128 



HEAD AND NECK 



two mylo-hyoid muscles, whilst bisecting the floor of the 

 triangle, in the median plane, is the fibrous raphe into which 

 those muscles are inserted. Not infrequently the medial 

 margins of the digastric muscles send decussating fibres across 

 the interval. Within the submental triangle are the submental 





Anterior facial vein 



M. mylohyoideus 



Common facial 

 vein 



Lingual vein 

 Lesser occipital N. 

 Great auricular N. 

 Nervus 

 cutaneus colli 

 I nternal j ugular vei 

 Descending 

 cervical-- 

 nerves/ 

 Brachiall 

 plexus \ 

 External^, 

 jugular vein 

 Descendens 

 hypoglossi 

 Anterior 

 jugular vein 



Inferior 

 thyreoid veins 



Platysma 



External maxillj 

 artery 

 Parotid gland 



- Submental lymp 



land 

 ubmaxillary gl; 



Sterno-mastoid a 

 Ext. carotid artt 



Sup. thyreoid ai 

 Common carotid 

 artery 



Lymph gland 



Thyreo-glossal c 

 M. omohyoideu 



M. cricothyreoi< 

 M. sternohyoid( 



Isthmus of thyn 

 gland 



M. sternothyreo 



FIG. 44. Dissection of the Front of the Neck. The Right Sterno-mastoid 

 has been removed. 



glands, which receive lymph from the median part of the 

 lower lip and chin and the anterior part of the tongue. 



In the median area of the infra-hyoid part there is a 

 narrow intermuscular interval, bounded on each side, above, 

 by the medial margins of the sterno-hyoid muscles, and to a 

 smaller extent, below, by the medial margins of the sterno- 

 thyreoid muscles (Fig. 44); more laterally lie the anterior bellies 



