812 THE NERVOUS SYSTEM. 



the side of the head, face, and upper part of the neck, supplying the superficial 

 muscles in these regions. As the primary branches and their offsets diverge from 

 each other they present somewhat the appearance of a bird's claw ; hence the 

 name of pes anserinus is given to the divisions of the facial nerve in and near the 

 parotid gland. 

 The branches of communication of the facial nerve may be thus arranged : 



In the internal auditory T-,I . r , 



J VV ith the auditory nerve, 

 meatus .... 



With Meckel's ganglion by the large superficial 



potrosal nerve. 

 With the otic ganglion by the small superficial 



petrosal nerve. 



In the aquseductus Fallopii 



With the sympathetic on the middle meningeal 



Jby the external superficial petrosal nerve. 



'auricular branch of the pneumo- 

 ga'Stric. 

 ^--With the glosso-pharyngeal (Digastric). 



With the pneumogastric (Posterior auricular). 



After its exit from the stylo- -IIT-..I .1 , i i /ox i u -j\ 



,, J < With the carotid plexus (fetylo-hyoid). 



mastoid foramen . I nrvLi. 1. i VD i \ 



With the auricularis magnus (Posterior auricular). 



^ With the auriculo-temporal (Temporal). 

 On the face . . . With the three divisions of the fifth. 



In the internal auditory meatus some minute filaments pass between the facial 

 and auditory nerves. 



Opposite the hiatus Fallopii the gangliform enlargement on the facial nerve 

 communicates with Meckel's ganglion by means of the large superficial petrosal 

 nerve, which forms its motor root ; with the otic ganglion, by the small superficial 

 petrosal nerve ; and with the sympathetic filaments accompanying the middle 

 meningeal artery, by the external petrosal (Bidder). From the gangliform enlarge- 

 ment, according to Arnold, a twig is sent back to the auditory nerve. 



Just before leaving the aqueduct a twig joins the auricular branch of the 

 pneumogastric nerve. 



Just after its exit from the stylo-mastoid foramen it communicates with the 

 following nerves by means of its respective branches : With the auricular branch 

 of the pneumogastric and auricularis magnus of the cervical plexus, by the Pos- 

 terior auricular branch ; with the glosso-pharyngeal, by the digastric ; with the 

 carotid plexus, by the stylo-hyoid; and with the auriculo-temporal, by its tem- 

 poral branches. 



BRANCHES OF DISTRIBUTION. 



Within the aqueductus Fallopii . 



, i ( Posterior Auricular. 

 At its exit from the stylo-mastoid J j)j gagtr i c 



ft^n \Stylo-hyoid. 



( Temporal. 

 , Temporo-facial < Malar. 



I Infra-orbital. 

 On the face < fBuccal. 



^ Cervico-facial < Supramaxillary. 

 (Inframaxillarx . 



The tympanic branch arises from the nerve opposite the pyramid ; it passes 

 through a small canal in the pyramid and supplies the Stapedius muscle. 



The chorda tympani is given off from the facial as it passes vertically down- 



