154 



PEACTICAL PHYSIOLOGY 



passed under Wharton's duct, and one is tied. The chorda tympani is 

 then tetanised and the duct filled with saliva. A V-shaped slit is 



dig. 



FIG. 136. Dissection of the submaxillary (G.s.max) and sublingual glands and ducts 

 and the lingual nerve L. The chorda tympani leaves the lingual and runs along the 

 ducts. J.ext, external jugular vein ; V.G, branch of vein to gland ; Hyp, hypoglossal 

 nerve ; M.h., mylehyoid ; dig., digastric ; mass., masseter muscle. (Bernard). 



then made into the duct, and a fine glass or silver cannula inserted 

 and tied in. 



The sympathetic fibres run into the gland with the arteries. To 

 expose these the digastric muscle is divided close to its insertion on the 

 ct 



G.C 6. 



FIG. 137. Diagram of the submaxillary and sublingual glands and ducts and their 

 nerve supply from chorda tympani and sympathetic. F, facial ; Li, lingual ; ct, chorda 

 tympani; C.C.B., cervical sympathetic nerve; g 1 , submaxillary; g2, sublingual 

 gland ; c.wa, e.c ducts of glands. (Bernard.) 



jaw bone, and the posterior end of the muscle hooked back. A triangu- 

 lar cavity is thus exposed. The carotid artery with the nerves lie in 

 the lower part of this, while Wharton's canal and the artery of the 



