THE SUPERIOR MAXILLARY NERVE. 



239 



BRANCHES. Near its origin a fine recurrent branch (n. meninyeus medius) passes 

 to the dura mater and middle meningeal artery. In the spheno-maxillary fossa an 

 orbital or temporo-malar branch ascends from the superior maxillary nerve to the 



Fig. 157. SUPERIOR MAXILLARY 



NEIIVE AND SOME OF THE ORBITAL 



NERVES. (From Sappey, after 

 Hirschfeld and Leveilk'. ) I 



1, Gasserian ganglion ; 2, lachry- 

 mal nerve ; 3, trunk of the superior 

 maxillary nerve ; 4, its orbital branch ; 

 6, origin of its malar twig ; 7, its 

 temporal twig, joined by 5. the com- 

 municating branch from the lachrymal 

 nerve ; 8, spheno-palatine ganglion ; 

 9, Yidian nerve : 10, its upper branch 

 or great superficial petrosal nerve 

 proceeding to join 11, the facial 

 nerve ; 12, its lower branch or great 

 deep petrosal nerve joining the sympa- 

 thetic; 13, 14, posterior dental nerves; 

 16, terminal branches of the infra- 

 orbital nerve in the face ; 16, a branch 

 of the facial uniting with some of 

 the twigs of the infraorbital. 



orbit, and two spheuo-palatine branches descend to join Meckel's ganglion ; while 

 the nerve is in contact with the upper maxilla, it furnishes the superior dental or 

 alveolar branches ; and on the face are the terminal branches already indicated. 



Fig. 158. PLAN OF THE SUPERIOR MAXILLARY NERVE. (G. D. T.j 



Orbital branch. The orbital or temporo-malar branch (n. zygcmaticus}, a 

 small cutaneous nerve, enters the orbit by the spheno-maxillary fissure, and imme- 

 diately divides into two branches (temporal and malar), which pierce the malar bone, 

 and are distributed to the temple and the prominent part of the cheek. 



(a) The temporal branch (r. zygomaticotemporatts) is directed upwards in a 

 groove on the outer wall of the orbit, and leaves this cavity by the temporal canal 



Q2 



