524 



THE NERVOUS SYSTEM. 



FIG. 307. View of the glossopharyngeal, pneumogastric, spinal accessory, and 

 hypoglossal nerves of the left side : 1, pneumogastric nerve in the neck ; 2, ganglion 

 of its trunk ; 3. its union with the spinal accessory ; 4, its union with the hypoglossal ; 

 5, pharyngeal hranch : 6, superior laryngeal nerve ; 7, external laryngeal ; 8, laryn- 

 geal plexus; 9, inferior or recurrent laryngeal; 10, superior cardiac branch; 11, 

 middle cardiac; 12, plexiform part of the nerve in the thorax; 13, posterior pul- 

 monary plexus ; 14, lingual or gustatory nerve of the inferior maxillary ; 15, hypo- 

 glossal, passing into the muscles of the tongue, giving its thyrohyoid branch, and 

 uniting with twigs of the lingual ; 16, glossopharyngeal nerve ; 17, spinal accessory 

 nerve, uniting by its inner branch with the pneumogastric, and by its outer passing 

 into the sternomastoid muscle ; 18, second cervical nerve ; 19, third ; 20, fourth ; 21, 

 origin of the phrenic nerve ; 22, 23, fifth, sixth, seventh, and eighth cervical nerves, 

 forming with the first dorsal the brachial plexus ; 24, superior cervical ganglion of 

 the sympathetic ; 25, middle cervical ganglion ; 26, inferior cervical ganglion united 

 with the first dorsal ganglion ; 27, 28, 29, 30, second, third, fourth, and fifth dorsal 

 ganglia (from Sappey, after Hirschfeld and Leveille). 



and the gastric branches. The pharyngeal branch is distributed 

 to the mucous membrane and muscles of the pharynx and to the 



