978 



THE NERVOUS SYSTEM 



that it gives filaments to the base of the tongue and to the stylo-glossus and glosso- 

 palatinus (palato-glossus) . 



The Terminal Divisions. In the substance of the parotid gland the two terminal 

 divisions of the facial nerve lie superficial to the external carotid artery and to.the 

 posterior facial (temporo-maxillary) vein. The way in which these terminal divisions 

 give off their branches varies much in different subjects and often on the opposite 

 sides of the same subject. ( )ne of the more common methods is here described. 



The temporo-facial or upper division runs upwards and forwards, and, after 

 receiving communicating twigs from the auricula-temporal nerve, gives off temporal 

 and zygomatic (malar) branches. The cervico-facial or lower division runs down- 

 wards and forwards, receives branches of communication from the great auricular 



FIG. 705. SUPERFICIAL DISTHIHVTION OF THE FACIAL AND OTHER NERVES OF 

 THE HEAD. (After Hirschfield and LeveilU:.} 



SUPRA-ORBITAL 



PALPEBRAL TWIG 

 OFLACHHy.1l.ll. 

 IXFRA TK<>rifI.K.\ R 



TEMPORAL 



BRANCH 



KKVKNTH 

 ZYGOMATIC 



BR. OF 

 SEVENTH 

 MAXILLARY 

 It IV. i IF FIFTH 

 1XFRA- 

 ORBITAL 



11 R. OF SEVENTH 



HI CCAL ltl!A.\r/f 

 OF SEVENTH 



HKXTAL BRANCH 



OF MANDlHl'lj.Mi' 



SUPRA -MA NDIB ULA R 



HI! l.M'H OFKKVKXTIl 



INFRA-MANDIBVLAR BRANCH 

 ( RAMUS COLLJ) OF SEVENTH 



[ POSTERIOR 



r AI'HH'n.AR 



A riiK'i'i.o- 



TEMPORAL 

 ,/,'/; i r 

 OCCIPITAL 



FACIAL 



/,// :/: Di-ci 



<Jl!K.\ T .1 I'llKTI.AR 



(V.V.MV .I/. 

 CUTANEOUS 



nerve, and gives off (1) buccal branches, comprising what have been called infra- 

 orbital and buccal branches; (2) the muri/ii/itl inandilndar (supra-mandibular) 

 branch; and (3) the ramus colli (infra-mandibular branch). These branches from 

 the two terminal divisions anastomose freely to form the parotid plexus (pes 

 anserinus) . 



The temporal branches passing upwards communicate freely with each other and 

 with the zygomatic branches. They also communicate with the zygomatico-tem- 

 poral branch of the zygomatic nerve (the orbital branch of the maxillary nerve) and 

 with the supra-orbital nerve. They supply the frontalis, orbicularis oculi, corrugator 

 supercilii, and auricularis anterior and superior (fig. 705). 



The zygomatic (malar) branches passing upwards and forwards, communicate 



