THE SKULL AND THE BONES OF THE SKULL 



61 



Body of the sphenoid bone (presphenoid 

 portion)- -Corpus ossis sphenoidaiis (pars anterior) 

 Internal pterygoid plate Lamina medialis processus pterygoidei 



Vaginal process Processus vaginalis 

 Foramen rotundum Foramen rotunduni 



Cerebral surface of the great wing 

 Facies cerebralis alas magna: 



Spinous process Spina angularis 



Intersphenoidal synchondrosis 

 Synchondrosis intersphenoidalis 



FIG. 123. THE SPHENOID BONE OF A BOY 



Body-length, 



Optic foramen Foramen opticum 

 Small wing (orbitosphenoid) Ala parva. \ 



Great wing (alisphenoid) 



Ala magna 



Small wing (orbitosphenoid) 



(\la. parva Olivary eminence Tuberculum sellae 



Pituitary fossa 



Fossa hypophyseos 



Great wing (alisphenoid) 



Ala magna 



Foramen ovale 



Foramen ovale 



\Dorsum sellae Dorsum sellae 

 ' Body of the sphenoid bone (postsphenoid 



portion, or basisphenoid) 

 Corpus ossis sphenoidaiis (pars posterior) 



BORN AT FULL TERM, SEEN FROM ABOVE. 



19 inches. 



Body of the sphenoid bone (presphenoid portion) 



"Corpus ossis sphenoidaiis (pars anterior) 

 Vidian or pterygoid canal 

 Canalis pterygoideus (Vidii) 

 Foramen rotundum 

 Foramen rotundum 

 Orbital surface of the great wing 

 Facies orbitalis alae magnae 



Temporal surface of the great wing 



Facies temporalis alas magna; 'see note on p. 59) 



Fterygoid process 



Processus pterygoideus t^ 



Body of the sphenoid bone (postsphenoid portion, or/ 

 basisphenoid) Corpus ossis sphenoidaiis (pars posterior) 



FIG. 124. THE SPHENOID BONE OF A BOY 



Body-length 



Superior wall of the sphenoiclal sinus 

 A 



Temporal surface of the great wine 

 Facies temporalis alae magnae 



(see note on p. 59) 



External pterygoid plate 

 Lamina lateralis processus pterygoidei 

 ' Internal pterygoid plate 

 Lamina medialis processus pterygoidei 



BORN AT FULL TERM, SEEN FROM BELOW. 



, 19 inches. 



Sphenoidal sinus Sinus sphenoidaiis 

 C 



Inferior wall of the sphenoidal sinus 



V, 



Sphenoidal foramen 

 External wall of the sphenoidal sinus T Apertura sinus sphenoidaiis 



IN THE SECOND YEAR OF LIFE. IN THE SIXTH YEAR OF LIFE. IN THE EIGHTH YEAR OF LIFE. 



FIG. 125. CONCHA SPHENOIDALES THE SPHENOIDAL TURBINATE BONES. SEEN FROM ABOVE. 



Body of the sphenoid bone 



Corpus ossis sphenoidaiis 



Sphenoidal tnrbinate bone 

 (inferior surface) 



Concha sphenoidaiis 



Pterygoid process 



Processus pterygoideus 



Great wing 



\;\ Ala magna 



Small wing 



Ala parva 



Primitive sphenoidal rostrum 



Rostrum sphenoidale primitivum 



Sphenoidal foramen 

 Apertura sinus sphenoidaiis 

 Sphenoidal rostrum Rostrum sphenoidale 



FIG. 126. THE RELATION OF THE SPHENOIDAL TUKBINATE BONES TO THE INFERIOR SURFACE 

 OF THE SPHENOID BONE IN THE SIXTH YEAR OF LIFE. 



Development of the Sphenoid Bone. 



