THE HEAD AND NECK, POSTERIOR. 



137 



All these separate portions belong to the same filling of 

 connective tissue, and are grouped under the name of the 

 deep cervical fascia. 



These parts are continuous with one another, and are 

 only divisions of the general connective tissue of the neck, 



Diag. 9. A DIAGRAM OF THE CERVICAL FASCIA BELOW THE HYOID BONE. 

 (Modified from Gray.} i, Sternohyoid. 2, Omohyoid. 3, Sternothyroid. 4, 

 Trachea. 5, Thyroid gland. 6, Sternomastoid. 7, (Esophagus. 8. Common carotid. 

 9, Pneumogastric nerve. 10, Internal jugular, n, Longus colli. 12, Body of the sixth 

 cervical vertebra. 13, Vertebral foramen. 14, Scalenus anticus and rectus capitis 

 anticus major. 15, Scalenus medius and posticus. 16, Vertebral canal. 17, Semi- 

 spinalis colli. 18. Complexus (and biventer). 19, Splenius colli. 20, Levator anguli 

 scapulae. 21. Splenius capitis. 22, Trapezius. a, First layer enclosing sterno- 

 mastoid. b, Second layer enclosing the subhyoid muscles, c, Third layer enclosing 

 the vessels, thyroid gland, trachea, and oesophagus, d, Fourth (prevertebral) layer. 

 e, Ligamentum nuchse. 



so in order to properly describe it, to have a starting point, 

 its description must be taken up in parts and according to 

 an arbitrary classification. 



