THE SCAPULA 



207 



Coracoid 

 process 



Acromion 



Infraglenoid tubercle 



fibers of the Latissimus dorsi. The lateral angle is the thickest part of the bone, 

 and is sometimes called the head of the scapula. On it is a shallow pyriform, 

 articular surface, the glenoid cavity, which is directed lateralward and 'forward 

 and articulates with the head of the humerus; it is broader below than above 

 and its vertical diameter is the longest. The surface is covered with cartilage 

 in the fresh state; and its margins, slightly raised, give attachment to a fibro- 

 cartilaginous structure, the glenoidal labrum, which deepens the cavity. At its 

 apex is a slight elevation, the 

 supraglenoid tuberosity, to which 

 the long head of the Biceps 

 brachii is attached. The neck 

 of the scapula is the slightly 

 constricted portion which sur- 

 rounds the head; it is more dis- 

 tinct below and behind than 

 above and in front. 



The Coracoid Process (processus 

 coracoideus) . The coracoid pro- 

 cess is a thick curved process at- 

 tached by a broad base to the 

 upper part of the neck of the 

 scapula; it runs at first upward 

 and meclialward; then, becoming 

 smaller, it changes its direction, 

 and projects forward and lateral- 

 ward. The ascending portion, 

 flattened from before backward, 

 presents in front a smooth con- 

 cave surface, across which the 

 S ubscapularis passes. The hori- 

 zontal portion is flattened from 

 above downward; its upper sur- 

 f i ce is convex and irregular, and 

 g ves attachment to the Pector- 

 a is minor; its under surface is 

 smooth; its medial and lateral 

 borders are rough; the former 

 g ves attachment to the Pectoralis 

 n inor and the latter to the cora- 

 coacromial ligament; the apex is 

 embraced by the conjoined tendon 

 o ' origin of the Coracobrachialis 

 aid short head of the Biceps 

 brachii and gives attachment to 

 the coracoclavicular fascia. On 

 the medial part of the root of the 

 coracoid process is a rough im- 

 pression for the attachment of 

 the conoid ligament; and running from it obliquely forward and lateralward, 

 on to the upper surface of the horizontal portion, is an elevated ridge for the 

 attachment of the trapezoid ligament. 



Structure. The head, processes, and the thickened parts of the bone, contain cancellous 

 tissue; the rest consists of a thin layer of compact tissue. The central part of the supraspinatous 



Axillary border 



-Inferior angle 

 FIG. 205. Left scapula. Lateral view. 



