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DEEP CERVICAL FASCIA. 



of the omo-hyoid muscle, and may thence be traced behind the clavicle, 

 where it encloses the subclavius muscle, and, being extended from the 

 cartilage of the first rib to the coracoid process, constitutes the costo- 

 coracoid membrane. In front of the sterno-mastoid muscle, the deep 



Fig. ill. 



fascia is attached to the border of the lower jaw and os hyoides, and 

 forms a distinct sheath for the submaxillary gland. Inferiorly it 

 divides into two layers, one of which passes in front of the sternum, 

 while the other is attached to its superior border. 



* A transverse section of the neck, shewing the deep cervical fascia and its 

 numerous prolongations, forming sheaths for the different muscles. As the 

 figure is symmetrical, the figures of reference are placed only on one side. 

 1. The platysma myoides. 2. The trapezius. 3. The ligamentum nuchae, 

 from which the fascia may be traced forwards beneath the trapezius, enclosing 

 the other muscles of the neck 4. The point at which the fascia divides, to 

 form a sheath for the stemo-mastpid muscle (5). 6. The point of reunion of 

 the two layers of the sterno-mastoid sheath. 7- The point of union of the deep 

 cervical fascia of opposite sides of the neck. 8. Section of the sterno-hyoid. 

 9- Omo-hyoid. 10. Sterno-thyroid. 1 1 . The lateral lobe of the thyroid gland . 

 12. The trachea. 13. The oesophagus. 14. The sheath containing the com- 

 mon carotid artery, internal jugular vein, and pneumogastric nerve. 15. The 

 longus colli The nerve in front of the sheath of this muscle is the sympathetic. 

 16. The rectus anticus major. 17. Scalenus anticus. 18. Scalenus posticus. 

 19- The splenius capitis 20. Splenius colli, 21. Levator anguli scapulae. 

 22. Complexus. 23. Trachelo-mastoid. 24. Transversalis colli. 25. Cervi- 

 calis ascendens. 26. The semi-spinalis colli. 27. The multifidus spinse. 28 

 A cervical vertebra. The transverse processes are seen to be traversed by the 

 vertebral artery and vein. 



