THE FACIAL NERVE. 561 



junction of the temporal and intn mtf -maxillary veins; and this 

 common trunk, receiving some veins from the parotid, divides near 

 the angle of the jaw into two branches, the anterior of which passes 

 downwards to join the facial vein, while the posterior inclines back- 

 wards over the border of the sterno-mastoid muscle and is continued 

 into the external jugular vein (fig. 211, p. 582). Crossing the vessels nerves in 

 iu the gland from behind forwards is the trunk of the facial nerve, 

 which divides here into its primary branches. The superficial 

 temporal branch of the inferior maxillary nerve lies above the 

 upper part of the glandular mass ; and offsets of the great auricular 

 nerve pierce the gland at the lower part, and join the facial. 



In dissecting out the gland it has been seen to consist of a Obvious 

 number of lobules separated by connective tissue septa. From the 

 lobules small ducts arise, and these join together so as to give rise 

 to two large tubes, which are placed superficially to the branches 

 of the facial nerve in the gland, and by their union opposite the 

 hinder margin of the ramus of the jaw form the beginning of 

 Stenson's duct. As it crosses the masseter the main duct receives 

 one or more small branches from the socia parotidis. 



The parotid receives its arteries from the external carotid ; and Vessels and 

 its nfrrts from the sympathetic, auriculo-temporal of the fifth, and ne 

 facial. Its ly mpli a tics join those of the neck. 



T\vo or three small molar glands lie on the surface of the buccina- Molar 

 tor, and open into the mouth near the last molar teeth by separate g ' 

 ducts. 



The FACIAL XERVE (fig. 205, p. 562), or the seventh cranial Outline of 

 nerve, is the motor nerve of the superficial muscles of the head 

 and face. Numerous communications take place between it and 

 the fifth nerve ; the chief of these are found above and below the 

 orbit, and over the side of the lower jaw. 



Dissection. The trunk of the nerve is concealed by the parotid Dissection 

 gland, but its ramifications are mostly in front of the glandular 

 mass, and will be displayed in the removal of the gland. 



The different branches are to be traced forwards as they escape beyond 

 from beneath the anterior border of the gland and followed to P arotld> 

 their termination. 



The highest branches to the temple have already been partly on temple, 

 dissected above the zygomatic arch ; and their junction with the 

 temporal branch of the superior maxillary, and with the supra- 

 orbital nerve has been seen. Some still smaller branches are to be in eyelids, 

 traced to the outer part of the orbit, where they enter the eyelids 

 and communicate \vith the other palpebral nerves ; as these cross 

 the malar bone, a junction is to be found with the subcutaneous 

 malar branch of the fifth nerve. 



With the duct of the parotid are two or more large branches, in the face, 

 which are to be followed below the orbit to their junction with 

 the infraorbital, nasal, and infratrochlear nerves. 



The remaining branches to the lower part of the face are on lower 

 smaller. One runs with the buccal nerve over the lower part of jaw< 

 the buccinator muscle ; and one or two others are to be traced 



D.A. o o 



