256 



INTERNAL MAXILLARY ARTERY. 



temporal muscle ; but the interior branch sends a small twig 

 into the orbit of the eye. 



r. There are some small branches which pass to the Ptery- 

 goid Muscles and to the Masseter, which arise either from 

 the internal maxillary artery, or from the interior deep tempo- 

 ral. They are generally small, and often irregular. 



3. Branches given off apposite the Ptery go-maxillary 



Fissure. 



G. An artery, particularly appropriated to the cheek, called 

 buccal or buccinator, perforates the buccinator muscle from 

 within outwards, and generally terminates on the buccinator, 

 the zygomaticus major, and the muscles of the lips. This Ar- 

 tery of the Cheek is very irregular in its origin, sometimes 

 arising from the internal maxillary, sometimes from the deep 

 temporal, and sometimes from the suborbitary, or from the 

 alveolar artery, to be immediately described. 



H. The Alveolar Artery or the Artery of the Upper Jaw 

 (superior dental) arises generally from the internal maxillary, 

 but sometimes from one of its branches. It winds round the 

 tuberosity of the upper jaw, and sends branches to the bucci- 

 nator muscle, to the bone and the gums, to the antrum High- 

 morianum, and some of the molar teeth : and also to the teeth 

 generally, by means of canals somewhat analogous to that of 

 the lower jaw. 



i. The Infra orbital Artery arises from the internal maxil- 

 lary in the zygomatic fossa, and soon enters the infra orbital 

 canal, through which it passes to the face, and emerges below 

 the orbit of the eye, supplying the muscles in the vicinity, and 

 anastomosing with the small ramifications of the two last 

 described arteries, and those of the facial artery and the 

 ophthalmic. 



This artery in its course sends off small twigs to the perios- 

 teum, the adipose membrane, and the muscles in the inferior 

 part of the orbit, and also to the great maxillary sinus or antrum 

 Highmorianum, and to the canine and incisor teeth. 



