FACIAL. 613 



with which, it accompanies it to the submaxillary gland ; it then joins the sub- 

 maxillary ganglion, and terminates in the Lingualis muscle. 



The posterior auricular nerve arises close to the stylo-mastoid foramen, and 

 passes upwards in front of the mastoid process, where it is joined by a filament 

 from the auricular branch of the pneumogastric, and communicates with the 

 deep branch of the auricularis magnus; as it ascends between the meatus and 

 mastoid process it divides into two branches. The auricular branch supplies the 

 Retrahens Aurem. The occipital branch, the larger, passes backwards along the 

 superior curved line of the occipital bone, and supplies the occipital portion of 

 the Occipito-frontalis. 



The stylo-hyoid is a long slender branch, which passes inwards, entering the 

 Stylo-hyoid muscle about its middle ; it communicates with the sympathetic fila- 

 ments on the external carotid artery. 



The digastric branch usually arises by a common trunk with the preceding ; 

 it divides into several filaments, which supply the posterior belly of the Digas- 

 tric ; one of these perforates that muscle to join the glosso-pharyngeal nerve. 



The Temporo-facial, the larger of the two terminal branches, passes upwards 

 and forwards through the parotid gland, crosses the neck of the condyle of the 

 jaw, being connected in this situation with the auriculo-temporal branch of the 

 inferior maxillary nerve, and divides into branches, which are distributed over 

 the temple and upper part of the face ; these are divided into three sets, tem- 

 poral, rnalar, and infraorbital. 



The temporal branches cross the zygoma to the temporal region, supplying 

 the Attrahens Aurem muscle, and join with the temporal branch of the supe- 

 rior maxillary, and with the auriculo-temporal branch of the inferior maxillary. 

 The more anterior branches supply the frontal portion of the Occipito-frontalis, 

 and the Orbicularis Palpebrarum muscle, joining with the supraorbital branch 

 of the ophthalmic. 



The malar branches pass across the malar bone to the outer angle of the orbit, 

 where they supply the Orbicularis and Corrugator Supercilii muscles, joining 

 with filaments from the lachrymal and supraorbital nerves ; others supply the 

 lower eyelid, joining with filaments of the malar branches of the superior 

 maxillary nerve. 



The infraorbital, of larger size than the rest, pass horizontally forwards to be 

 distributed between the lower margin of the orbit and the mouth. The super- 

 ficial branches run beneath the skin and above the superficial muscles of the 

 face, which they supply ; some supply the lower eyelid and Pyramidalis Nasi, 

 joining at the inner angle of the orbit, with the infratrochlear and nasal branches 

 of the ophthalmic. The deep branches pass beneath the Levator Labii Superi- 

 oris, supply it and the Levator Anguli Oris, and form a plexus (infraorbital) by 

 joining with the infraorbital branch of the superior maxillary nerve. 



The Cervico-facial division of the facial nerve passes obliquely downwards 

 and forwards through the parotid gland, where it is joined by branches from 

 the great auricular nerve ; opposite the angle of the lower jaw it divides into 

 branches which are distributed on the lower half of the face and upper part of 

 the neck. These may be divided into three sets : buccal, supramaxillary, and 

 inframaxillary. 



The buccal branches cross the Masseter muscle, join the infraorbital branches 

 of the temporo-facial division of the nerve, and with filaments of the buccal 

 branch of the inferior maxillary nerve. They supply the Buccinator and 

 Orbicularis Oris. 



The supramaxillary branches pass forwards beneath the Platysma and Depres- 

 sor Anguli Oris, supplying the muscles of the lip and chin, and anastomosing 

 with the mental branch of the inferior dental nerve. 



The inframaxillary branches run forwards beneath the Platysma, and form a 

 series of arches across the side of the neck over the supra-hyoid region. One 

 of these branches descends vertically to join with the superficial cervical nerve 

 from the cervical plexus ; others supply the Platysma. 



