Joints of the Upper Extremity. 



177 



Ligamentum coracoacromiale 



i 

 Ligamentum acromioclavicularc 



Acromion 



Ligaroentum trapezoideum 1 Ligamentum 



Lig. conoideum f coracoclaviculare 



Ligamentum trans versum 

 scapulae superius 



M. biceps (Caput 



longum) (Tendon 



cut through) 



Cavitas 

 glenoidalis 



Labrum glenoiclale -- 



Capsula articularis 



228. Right shoulder girdle with ligaments, 



from without and somewhat from in front. 



(The medial half of the clavicle has "been sawed off. The shoulder joint has been opened and the 

 head of the humerus removed. Of the shoulder blade only the lateral portion has been drawn.) 



The three ligaments of the shoulder blade extend between segments of bone which 

 are not moveable upon one another; they accordingly serve only as a supplement of the 

 bony structure. 



The ligamentum coracoacromiale (coracoacromial ligament) is strong, broad, oblong, 

 quadrangular and extends above the shoulder joint from the anterior surface of the acromion 

 to the posterior surface of the processus coracoideus. 



The ligamentum transversum scapulae superius (see also Figs. 229 and 231) is thin 

 and flat; it is stretched out over the incisura scapulae and transforms this into a foramen 

 through which pass the v. transversa scapulae and the n. suprascapularis (the a, transversa 

 scapulae generally runs over the same). 



The ligamentum transversum scapulae inferius (see Fig. 230) is thin and round ; it 

 extends from the root of the acromion to the posterior margin of the cavitas glenoidalis, over the 

 collum scapulae. Through the space between ligament and bone runs the a. transversa scapulae. 



In the articulatio acromioclavicularis the facies articularis acromialis claviculae is 

 united with the facies articularis acromii (rarely with intercalation of a disc of fibro-cartilage, 

 discus articularis). From the margins, of the joint surfaces stretches out a capsula articularis, 

 strengthened on the upper surface by the broad ligamentum acromioclaviculare. 



Between the tuberositas coracoidea claviculae and the upper surface of the processus 

 coracoideus scapulae extends the broad, powerful ligamentum coracoclaviculare; its anterior, 

 lateral, quadrangular part is called the ligamentum trapezoideum, its posterior medial, trian- 

 gular part, broader above, more apical below, the ligamentum conoideum; between the two 

 there is often a bursa, bursa ligamenti coracoclavicularis (see Fig. 345). 



Spalteholz, Atlas. 12 



