Skull and Hyoid 



213 



for the _ejyit uf the facial nerve and entrance of stylo-mastoid artery (from posterior 

 auricular). This foramen is just behind the styloid process. 



The seventh is the nerve of the second arch, of which the styloid is the bar : the 



posf-Qtenoid prot fs 



(ntfaftf/e root 



fffr 



pefro-clinnlct 



Inff, 

 perron I 

 Sinus 



coeh/ea. 



FIG. 175. Outer and inner aspects of temporal bone. Right side. A. in lower 

 figure marks junction of parietal and sphenoidal articular surfaces on margin. 



typical arrangement is that the nerves run into their arches behind the bars and then 

 turn forward round them to reach the front of the arches, and the facial nerve shows 

 this relation, issuing behind the styloid and then turning forward over it. 



The inner or posterior surface of the petrous looks backwards and inwards into the 



