38 HEAD AND NECK 



trapezius ; below by the upper border of the middle third 

 of the clavicle ; and above by the superior nuchal line of the 

 occipital bone, or by the meeting of the upper ends of the sterno- 

 mastoid and the trapezius. The roof is formed by the deep 



M. semispinalis capit 

 Posterior auricular vei 



frcm posterior facial vein 

 Int. jugular vein 

 Hypoglossal nerve 

 Posterior facial vein 

 Lesser occipital N. 

 Hypoglossal nerve 

 Great auricular N. 



M. digastrics 



Nerve to thyreo-hyoi< 

 Descendens hypoglos 

 M. thyreohyoideus 



M. splenius capitis 



Nervus cutaneus colli 



Accessory N. 



Superior thyreoid arter 

 M. omohyoideus 



Dorsalis scapulae nerve 

 External jugular vein 



M. scalenus medius 

 Trans, cervical artery 



Transverse 

 scapular artery 

 M. scalenus anteri 

 Subclavian artery 



M. omohyoideus 

 Brachial plexus 



FIG. 12. The Triangles of the Neck seen from the side. The clavicular head 

 of the sterno-mastoid muscle was small, and therefore a considerable part 

 of the scalenus anterior muscle is seen. 



cervical fascia, which is covered by superficial fascia and skin, 

 and in its lower and anterior part by the platysma, which is 

 embedded in the superficial fascia. It is pierced by (i) the 

 external jugular vein, at the lower and anterior angle ; (2) the 

 supraclavicular nerves, a short distance above the clavicle ; 

 (3) small cutaneous branches of the transverse scapular, trans- 



