Inferior Cerebellar Anatomy. Two of the nine lobules of the cerebellar vermis, the pyramid and uvula, are demonstrated here. The pyramid is contiguous bilaterally with the biventral lobules of the hemisphere. The uvula is contiguous bilaterally with the cerebellar tonsils. Choroid plexus of the tela choroidea is seen suspended from the inferior roof of the fourth ventricle.  The posterior medullary velum has been largely removed to expose the floor of the fourth ventricle and obex.  (Image courtesy of AL Rhoton, Jr.)