OSTEOLOGY 



21 



Occipital squama (" scale") 



Mastoid margin 



Lambdoid margin 



Interparietal bone 



Clivus ("slope") 



Pharyngeal tubercle 



Occipital condyle 



Condyloid canal (O. T. posterior con- 

 dyloid foramen) 



Hypoglossal canal (O. T. anterior 

 condyloid foramen) 



Jugular tubercle 



Jugular notch 



Jugular process 



Condyloid fossa 



Intra jugular process 



Occipital plain 



Nuchal plain 



External occipital protuberance 



Occipital torus ("swelling") 



External occipital crest 



Supreme nuchal line 



Superior nuchal line 



Inferior nuchal line 



Cruciate eminence 



Internal occipital protuberance 



Sagittal sulcus (O. T. superior longi- 

 tudinal sulcus) 



Transverse sulcus 



Paramastoid process 



Sphenoid bone 



Body 



Turkish saddle 



Hypophyseal fossa (O. T. pituitary 



fossa) 



Back of sella 



Tubercle of sella or pommel 

 Middle clinoid process 

 Posterior clinoid process 

 Carotid sulcus (O. T. cavernous 



groove) 

 Sphenoidal tongue 



Sphenoidal crest (O. T. ethmoidal 



crest) 



Sphenoidal rostrum 

 Sphenoidal sinus 

 Septum of sphenoidal sinuses 

 Opening of sphenoidal sinus 

 Sphenoidal conchae ("shell") (O. T. 



sphenoidal turbinated bones) 

 Clivus (" slope") 



Small wing 



Sulcus of the chiasma (O. T. optic 



groove) 

 Optic foramen 

 Anterior clinoid process 

 Superior orbital fissure 



Large wing 



Cerebral surface 



Temporal surface 



Sphenomaxillary surface 



Orbital surface 



Zygomatic margin 



Frontal margin 



Parietal angle 



Squamosal margin 



Infratemporal crest (O. T. pterygoid 



ridge) 



Round foramen 

 Oval foramen 

 Spinous foramen 

 Angular spine (O. T. spinous process) 



Pterygoid process 



Lateral layer of pterygoid process 



Medial layer of pterygoid process 



Pterygoid fissure 



Scaphoid fossa 



Vaginal process 



Pterygoid hamulus ("hook") (O. T. 



hamular process) 

 Sulcus of pterygoid hamulus 

 Pterygoid fossa 

 Pterygoid canal (O. T. Vidian canal) 



