ARTICULATIO HUMERI 



93 



surrounds the margin of the glenoid cavity of the scapula, 

 and is attached to its rim. It deepens, and at the same 

 time serves to extend, the articular socket of the scapula. 

 The intimate connection which it presents with the capsule 

 of the joint can now be studied. Two tendons are also 

 closely associated with it, viz. the long head of the triceps 

 brachii below, and the long head of the biceps brachii above. 



Conoid ligament 



Trapezoid ligament 



Coraco-acromial 



ligament 



Coracoid process 



Superior gleno- _ 

 humeral ligament 



Bursal opening- 

 in capsule 



Inferior gleno- 

 humeral ligament 



Glenoid cavity 



Acromio- 

 clavicular 

 igament 



Capsule of 

 shoulder- 

 joint 



Glenoid 

 ligament 



FIG. 40. Capsular Ligament cut across and Humerus removed. 



Long Head of the Biceps. The long tendon which 

 receives this name is an important factor in the construc- 

 tion of the shoulder -joint. Entering the capsule through 

 the opening between the two tubercles of the humerus, 

 it is prolonged over the head of the bone to the top of the 

 glenoid cavity. Its origin should now be examined. It 

 divides into three portions, viz. a large intermediate part, which 

 obtains direct attachment to the scapula, and two smaller 

 lateral parts, which diverge from each other and blend with 

 the labrum glenoidale. The long head of the biceps brachii, 



