Medial view of right hemisphere. The corpus callosum is seen cut in midsagittal view; coursing on its surface are branches of the anterior cerebral artery supplying most of the medial surface of the cerebrum. The right caudate nucleus is visible within the ventrolateral wall of the lateral ventricle. The choroid plexus of the lateral and third ventricles is outlined. The midline pineal gland projects posteriorly into the quadrigeminal cistern and is located just rostral to the superior colliculus.  The thalamus and hypothalamus of the diencephalon are well delineated and form the lateral walls of the midline III ventricle.  The falx cerebri is a dural fold that separates the two hemispheres. Further caudally, the falx attaches in the midline to the superior surface of the tentorium cerebelli (not visible in this image). (Image courtesy of PA Rubino)