3 20 



HEAD AND NECK 



lies, viz., to the side of the trachea, the cricoid cartilage, 

 and the thyreoid cartilage. Its posterior border is in relation 

 with the lateral margins of the oesophagus and the lateral 

 margin of the pharynx, and in many cases it overlaps the 

 common carotid artery. Its anterior border is connected with 



Anterior facial vein 



Mylo-hyoid' 



muscle 



Common facial 

 vein 



Lingual vein. 

 Small occipital N.. 

 Great auricular N. 

 Nervus 

 cutaneus colli' 

 nternal jugular vein" 

 Descending 

 cervical 

 nerves 

 Brachial. 1 

 plexus 

 External, 

 jugular vein 

 Descendens 

 hypoglossi 

 Anterior 

 jugular vein 



Inferio 

 thyreoid vein 





Platysma 



Kxternal mnxillan 

 artery 



Parotid gland 

 Submental lymph 



land 

 ubmaxillary glan 



Sterno-mastoid art 

 Ext. carotid arten 



Sup. thyreoid arte 

 Common carotid 

 artery 

 Lymph gland 



Thyreo-glossal du 

 Omo-hyoid 



Crico-thyreoid 

 Sterno-hyoid 



Isthmus of thyreoi 

 gland 



Sterno-thyreoid 



FIG. 126. Dissection of the Anterior Part of the Neck. The Right Sterno- 

 mastoid has been removed. 



the corresponding border of the opposite lateral lobe by the 

 isthmus. Above the isthmus it is in relation with the anterior 

 terminal branch of the superior thyreoid artery, and below the 

 isthmus with the commencement of the inferior thyreoid vein. 

 The isthmus of the thyreoid gland has already been seen 

 in the dissection of the middle line of the neck. It is a 

 band of varying width which lies anterior to the second, third, 



