602 



THE VASCULAR SYSTEMS 



to and a little below the auriculotemporal nerve; it crosses the inferior dental nerve, 

 and lies along the lower border of the External pterygoid muscle. 



The second or pterygoid portion runs obliquely forward and upward under cover 

 of the ram us of the mandible, on the outer (very frequently on the inner) surface of 

 the External pterygoid muscle; it then passes between the two heads of origin 

 of this muscle and enters the sphenomaxillary fossa. 



Post. temp, arter 



Incisor. 



Fir.. 444. The internal maxillary artery and its branches. 



Anterior deep temporal 

 External pterygoid- 

 Posterior deep temporal 



Small. meningeal 

 Middle meningeal 



Tympanic 

 Deep auricular 



Pterygopalatine 

 T'fY/iVni 



Descending palatine 

 Spheuopalatlne 



Infraorbital 



Superior alveolar 



Sphenomaxillary Div. 

 Slasaeteric Buccal 



Inferior dental 



Internal pterygoid 



FIG. 445. Plan of the branches of the internal maxillary artery. 



The third or sphenomaxillary portion lies in relation with Meckel's ganglion. 

 The branches of this vessel may be divided into three groups, corresponding 

 with its three divisions. 



Branches of the maxillary portion (Fig. 445) : 



Anterior tympanic. Middle meningeal or Medidural. 



Deep auricular. Small meningeal or Parvidural. 



Inferior dental. 



