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HANDBOOK OF PHYSIOLOGY. 



tory afferent impulses to the vaso-motor centre ; (6) excito-secretory 

 to the salivary glands; (?) excito-motor in coughing, vomiting, etc. 

 Effects of Section. Division of both vagi, or of both their recurrent 



Fig. 368. View of the nerves IX, X, and XI, their distribution and connections on the left 

 side. 2-5. 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 branch ; 6. superior laryn- 

 geal nerve; 7, external laryngeal ; 8, laryngeal plexus; 9. inferior or recurrent laryngeal ; 10, 

 superior cardiac branch; 11, middle cardiac; 12, plexiform part of the nerve in the thorax; 13, 

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

 glossal, passing into the muscles of the tongue, giving its thyro-hyoid branch, and uniting with 

 twigs of the lingual; 16, glosso-pharyngeal nerve; IT, spinal accessory nerve, uniting by its 

 inner branch with the pneumogastric. and by its outer, passing into the sterno-mastoid 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, su- 

 perior 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 Leveill6.) 



branches, is often very quickly fatal in young animals; but in old ani- 

 mals the division of the recurrent nerve is not generally, and that of 

 both the vagi is not always, fatal, and, when it is so, death ensues slowly. 



