178 



Joints of the Upper Extremity. 



Processus coracoideus 



Ligament um coracohumerale 

 M. subscapularis 

 (cut off near its insertion) 



Ligamentum 

 transversuni scapulae superius 



M. biceps (Caput 



longum) (Tendon 



cut through) 



229. Right shoulder joint, articulatio humeri, 



from in front. 



(The bursa m. subscapularis is not shown. Of the shoulder blade only the lateral part has 



been drawn in.) 



The articulatio humeri (shoulder joint) (see also Figs. 228, 230 and 231) is formed 

 in that the caput humeri moves upon the cavitas glenoidalis scapulae. The articular surface 

 of the shoulder blade is enlarged by means of a connective tissue ring, labrum glenoidale 

 (0. T. glenoid ligament), which is attached to the margin of the cavitas glenoidalis. From 

 the outer side of this fibrocartilaginous projection a wide and loose capsula articularis extends 

 to the collum anatomicum humeri and bridges over the upper end of the sulcus intertuber- 

 cularis. The mm. subscapularis, supraspinatus, infraspinatus, running close by the joint, are 

 firmly attached to the capsule near their insertions to the humerus. The stratum fibrosum 

 of the capsule consists essentially of laterally directed fibre bands which form somewhat thicker 

 layers in front and below. 



