Skull, illustration. The neurocranium extends from the upper orbital margins to the uppermost part of the occipital bone posteriorly. It is composed of the frontal bone, two parietal bones, parts of the temporal bones and occipital bone. The facial skeleton consists of the mandible and maxilla (lower and upper jaw bones), zygoma (cheek bone), and bones of the nose. From Lizars, J. 1823 A system of anatomical plates of the human body. W.H. Lizars, Edinburgh.