This process is at first directed lateralward its two surfaces looking upward and downward. In the stl screenshots you can see the mastoid malleus incus the bony canal of the facial nerve the stylomastoid foramen Etc. Petrous Portion Of Temporal Bone Solid Bone That Forms Most Of Posterior Inferior Part Of Temporal Bone The occipital bone overlies the occipital lobes of the cerebrumAt the base of skull in the occipital bone there is a large oval opening called the foramen magnum which allows. . This is a stl file of a left temporal bone ready for 3d printing. The occipital bone ˌ ɒ k ˈ s ɪ p ɪ t əl is a cranial dermal bone and the main bone of the occiput back and lower part of the skullIt is trapezoidal in shape and curved on itself like a shallow dish. It has superficial and deep lobes separated by the facial nerve. I have segmented a CT scan paying attention to all the important bony structures of the ear. Petrous part