THE LATERAL CERVICAL MUSCLES 



389 



Beloic, the fascia is attached to the acromion, the clavicle, and the manubrium 

 sterni. Some little distance above the last it splits into two layers, superficial 

 and deep. The former is attached to the anterior border of the manubrium, the 

 latter to its posterior border and to the interclavicular ligament. Between these 

 two layers is a slit-like interval, the suprasternal space (space of Burns) ; it contains 

 a small quantity of areolar tissue, the lower portions of the anterior jugular veins 

 and their transverse connecting branch, the sternal heads of the Sternocleido- 

 mastoidei, and sometimes a lymph gland. 



Omohyoideus 

 Thyroid gland 



Common carotid anery 

 Int. jugular vein \ 



Sternodc idomastoideus 



Vagus 



Ext. jugular vein 

 Scalenus anterior 

 Scalenus medius" 



Splenius cotti" 

 Levator scapula' 



Trapezius 



' Ant. jugular vein 



\ Sternohyoideus 



~ " Sternothyreoideufi 



Trachea 

 g Esophagus 



6th cervical vertebra 

 Vertebral vessels 



Semispinalis cotti 



- Semispinalis capitis 

 ] Splenius capitis 



FIG. 384. Section of the neck at about the level of the sixth cervical vertebra. Showing the arrangement of the 



fascia coli. 



The fascia which lines the deep surface of the Sternocleidomastoideus gives off 

 the following processes: (1) A process envelops the tendon at the Omohyoideus, 

 and binds it down to the sternum and first costal cartilage. (2) A strong sheath, 

 the carotid sheath, encloses the carotid artery, internal jugular vein, and vagus 

 nerve. (3) The prevertebral fascia extends medialward behind the carotid vessels, 

 where it assists in forming their sheath, and passes in front of the prevertebral 

 muscles. It forms the posterior limit of a fibrous compartment, which contains 

 the larynx and trachea, the thyroid gland, and the pharynx and esophagus. The 



