THE ANTERIOR PART OF THE NECK 139 



FIG. 49. Dissection to show the structures under cover of the Sterno-Mastoid 

 Muscle. The outline of the sterno-mastoid is indicated by the thick black 

 broken lines. The greater part of the internal jugular vein has been 

 removed to display the parts subjacent to it. 



Digastric muscle (posterior belly). 



Parotid gland. 



Commencement of external - jugular 



vein. 



Internal jugul;ir vein. 

 Hypoglossal nerve. 

 Internal carotid artery. 

 External carotid artery. 

 Anterior facial vein. 

 Submental vessels. 

 Submaxillary gland. 

 Anterior belly of digastric muscle. 

 Mylo-hyoid muscle. 

 Laryngeal branch of superior thyreoid 



artery and internal laryngeal nerve. 

 Superior thyreoid artery. 

 Upper end of thyreoid gland. 

 Ansa hypoglossi. 

 Sterno-thyreoid muscle. 

 Sterno-hyoid muscle. 

 Common carotid artery. 

 Vagus nerve. 



21. Internal jugular vein. 



22. External jugular vein. 



23. Subclavian vein below transverse 



scapular artery. 



24. Subclavian artery. 



25. Omo-hyoid muscle. 



26. Long thoracic nerve. 



27. First serration of serratus anterior 



muscle. 



28. Trapezius muscle. 



29. Scalenus anterior muscle. 



30. Scalenus medius muscle. 



31. Upper part of brachial plexus. 



32. Phrenic nerve. 



33. Nervus cutaneus colli. 



34. Great auricular nerve. 



35. Longus capitis muscle. 



36. Ascending cervical artery. 



37. Accessory nerve. 



38. Levator scapulae. 



39. Splenius capitis muscle. 



40. Sterno-mastoid muscle. 



