A system of human anatomy, general and special . 20. The internal border of the spinous process,which assists in the formation of the foramen lacerum basis cranii. 21. That portion ofthe greater ala which articulates with the anterior inferior angle of the parietal The portion of the greater ala which articulates with the orbital process of the frontalbone. * The antero-inferior view of the sphenoid bone. 1. The ethmoid spine. 2. The ros-trum. 3. The sphenoidal spongy bone, partly closing the left opening of the sphenoidalcells. 4. The lesser wing. 5. The foramen opticum piercing the
A system of human anatomy, general and special . 20. The internal border of the spinous process,which assists in the formation of the foramen lacerum basis cranii. 21. That portion ofthe greater ala which articulates with the anterior inferior angle of the parietal The portion of the greater ala which articulates with the orbital process of the frontalbone. * The antero-inferior view of the sphenoid bone. 1. The ethmoid spine. 2. The ros-trum. 3. The sphenoidal spongy bone, partly closing the left opening of the sphenoidalcells. 4. The lesser wing. 5. The foramen opticum piercing the base of the lesser The sphenoidal fissure. 7. The foramen rotundurn. 8. The orbital surface of thegreater wing. 9. Its temporal surface. 10. The pterygoid ridge. 11. The pterygo-palatine canal. 12. The foramen of entrance to the Vidian canal. 13. The internalpterygoid plate. 14. The hamular process. 15. The external pterygoid plate. 16. Theforamen spinosum. 17. The foramen ovale. 18. The extremity of the spinous processof the V SPHENOID BONE. 75 side and intended for articulation with the borders of the vomer. Oneach of these plates, close to the root of the pterygoid process, is agroove (sometimes a complete canal) converted into a canal by thepalate bone, the pterygopalatine canal for the pterygopalatine ar-tery ; and traversing the roots of the pterygoid processes at theirunion with the body of the bone are the two pterygoid or Vidiancanals which give passage to the Vidian nerve and artery at eachside. The posterior surface is flat and rough, and articulates with thebasilar process of the occipital bone. In the adult this union is usu-ally completed by bone; from which circumstance the sphenoid, inconjunction with the occipital, is described by Soemmering andMeckel, as a single bone, under the name of spheno-occipital. Theposterior surface is continuous on each side with the spinous process,and at the angle of union is the termination of the Vidian canal.
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectanatomy, bookyear1847
