901 



superior, while the nasociliary nerve crosses the optic nerve to reach the medial 

 wall of the orbit. Beneath these is the optic nerve, surrounded in front by the 

 ciliary nerves, and having the ciliary ganglion on its lateral side, between it and the 

 Rectus lateralis. Below the optic nerve are the inferior division of the oculomotor, 

 and the abducent, the latter lying on the medial surface of the Rectus lateralis. 



THE FACIAL NERVE (N. FACIALIS; SEVENTH NERVE) (Figs. 788, 790). 



The facial nerve consists of a motor and a sensory part, the latter being frequently 

 described under the name of the nervus intermedius (pars intermedii of Wrisberg) 

 (Fig. 788). The two parts emerge at the lower border of the pons in the recess 

 between the olive and the inferior peduncle, the motor part being the more medial, 

 immediately to the lateral side of the sensory part is the acoustic nerve. 



Nucleus Salivatorius 



Superior Maxillary ff. 

 Vidian .V. 



Large Superficial Petrosal 



^== 



External 

 I Superficial Petrosal 



Post 

 Auricular Br. 



To Digasi 



To Stylo-hyoid 





Efferent (excito-glandular) 



fibers to submamllary and 



eublingual ganglia and glands 



FIG. 788. Plan of the facial and intermediate nerves and their communication with other nerves. 



The motor part supplies somatic motor fibers to the muscles of the face, scalp, 

 and auricle, the Buccinator and Platysma, the Stapedius, the Stylohyoideus, 

 and posterior belly of the Digastricus ; it also contains some sympathetic motor 

 fibers which constitute the vasodilator nerves of the submaxillary and sublingual 

 glands, and are conveyed through the chorda tympani nerve. These are pregan- 

 glionic fibers of the sympathetic system and terminate in the submaxillary ganglion 

 and small ganglia in the hilus of the submaxillary gland. From these ganglia 

 postganglionic fibers are conveyed to these glands. The sensory part contains 

 the fibers of taste for the anterior two-thirds of the tongue and a few somatic 



