Archive image from page 741 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana01todd Year: 1836 726 CRANIUM. laterally, rough surfaces and processes for the attachment of muscles concerned in deglutition, also some of the foramina already referred to, for the transmission of the vessels and nerves of the throat to and from the interior of the skull, as well as the surfaces on which the lower jaw moves. The upper surface of the base conforming to the base of the brain, there are larger depres- sions on it for the anterior and middle lobes; a deep pit or c
Archive image from page 741 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana01todd Year: 1836 726 CRANIUM. laterally, rough surfaces and processes for the attachment of muscles concerned in deglutition, also some of the foramina already referred to, for the transmission of the vessels and nerves of the throat to and from the interior of the skull, as well as the surfaces on which the lower jaw moves. The upper surface of the base conforming to the base of the brain, there are larger depres- sions on it for the anterior and middle lobes; a deep pit or cavity for the cerebellum, and in the centre a broad sulcus, which glides into that pit, for the medulla oblongata, as well as strong ridges and processes to afford attachment to the membranous partitions which severally exist between the cerebrum and cerebellum, the he- mispheres of the former and the lobes of the latter organ. Thebonesinto which the cranium is separable or of which it is immediately formed, are eight, viz. the sphenoid, the frontal, the ethmoid, the occipital, the two temporal, and the two parietal. The first named bone is so placed as to be in connexion with all the others, and to have them grouped around it; so that the frontal (F, fig. 370) and ethmoid are in its front, the Fig. 370. WM wi r'>;>' occipital (O, Jig. 372) is behind it, the two temporal (T, jig. 370) are on its sides, and the two parietal (P, fig. 370) are above it. The sphenoid bone (from atpnv, cuneus, os sphenoidale; Germ. Sphenoidal-knochen, Keil- knochen) comprehends the quadrilateral mass which forms the centre of the frame-work, the anterior ribs which support the frontal and partly the lateral domes, and the depending pillars which form the boundaries of the face; it extends to each temple, is behind and in part forms the orbits and the nose, and is also behind but in close connexion with the bones of the face. The central portion is called the body, and the diverging proces
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