ARTICULATIONS OF THE CLAVICLE AXD SCAPULA. 



135 



extremity of the clavicle with the inner edge of the acromion. It is sup- 

 ported above by a thick and broad superior ligament, and below by an 

 inferior ligament which is not so strong. An interarticular fibro-cartilage is 

 frequently present, but is sometimes wanting. It is usually wedge-shaped, 

 attached by its base to the upper part of the joint, and only partially sepa- 

 rating the small oval articular surfaces. 



Fig. 124. 



Fig. 124. VIEW FROM BEFORE OF THE ARTICULATIONS OF THE SHOULDER BONES. ^ 



1, acromio-clavicular articulation ; 2, conoid, and 3, trapezoid part of the coraco- 

 clavicular ligament ; 4, is near the suprascapular or coracoid ligament ; 5, placed on 

 the coracoid process, points to the coraco-acromial or deltoid ligament ; 6, is placed on 

 the front of the capsular ligament of the shoulder -joint ; 7, the coraco-humeral ligament 

 or accessory part of the capsular ; above 6, an aperture in the capsular ligament at the 

 place where a part of the tendon of the subscapularis muscle pierces the capsular liga- 

 ment, and is sometimes connected with a synovial bursa ; 8, tendon of the glenoid head 

 of the biceps muscle issuing between the tuberosities ; 9, right half of the interclavicular 

 ligament ; 10, interarticular fibro-cartilage of the sterno-clavicular articulation, shown by 

 removing the anterior sterno-clavicular ligament and synovial membrane ; 11, the costo- 

 clavicular or rhomboid ligament ; 12 and 13, the cartilage and small part of the second 

 and third ribs attached by their anterior costo-sternal ligaments. (See also Fig. 120.) 



The coraco- clavicular ligament, which connects the clavicle with the 

 coracoid process of the scapula, is divisible into two parts, each known by 

 a particular name. The conoid ligament, which is the posterior cr internal 

 fasciculus, broad above, narrow below, is attached inferiorly to the inner 

 part of the root of the coracoid process, and superiorly to a tubercle on the 

 inferior surface of the clavicle below the convex margin of its outer curve : 

 its fibres are directed backwards and upwards. The trapezoid ligament t the 

 anterior or external fasciculus, slopes upwards, backwards, and outwards 

 from the inner border of the coracoid process to an oblique line extending 

 outwards from the tubercle to which the conoid ligament is attached, and is 

 inserted at right augles to the line of attachment of that ligament to the 



