374 NERVOUS SYSTEM. 
5. N. temporalis profundus.—One or more large branches 
passing mediad of the zygomatic arch to the temporal muscle. 
c. N. massetericus.—The masseteric nerve passes dorso- 
craniad to the masseter muscle. 
ad, N. pterygoideus.—One or more pterygoid branches 
pass to the pterygoid muscles. A small twig from the nerve 
to the interna] pterygoid passes into the tympanic cavity and 
supplies the tensor tympani muscle. 
e. N. buccinatorius (Fig. 154, ¢).—This passes craniad 
along the dorsolateral surface of the pterygoid muscles (Fig. 
154, 8) to the angle of the mouth. Here it divides into 
branches to the masseter muscle, the mucosa of the mouth, 
and to the lips. 
Fic. 154.—DIsSECTION SHOWING A NUMBER OF THE CRANIAL NERVES, 
The mandible and zygomatic arch have been cut and removed; the temporal and 
internal pterygoid muscles are also removed. a, N. hypoglossus; 4, N. lingualis; 
«, N, chorda tympani; @, N. alveolaris inferior (cut); ¢, N. buccinatorius: f, Nn. 
infraorbitales; g, N. sphenopalatinus; 4, branch of N. oculomotorius; 7, N. zygo- 
maticus; 7, N. lachrymalis; 4, N. abducens; /, N, trochlearis; 7, N. frontalis; , N. 
auriculotemporalis. 1, cut end of zygomatic process of temporal; 2, tympanic bulla; 
3, M. digastricus; 4, M. constrictor pharyngis medius; 5, M. hyoglossus; 6, M. 
genioglossus; 7, M. geniohyoideus; 8, M. pterygoideus externus (cut); 9, cut 
cranial end of zygomatic arch; 10, mandible (cut); 11, lachrymal gland. 
After giving off the above branches the mandibular nerve 
passes three or four millimeters laterad along the root of the 
zygomatic process of the temporal bone, and divides into two 
large branches, the inferior alveolar (or dental) nerve (@) and- 
the lingual nerve (4). 
