THE LINGUAL ARTERY. 



735 



Practical Considerations. — The superior thyroid artery or one of its branches 

 is frequently divided in cut-throat wounds. The sterno-mastoid branch may have 

 to be tied in the operation of ligation of the common carotid at the place of election 

 and the crico-thyroid branch during the performance of laryngotomy. 



Ligation. — The skin incision, two inches in length, with its centre opposite the 

 thyro-hyoid space, is made along the carotid line. After the superior thyroid veins 

 have been dealt with and the external carotid has been recognized, the vessel may 

 most easily be found in the sulcus between the upper border of the thyroid cartilage 



Fig. 691. 



Posterior branch of temporal 

 Anterior branch of temporal 



Middle temporal artery 



Branches of posterior 

 auricular artery 



Transverse facial artery 



Superficial temporal artery 



Great occipital nerve 



Trapezius 



/ 



Internal carotid ar 



Branch of ascending cervical 

 External carotid artery 



Levator anguli scapulae 



Common carotid artery 



Scalenus medius 



Transverse cervical 

 Posterior scapular 



Supra-orbital artery (shown 

 thro' cut in the muscles) 



Frontal artery 

 Nasal artery 



Angular artery 



Facial vein 

 Lateral nasal artery 



Termination of 



infra-orbital artery 

 Septal artery 



Superior coronary 

 Inferior coronary 



Buccinator 

 Inferior labial artery 



Masseteric branch 

 Facial artery 



Submental artery 

 ^^ "'^Muscular branch 



Submaxillary branch 



Superior thyroid artery 

 Thyro-hyoid muscle 



Sterno-ma'stoid branch 



Omo-hyoid muscle 



Sterno-hyoid muscle 



Sterno-thyroid nmscle 



Subclavian artery 



Subclavian vein 



Suprascapular artery 



Superficial dissection, showing arteries of neck, face and scalp. 



and the great vessels, where for a short distance it is superficial and runs almost 

 horizontally. 



The needle should be passed from above downward with the point directed some- 

 what towards the mid-line. The close pro.ximity posteriorly of the superior laryngeal 

 nerve should be remembered. 



2. The Lingual Artery. — The lingual artery (a. lingualis) (Fig. 692) usually 

 arises from the anterior surface of the external carotid, between the origins of the 

 superior thyroid and the facial, although it is sometimes given off from a trunk 



