THE SKULL AND THE BONES OF THE SKULL 



Squamous portion of the temporal bone 



Squama tcmporalis 



Cerebral surface 



Parietal notch 



Incisura parietalis 



Mastoid portion 



Pars mastoidea 



Sigmoid sulcus 

 Sulcus sigmoideus 



Mastoid foramen 

 Foramen mastoideum 



Occipital border 



Margo occipitaliS' 

 External orifice of the aqueduct of the vestibule / 



Apertura externa aquaeductus vestibuli 



, Jugular notch / 



Incisura jugularis 



Intrajugular process 

 Processus intrajugularis 



Zygoma 



Processus zygomaticus 

 Eminence of superior semicircular canal 

 - Eminentia arcuata 

 Superior petrosal sulcus 

 Sulcus petrosus superior 

 Flcccular fossa, or hiatus subarcuatus 



Frssa Mibarcuata 



Internal auditory aperture 



Porus acusticu.s interims 



Apex of the petrous portion 

 Apex pyramidis 



V, 



Inferior petrosal sulcus 



Sulcus petrosus inferior 



\ External orifice of the aqueduct of the cochlea 



\ Apertura externa canaliculi cochleae 



Petrous portion 



Pars petrosa (Pyramis) 



FIG. 129. THE LEFT TEMPORAL BONE SEEN FROM WITHIN (CEREBRAL SURFACE). 



Parietal notch 

 Incisura parietalis 



Petrosquamous fissure 

 Fissura petrosquamosa 

 Eminence of the superior semicircular canal 

 Eminentia arcuata 



Superior petrosal sulcus 

 Sulcus petrosus superior 



Hiatus Fallopii Hiatus canalis facialis 

 Groove of the great superficial petrosal nerve 



Sulcus nervi petrosi suuurlicialis majoris 



Groove of the small superficial petrosal nerve 



Sulcus nervi petrosi superficial minoris 



Fossa of the Gasserian ganglion 



Impressio trigemini 



Apex of the petrous portion- 

 Apex pyramidis 



Carotid canal ' 

 Canalis caroticus 



Eustachian canal and canal for the tensor tyrnpani muscle 



Canalis musculotubarius 



Temporal surface of the squamous portion of the 



temporal bone 

 Facies temporalis squamae temporalis 



. Zygoma 

 Processus zygomaticus 



FIG. 130. THE LEFT TEMPORAL BONE SEEN FROM ABOVE (INTERNAL BASAL SURFACE). 



Os temporale The temporal bone. 



