428 



PRACTICAL ANA 'I'OMY. 



infraspinatus ; (5) subscapularis ; (6) teres minor ; (7) tares major ; (8) latissimus 

 clorsi ; (9) coraco-brachialis ; (10) pectoralis major ; (i i) deltoid. 



1. Xante the ostcological parts concerned in this articulation in any manner. 



(I ) The articular surface of the humeral head ; (2) the glenoid cavity of the 

 scapular head ; (3) the anatomical neck of the humerus ; (4) the anatomical neck 

 of the scapula ; (5) the greater tuberosity with its three facets ; (6) the lesser 

 tuberosity with one facet ; (7) the surgical neck of the humerus ; (8) the surgi- 

 cal neck of the scapula ; (9) the humeral bicipital groove and its lips ; (10) the 

 supraglenoid tubercle bicipital; (i i) the infraglenoid tubercle tricipital ; (12) 

 the scapular notch and foramen; (13) the suprascapular notch and foramen; 

 (14) the fourth scapular angle ; (15) the acromion process of scapula ; (16) the 

 coracoid process of the scapula. 



2. Gk'c t/te morphology of the coraco-humcral ligament. 



Trapezoid ligament 



Tendon of eubacapularis muscle 



Capsule of the acromio-clavicular 

 joint 



Coraco-acromial ligament 

 Coraco-humeral ligament 



Transverse humeral ligament 



Tendon of biceps 



FIG. 297. OUTER VIEW OK THE SHOULDER-JOINT, SHOWING THE CORACO-HUMERAI. AND 

 TRANSVERSE HUMERAL LIGAMENTS. 



It is the divorced tendon of the pectoralis minor muscle, which in primitive 

 man was inserted into the lesser tuberosity of the humerus. 



3. By what is the capsule of the shoulder-joint lined? 



By synovial membrane. This membrane is also reflected onto the long head 

 of the biceps muscle in its transit of the cavity. 



4. Where is the transverse humeral ligament, and what is its function f 



It stretches from greater to lesser tuberosity, converting the bicipital groove . 

 into a canal for the lodgment of the long tendon of origin of the biceps muscle. 

 The canal is lined by a vaginal synovial membrane. 



5. }\ licit is t/te glenoid ligament f 



A circumferential rim of cartilage whose function seems to be to deepen the 

 cavity for the head of the humerus. It is attached to the capsule, and also to the 

 margin of the glenoid cavity. It is also continuous with the long head of the 

 biceps muscle. 



