1382 



SUEFACE AND SUKGICAL ANATOMY. 



of the lingual tonsils in the living subject the laryngoscopic mirror must be 

 employed. 



Inferior concha 



Internal pterygoid / Soft palate 



External pterygoid 



__l *, - - ^M^^^HK^B i / 1 *-*.. *. -, . VulfcmvOWElMlf , 



-Temporal muscle 



Styloglossus 



Inferior alveolar 



vessels and nerve 



Lingual nerve 



External maxillary 

 artery 



Superficial part of 

 submaxillary gland 

 Submaxillary duct 



Deep part of 

 submaxillary gland 

 Hypoglossal nerve 



Lingual artery 



Hyoglossus 



Mylo-hyoid 

 Digastric tendon 



Genio-hyoid 



FIG. 



Tongue 



Inferior alveolar 

 vessels and nerve 



External maxillary 

 artery 



Mylo-hyoid 



Lingual nerve 



Deep part of submaxillary gland 

 ubmaxillary duct 

 Hypoglossal nerve 

 Lingual artery 

 Digastric 

 Hyoglossus 

 Genio-hyoid 



PLANE BEHIND 



1083. FRONTAL SECTION THROUGH THE TONGUE AND SUBMAXILLARY REGION IN 

 THE MOLAR TEETH (from Cunningham). 



The philtrum 



\ Anterior lingual 



* Layer of muscle cut 

 f to show the gland 



Plicae fimbriatse 



Frenum linguae 



Submaxillary duct 



Openings of sub- 

 maxillary ducts 



-^ Sublingual gland 



Plica sublingualis, 

 with openings of 

 ducts of sublingual 

 gland 



FIG. 1084. OPEN MOUTH WITH TONGUE RAISED AND THE 



SUBLINGUAL AND ANTERIOR LINGUAL GLANDS EXPOSED. 

 The subliugual gland of the left side has been laid bare by 

 removing the mucous membrane ; to expose the anterior 

 lingual gland of the right side a thin layer of muscle, in 

 addition to the mucous membrane, has been removed. A 

 branch of the lingual nerve is seen running on the medial 

 aspect of the' gland. The profunda vein is faintly indi- 

 cated on this side also (from Birmingham). 



The pair of mucous glands situ- 

 ated on the inferior surface of the 

 tongue a little behind its tip, and 

 known as the anterior lingual glands, 

 are of interest in that they occasion- 

 ally give rise to mucous cysts 

 similar to those which develop in 

 connexion with the labial glands 

 (Fig. 1084). 



The muscular bundles of the 

 tongue are separated by a quantity 

 of loose connective tissue, rich in 

 blood- and lymph vessels (Fig. 

 1083); hence acute inflammatory 

 oedema of the substance of the 

 tongue may be attended with a 

 degree of swelling sufficient to ob- 

 struct the respiratory passage. 



The main blood-vessels of the 

 tongue run from behind forwards, 

 nearer its inferior than its superior 

 surface (Fig. 1083) ; incisions into 

 the substance of the tongue to 

 reduce swelling and tension should, 

 therefore, be made longitudinally 

 upon the dorsum. Bleeding from 

 the lingual artery, divided in the 

 substance of the tongue, is tem- 

 porarily arrested by passing the 

 finger behind the base of the tongue 

 and hooking it well forward, so as 

 to compress the vessel against the 

 lingual surface of the mandible. 



