466 APPENDIX. 



sympathetic and vagus nerves. Follow the vagus (p. 378) first 

 craniad; transect the muscles as necessity arises, and find its ganglion 

 nodosum and at the same time locate the superior cervical ganglion 

 of the sympathetic nerve (p. 404, and Fig. 156). Then find the 

 hypoglossal nerve (Fig. 156, b], passing outside of the carotid artery 

 to the tongue, and the accessory (Fig. 156, c], passing to the tra- 

 pezius. Cut and reflect the digastric muscle and find the small 

 glossopharyngeal nerve (Fig. 156, a), passing to the surface of the 

 bulla and then beneath the carotid artery. 



2. Follow the vagus (p. 378) caudad to its termination. To do 

 this it is necessary to remove one side of the thorax, as in dissecting 

 the blood-vessels. Do not injure the nerves of the axilla, nor the 

 phrenic or sympathetic nerves. For the vagus in the thorax, com- 

 pare Fig. 157. Find the branches of the nerve; in dissecting them, 

 pull on them to make them tense. They are then more easily 

 visible. To dissect the abdominal portion of the vagus, open the 

 abdominal cavity, and compare Fig. 164 (p. 407). 



3. Dissect the sympathetic (p. 404), following it and its branches 

 to the pelvic region (Figs. 156, 157, and 164). 



4. The hypoglossal (p. 383, and Fig. 156, b). 



5. The glossopharyngeal (p. 378, and Fig. 156, a). 



6. The accessory nerve (p. 382, and Fig. 156, c; Fig. 158, i). 

 Cut away a portion of the tympanic bulla and the base of the 



skull, sufficient to follow these nerves in the jugular foramen, to the 

 brain. 



7. Locate the stylomastoid foramen and pick away overlying 

 tissue until the facial nerve is found emerging and then follow its 

 branches to their distribution (p. 375, and Fig. 155). 



8. Expose the ventral surface of the pterygoid muscles just 

 mediad of the angle of the jaw. Divide and reflect them, and the 

 mandibular division of the fifth nerve (p. 373, and Fig. 154) will be 

 found dorsad of them and of the internal maxillary artery. The 

 chorda tympani (p. 375) passes ventrad of the artery to join the 

 lingual. Follow out (i) the lingual branch (p. 375) (with the chorda 

 tympani), and (2) the inferior alveolar (p. 375) by cutting away the 

 ventral border of the mandible. Then cut the mandible near the 

 canine tooth, and pull it to one side, and follow out the muscular 

 branches of the mandibular nerve. 



9. Remove the mandible and find the maxillary nerve (p. 371) 

 emerging from the foramen rotundum. Follow its branches and find 

 the sphenopalatine ganglion (p. 372). 



10. Remove the zygoma so as to expose the whole ventral aspect 

 of the orbit. Carefully pick away the fat in the orbit without injuring 

 any nerves, so as to expose the four recti muscles and the inferior 

 oblique (see p. 411, and Fig. 166). Find the abducens nerve 

 (P- 375 an d Fig- 154), entering the dorsal edge of the lateral rectus, 

 and follow it back. Look on the inner surface of the inferior rectus 

 for the branch of the third nerve (p. 369) which supplies it. Find 



