LIGAMENTS OF THE FOREARM. 705 



muscles, which almost completely surround it, except a 

 small portion below and internally, where it is conse- 

 quently weaker, and where dislocations of this joint are 

 found most commonly to occur. 



The coraco-liumeral, accessory ligament, or ligamentum 

 adscititium extends beneath the triangular ligament down- 

 ward and outward to the greater tuberosity, where it is 

 lost in the capsular. This ligament serves to keep the 

 head of the humerus in the glenoid cavity. 



The glenoid ligament surrounds the margin, and deepens 

 the glenoid cavity ; its free edge is thin, but where it con- 

 nects with the bone it is thick. The tendon of the biceps 

 partly contributes to this ligament. 



The synovial membrane lines the capsular ligament and 

 glenoid surface, is reflected over the head of the humerus, 

 lines the bicipital groove, and forms a sheath around the 

 tendon of the biceps. 



LIGAMENTS OF THE FOREARM. 



The ligaments of the forearm are found in the humero- 

 cubital articulation, or the elbow joint, and are, 1st, The 

 capsular ligament ; 2d, External lateral or brachio-radial ; 

 3d, Internal lateral or brachio-ulnar ; 4th, Coronary liga- 

 ment ; 5th, Ligamentum teres. 



The capsular ligament surrounds the elbow joint, and is 

 connected above to the lower end of the humerus, above 

 the articular surface, and below to the articular margin of 

 the ulna and neck of the radius. 



The external lateral ligament extends from the external 

 condyle above to the annular ligament surrounding the 

 neck of the radius below. 



The internal lateral ligament extends from the internal 

 condyle, expands and divides as it descends, one portion 

 going to the coronoid process, the other to the olecranon. 



Between the lateral ligaments in front and behind the 

 joint, the capsular ligament is thin, its fibres insulated, 

 some taking an oblique, others a straight course, and re- 

 ceiving the name of accessory ligaments. 

 45 



