602 THE CRAXIAL NERVES. 



the ganglion of Bochdalcl, from which branches are described as descending to the 

 alveolar process and gums of the incisor and canine teeth. (See Hyrtl's Lehrbuch, 

 p. 804.) 



(b) The outer branch gives filaments to the bicuspid teeth, and is connected with 

 the posterior dental nerve. 



TNFRAORBTTAL BRANCHES. 



The infraorbital branches, large and numerous, spring from the end of 

 the superior maxillary nerve beneath the elevator muscle of the upper lip, 

 and are divisible into palpebral, nasal, and labial sets. 



Fig. 407. 



Fig. 407. DEEP VIEW OP THE SpnENo-PALATiNE GANGLION, AND ITS CONNECTIONS WITH 

 OTHEK NEKVES, &c. (from Sappey after Hirschfeld and Leveille). f 



1, superior maxillary nerve ; 2, posterior superior dental ; 3, second posterior dental 

 branch ; 4, anterior dental ; 5, union of these nerves ; 6, spheno-palatine ganglion ; 7, 

 Vidian nerve ; 8, its great superficial petrosal t ranch ; 9, its carotid branch ; 10, a part 

 of the sixth nerve, receiving twigs from the carotid plexus of the sympathetic ; 11, superior 

 cervical sympathetic ganglion ; 12, its carotid branch ; 13, trunk of the facial nerve near 

 the knee or bend at the hiatus Fallopii : 14, glosso-pharyngeal nerve ; 15, anastomosing 

 branch of Jacobson ; 16, twig uniting it to the sympathetic : 17, filament to the fenestra 

 rotunda ; 18, filament to the Eustachian tube ; 19, filament to the fenestra ovalis ; 20, 

 external deep petrosal nerve uniting with the lesser superficial petrosal ; 21, internal deep 

 petrosal twig uniting with the great superficial petrosal. 



a. The palpebral branch (there are sometimes two branches) turns upwards to the 

 lower eyelid in a groove or canal of the bone, and supplies the orbicular muscle ; it 

 ends in filaments which are distributed to the eyelid in its entire breadth. At the 

 outer angle of the eyelids this nerve is connected with the facial nerve. 



b. The nasal branches, directed inwards to the muscles and integument of the side 

 of the nose, communicate with the cutaneous branch of the nasal nerve. 



c. The labial, the largest of the terminal branches of the upper maxillary nerve, 

 and three or four in number, are continued downwards beneath the proper elevator 

 of the upper lip. Eamifying as they descend, these nerves are distributed to the 

 integument, the mucous membrane of the mouth, the labial glands, and the muscles 

 of the upper lip. 



Near the orbit the infraorbital branches of the superior maxill try nerve 

 are joined by considerable branches of the facial nerve, the union between 

 the two being named infraorbital plexus. 



