2 68 



HEAD AND NECK 



The former appears posterior to the temporo-mandibular joint, 

 and the buccinator nerve either pierces it or emerges from 

 between its two heads of origin. The spheno-mandibular 

 ligament also will be seen. It is the thin strip of membrane 

 which lies medial to the inferior alveolar nerve. 



Musculus Pterygoideus Externus. The external pterygoid 



, .Temporal muscle 



Deep temporal artery 



Deep temporal nerve 

 Deep temporal artery 



Deep temporal nerve 

 Masseteric nerve 



Superficial temporal artery 

 Auriculo-temporal nerve 



External pterygoid 

 Middle meningeal artery 



Mastoid process 

 External carotid 



Accessory meningeal artery 

 Inferior alveolar artery 



N Mylo-hyoid artery and nerve 

 Inferior alveolar nerve 

 Lingual nerve 

 Buccinator Internal pterygoid muscle 



FIG. no. Dissection of the Infratemporal Region. 



arises in the infratemporal fossa by two heads, an upper and 

 a lower. The upper head springs from the infratemporal 

 ridge and surface of the great wing of the sphenoid ; the 

 lower head takes origin from the lateral surface of the lateral 

 pterygoid lamina (O.T. external pterygoid plate). The 

 muscle diminishes in width as it passes posteriorly, and it is 

 inserted into the fovea pterygoidea on the anterior surface 

 of the neck of the mandible, and also into the anterior margin 

 of the discus articularis of the temporo-mandibular articulation. 



