DISTRIBUTION OF THE PNEUMOGASTRICS 



535 



the glosso-pharyngeal and the superior cervical ganglion of the sympa- 

 thetic, to form what is known as the pharyngeal plexus. The ultimate 

 filaments of distribution pass to the muscles and the mucous membrane 



Fig. 131. Distribution of the pneumogastric (Hirschfeld). 



I, trunk of the left pneumogastric ; 2, ganglion of the trunk ; 3, anastomosis with the spinal acces- 

 sory ; 4, anastomosis with the sublingual ; 5, pharvngeal branch {the auricular branch is not shown in 

 the figure] ; 6, superior laryngeal branch ; 7, external laryngeal ner-ve ; 8, laryngeal plexus ; 9, 9, in- 

 ferior laryngeal branch ; 10, cervical cardiac branch ; n, thoracic cardiac branch; 12, 13, pulmonary 

 branches ; 14, lingual branch of the fifth ; 15, lower portion of the sublingual ; 16, glosso-pharyngeal; 

 17, spinal accessory ; 18, 19, 20, spinal nerves ; 21, phrenic nerve ; 22, 23, spinal nerves ; 24, 25, 26, 27, 

 28, 29, 30, sympathetic ganglia. 



of the pharynx. Physiological experiments have shown that the motor 

 influence transmitted to the pharyngeal muscles through the pharyngeal 

 branches of the pneumogastric is derived from the spinal accessory. 

 The superior laryngeal nerves are given off from the lower part of 



