SHOULDER, ARM, FOREARM, AND HAND. 187 



Name the muscles attaclicd to tlie middle lip of the axillary border of the 

 scapula. 



The triceps, teres minor, and teres major. The rule governing the relation 

 of anatomical minors to majors is : minors occupy a high, majors a low, level. 



Name the bony points of t/ie scapula traversed by a fracture of the so-called 

 surgical neck of the scapula, and the important structures endangered by sucli a 

 fracture. 



The suprascapular notch, in which is the suprascapular nerve, and above 

 which are the suprascapular vessels ; the scapular notch, in which are found the 

 vessels and nerves for the infraspinatus muscle ; the scapular angle, in which are 

 the vessels and nerves for the subscapularis muscle. 



Hoiv is the anterior lip of the vertebral border of the scapula occupied ? 



By the subscapularis and serratus magnus muscles. The latter muscle de- 

 presses the shoulder-girdle, being antagonistic to the trapezius and levator anguli 

 scapulae muscles. 



Name the muscles inserted into t/ie middle lip of the vertebral border of the 

 scapula. 



The levator anguli scapulae, rhomboideus minor, rhomboideus major. Notice 

 here the high origin of the minor, and note the rule previously mentioned 

 governing the relation of anatomical majors and minors. 



How are the three lips of the spine of the scapula occupied ? 



The superior by the insertion of a part of the trapezius ; the inferior by origin 

 of part of the deltoid ; the middle is subcutaneous, and is also called the crest. 



The Clavicle. 



Name parts of this bone of importance in practical anatomy. 



The sternal end, articulating with the manubrium. 



The acromial end, articulating with the acromion. 



The anterior surface of the inner two-thirds of the bone. 



The superior surface of the outer one-third of the bone. 



The inferior surface of the bone. 



What is the importance of the superior surface of the outer one-third of the 

 clavicle ? 



The attachment of the trapezius muscle posteriorly, and the deltoid anteriorly. 



What is the importance of the anterior surface of the inner two-thirds of the 

 clavicle f 



The origin of the pectoralis major and the sterno-cleido-mastoid muscles. 



What can you say of the posterior surface of the clavicle ? 



It forms an arch over the brachial plexus and subclavian artery and vein. 



Tell what you expect to find on the inferior surface of the clavicle. 



The subclavius muscle, in a groove in the middle one-third ; the origins of 

 the sterno-hyoid and sterno-thyroid muscles, and the impress for the rhomboid 

 or costo-clavicular ligament ; the oblique line for the trapezoid ligament and a 

 small tuberosity for the conoid ligament. 



1. Intermuscular groove between the pectoralis major and deltoid. 



2. The pectoralis major muscle and pectoral fascia. 



3. Suprasternal and supraclavicular nerves. 



4. The cephalic vein and descending branch of acromio-thoracic artery. 



5. The pectoral and deltoid origins on the clavicle. 



6. The perforating branches of the internal mammary artery. 



7. The axillary space geometrically. 



