146 



THE HEAD AND NECK 



The Submaxillary Lymph Glands may be divided into two 

 groups : 



(a) The anterior group lies in the anterior part of the space, 

 between the mylo-hyoid and the deep surface of the mandible. 

 They receive afferents from the anterior part of the tongue and 



Maxilla.. 

 Tooth abscess - 

 Muco-periosteum of palate - 



Tongue 



Periosteum 



Tooth abscess 



Maxillary sinus 

 Inferior meatus 



Alveolar abscess 

 Maxilla 



Mucous mem- 

 brane of cheek 



j-Submaxillary duct 



Lingual nerve 

 Genio-glossus 

 Sublingual gland 



Genio-hyoid 



Skin ' 



Digastric, ant. belly 



Lymph gland / 



Deep cervical fascia 



c Abcess 



v Mylo-hyoid 



Hyoid bone 



FIG. 45. Frontal Section through the Mouth. Four varieties of alveolar 

 abscess are shown. In the maxilla, on the right side, the pus has spread 

 laterally, forming an abscess under the mucous membrane ; on the left 

 side, it has spread medially, forming a palatal abscess. In the mandible, 

 on the right side, the pus has perforated the bone medial to the attach- 

 ment of the deep cervical fascia, forming an abscess which is covered by 

 the fascia and the skin ; on the left side, the pus has perforated the bone 

 outside the deep fascia, forming an abscess immediately under the skin. 



floor of the mouth, from the lower lip and teeth of the lower 

 jaw, and from the submental lymph glands. 



(b) The posterior group lies in relation to the deep and super- 

 ficial aspects of the submaxillary salivary gland. The superficial 

 glands receive afferents from the lips, gums, and teeth, ard 

 from the anterior group. When enlarged they are usually 

 tuberculous, and the infection can be traced to the teeth. The 

 deep glands drain the lateral part of the tongue and floor of the 



