SUBMAXILLARY REGION 



189 



The lateral surf ace is in relation, posteriorly, with the lower 

 part of the medial surface of the internal pterygoid, and 

 anteriorly with the medial surface of the body of the mandible, 

 below the mylo-hyoid ridge. The external maxillary artery, 

 as it lies in the groove in the posterior end of the gland, 

 and before it turns round the lower border of the man- 

 dible, runs forwards and downwards between this surface 





Parotid duct 



Accessory parotid gland 



M. pterygoideus 

 internus 



Mandible 

 imaxillary duct 

 Mucous membrane 

 Sublingual gland 



Tongue 



M. mylohyoideus 

 M. digastricus (anterior belly) 



Lingual nerve 

 /Mandible 



M. mylohyoideus 

 Surface of submaxil- 

 lary gland covered 

 by mandible 

 Surface covered by 

 integument and fasciae 



FIG. 69. Dissection of the Parotid, Submaxillary, and Sublingual Glands. 



and the internal pterygoid ; and the mylo-hyoid artery and 

 nerve lie between it and the body of the mandible before 

 they pass, more anteriorly, to the medial surface of the gland. 

 The medial surface is in relation with the mylo-hyoid and 

 hyoglossus, the lingual nerve and the submaxillary ganglion, 

 and the hypoglossal nerve. It overlaps the stylo-hyoid 

 muscle, both bellies of the digastric, and, sometimes, the 

 greater cornu of the hyoid bone. The deep part of the 

 gland and the duct both spring from the medial surface 



