SUBL1NGUAL NERVE 



or THE 

 UNIVERSITY 



OF 



519 



the muscular fibres of the tongue itself. The action of these muscles 

 and of the tongue itself in deglutition has already been fully discussed. 

 Properties and Uses of the Sublingual. The fact that the sublin- 

 gual nerve arises from a continuation of the motor tract of the spinal 

 cord and has no ganglion on its main root would lead to the suppo- 

 sition that it is an exclusively motor nerve. Experiments on the inferior 







Fig. 125. Distribution of the sublingual nerve (Sappey). 



I, root of the fifth nerve ; 2, ganglion of Gasser ; 3, 4, 5, 6, 7, 9, 10, 12, branches and anastomoses 

 of the fifth nerve; n, submaxillary ganglion; 13, anterior belly of the digastric muscle; 14, section of 

 the mylo-hyoid muscle; 15, glosso-pharyngeal nerve; 16, ganglion of Andersch ; 17, 18, branches of 

 the glosso-pharyngeal nerve; 19, 19, pneumogastric ; 20, 21, ganglia of the pneumogastric ; 22, 22, 

 superior laryngeal branch of the pneumogastric; 23, spinal accessory nerve; 24, sublingual nerve ; 

 25, descendens noni ; 26, thyro-hyoid branch; 27, terminal branches ; 28, two branches, one to the genio- 

 hyo-glossus and the other to the genio-hyoid muscle ; 8, chorda tympani. 



animals, taken in connection with the anatomical characters of the nerve, 

 render it almost certain that its root is devoid of sensibility at its origin. 

 All modern experimenters have confirmed the observations of Mayo and 

 of Magendie, in regard to the sensibility of the sublingual after it has 

 passed out of the cranial cavity. The anastomoses of this nerve with 

 the upper two cervical nerves, with the pneumogastric, and with the 

 lingual branch of the fifth, afford a ready explanation of this. 



