THE SUPERIOR MAXILLARY NERVE. 653 



it furnishes one or more offsets to the gum and the mucous mem- 

 brane of the cheek. 



Aft>T tli'. nervt becomes the infraorbital it gives off 



d. and e. The middle and anterior dental branches which arise to fore 

 together or separately from the trunk in the floor of the orbit, and teeth ' 



ticl in special canals in the wall of the antrum to end in branches 

 to the teeth, after forming loops of communication with one another, 

 and with the posterior dental nerve. From the middle branch 

 filaments are given to the bicuspid teeth ; and from the anterior to 

 the canine and incisors, as well as a twig or two to the inferior 

 meat us of the nose. 



The terminal branches on the face, palpebrcd, lateral nasal and to lower 

 labial, have already been studied (p. 564). 



The INFRAORBITAL ARTERY is a branch of the internal maxillary infraorbital 

 in the spheno-maxillary fossa (p. 615). Taking the course of the arter y 



FIG. 231. DIAGRAM OF THE SUPERIOR MAXILLARY NERVE. 



2. Trunk of the nerve leaving the 5. Posterior dental nerves. 

 Gasserian ganglion. 6. Middle and anterior dental. 



3. Spheno-palatine branches. 7. Facial branches. 



4. Temporo-malar branch. 



nerve through the infraorbital canal, the vessel appears on the face 

 beneath the elevator muscle of the upper lip ; and it ends in branches 

 which are distributed, like those of the nerve, between the eye and ends in 

 mouth. On the face its branches anastomose with offsets of the facial face : 

 and buccal arteries. In the canal in the maxilla the artery furnishes |jjy t che8 to 

 small twigs to the orbit, and a larger anterior dental branch which and O ' ne ^ 

 runs with the nerve of the same name to the incisor and canine JJ* 1 ?^ 01 

 teeth ; the dental branch also gives offsets to the antrum, and near 

 the teeth it anastomoses with the posterior dental artery. 



The vein accompanying the artery communicates in front with the infraorbital 

 facial vein, and terminates behind in the alveolar plexus. 



Direction. The examination of an eyeball may be omitted with 

 advantage till after the dissection of the head and neck has been 

 completed. 



