Lateral dissection of the frontal and parietal lobes. The inferior fronto-occipital fasciculus courses obliquely through the deep cerebral white matter to interconnect the frontal lobe with the occipital lobe.  The putamen of the lentiform nucleus has been removed to reveal the globus pallidus and, medial to that, the internal capsule. The lateral ventricles on each side are separated by the midline septum pellucidum.  The blood supply of the medial surface of the frontal and parietal lobes is derived from the callosomarginal and supracallosal branches of the ACA.  Branches of the inferior division of the MCA exit the lateral fissure of Sylvius and distribute, fan-like, over the lateral surface of the temporal and occipital lobes. (Image courtesy of AL Rhoton, Jr.)