe. The frontal lobe has several prominent gyri; the superior, middle and inferior frontal gyri lie anterior to the precentral gyrus. The supramarginal gyrus along with the more posterior angular gyrus form the inferior parietal lobule. The Sylvian fissure divides the frontoparietal lobes from the temporal lobe, and from the Sylvian fissure emerge branches of the middle cerebral arteries. The parietooccipital sulcus separates the occipital and parietal lobes, and the pre-occipital notch separates the occipital and temporal lobes. (Image courtesy of AL Rhoton, Jr.)