The Neck. 477 



and with the highest part of its convexity about half an 

 inch above the clavicle. The suprascapular and transverse 

 cervical arteries run parallel with the clavicle, the former 

 behind this bone and the latter just above it. 



Veins. The internal jugular corresponds fairly well 

 with the line for the carotid arteries, although that 

 for the right vein is a little external to the line for the 

 right carotid, whereas, that for the left somewhat overlies 

 the line for the left carotid. External jugular. A line 

 drawn from the angle of the jaw to the middle of the cla- 

 vicle. (This vessel pierces the deep fascia at a point a 

 little over an inch above the clavicle.) Posterior jugular. 

 The line for this starts about one inch below and behind 

 the mastoid process and ends in the line for the external 

 jugular on a level with the lower border of the thyroid 

 cartilage. The line for the anterior jugular begins at the 

 hyoid bone and runs down the front of the neck to a point 

 half an inch above the sterno-clavicular articulation, 

 thence externally, about the same distance above the 

 clavicle, to end in the line for the external jugular vein. 



Nerves. The occipitalis minor; a line drawn from 

 the posterior border of the sterno-mastoid, opposite the 

 hyoid bone, to the posterior border of the mastoid process. 

 Auricularis magnus. A line drawn from the middle of 

 the posterior border of the sterno-mastoid to the lobule of 

 the ear. Transverse cervical, from the same point as the 

 above, across the neck, to the upper border of the thyroid 

 cartilage. For the descending branches of the cervical 

 plexus, draw a line from a point on the posterior border of 

 the sterno-mastoid, about half an inch below its middle, 

 to the sterno-clavicular articulation, for the sternal 

 branch ; to the middle of the clavicle, for the clavicular, 

 and, to the tip of the acromion, for the acromial branch. 

 Pneumo gastric. A line corresponding to that for the 



