406 



SUPERIOR LARYNGEAL NERVE. 



Fig. 183* 



Cardiac, 



Inferior or recurrent laryngeal, 



Pulmonary anterior, 



Pulmonary posterior, 



(Esophageal, 



Gastric. 



The Branches of communication form part of the complicated plexus at 

 the base of the skull. The branches to the ganglion of Andersch are given 

 off by the superior ganglion in the jugular fossa. 



The Auricular nerve is given off from the 

 lower part of the jugular ganglion, or from the 

 trunk of the nerve immediately below, and re- 

 ceives immediately after its origin a small branch 

 of communication from the glosso-pharyngeal. 

 It then passes outwards behind the jugular vein, 

 and on the outer side of that vessel enters a small 

 canal (page 68) in the petrous portion of the 

 temporal bone near the stylo-mastoid foramen. 

 Guided by this canal it reaches the descending 

 part of the aqueductus Fallopii and joins the fa- 

 cial nerve. In the aqueductus Fallopii the auri- 

 cular nerve gives off two small filaments, one of 

 which communicates with the posterior auricular 

 branch of the facial, while the other is distri- 

 buted to the pinna. 



The Pharyngeal nerve arises from the pneu- 

 mogastric, immediately above the gangliform 

 plexus, and descends behind the internal carotid 

 artery to the upper border of the middle constric- 

 tor, upon which it forms the pharyngeal plexus 

 assisted by branches from the glosso-pharyngeal, 

 superior laryngeal, and sympathetic. The pha- 

 ryngeal plexus is distributed to the muscles and 

 mucous membrane of the pharynx. 



The Superior laryngeal nerve arises from the 

 gangliform plexus of the pneumogastric, of which 

 it appears to be almost a continuation ; hence 

 this plexus was named by Sir Astley Cooper the 

 "ganglion of the superior laryngeal branch." 

 The nerve descends behind the internal carotid 

 artery to the opening in the thyro-hyoidean mem 

 brane, through which it passes with the superior 

 laryngeal artery, and is distributed to the mucous 

 membrane of the larynx and arytenoideus muscle. 

 On the latter, and behind the cricoid cartilage, 



Origin and distribution of the eighth pair of nerves. 1, 3, 4. The medulla oblongata. 

 1 Is the corpus pyramidale of one side. 3. The corpus olivare. 4. The corpus resti- 

 forme. 2. The pons Varelii. 5. The facial nerve. 6. The origin of the glosso-pharyn- 

 geal nerve. 7. The ganglion of Andersch. 8. The trunk of the nerve. 9. The spinal 

 acrrssory nerve 10. The ganglion of the pneumogastric nerve. 11. Its plexiform gan- 



