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A MANUAL OF ANATOMY 



The external lateral ligament is a short, stout, flat band, which 

 is attached superiorly to the lower part of the external epicondyle 

 of the humerus, and inferiorly to the outer part of the orbicular 

 ligament of the radius. A few of its posterior fibres pass over the 

 orbicular ligament, and are attached to the outer margin of the 

 ulna. It is intimately related to the origins of the extensor carpi 

 radialis brevior and supinator radii brevis muscles. 



The internal lateral ligament is triangular, with the apex upwards. 

 It is attached superiorly to the anterior, inferior, and posterior 

 parts of the internal epicondyle of the humerus, and inferiorly to 

 the inner margin of the great sigmoid cavity of the ulna. It is 

 divisible into three portions — anterior, posterior, and middle. The 



Orbicular 

 Ligament 



Tendon of Biceps 



Oblique Ligament 



Superior Hiatus 



.. Internal Lateral 



Ligament 

 (Anterior portion) 



Internal Lateral Ligament 

 (Posterior portion) 



Internal Lateral Ligament 

 (Middle portion) 



Fig. 2i6. — The Right Elbow- Joint (Internal View). 



anterior portion is attached superiorly to the front and lower part 

 of the internal epicondyle, and inferiorly to the inner margin of the 

 coronoid process. The posterior portion is attached superiorly to 

 the lower and back part of the internal epicondyle, and inferiorly 

 to the inner margin of the olecranon process. The middle portion 

 consists of fibres which pass transversely from the olecranon to the 

 coronoid process, and blend with the fibrous band bridging over the 

 notch on the inner margin of the great sigmoid cavity between these 

 two processes. The ligament is intimately related to the origin of 

 the flexor sublimis digitorum. 



The synovial membrane lines the internal surface of the capsule, 

 and inferiorly is continued into the superior radio-ulnar joint, 

 where it lines the internal surface of the orbicular ligament and 



