196 



THE SUPERIOR EXTREMITY 



from the medial side of the neck of the radius to the distal 

 border of the radial notch of the ulna. 



Ligamentum Collaterale Radiale (O.T. External Lateral 

 Ligament). The radial collateral ligament is a strong but 

 short band which is attached proximally to the distal aspect 

 of the lateral epicondyle of the humerus. Distally, it is 

 fixed to the annular ligament of the radius, and also, more 

 posteriorly, to the lateral side of the olecranon of the ulna. 

 The annular ligament is a strong ligamentous collar which 

 surrounds the head of the radius, and retains it in the radial 

 notch of the ulna. 



Humerus 

 Triceps muscle 

 Tendon of triceps 



Pad of fat 



Triceps bursa 



Posterior. 



ligament 



Olecranon bursa 



Trochlea of 



humerus 



Flexor digitorum 

 profundus 



'-,'- Brachialis 



Anterior ligament 



[_ Tendon of biceps 

 muscle 



13L Profunda vein 



Coronoid process of 

 ulna 



Deep fascia 

 f- Flexor carpi radialis 



HH Radial artery 

 rr^S Ulnar artery 

 fr^r Pronator teres 



PW Flexor digitorum 

 profundus 



FIG. 83. Sagittal section of the Right Elbow Region. 



Ligamentum Collaterale Ulnare (O.T. Internal Lateral 

 Ligament). The ulnar collateral ligament, taken as a whole, 

 is fan-shaped. By its proximal pointed part it is attached to 

 the medial epicondyle of the humerus. Distally it spreads 

 out and is inserted into the coronoid process and the 

 olecranon. It consists of three very distinct portions, viz., an 

 anterior, a posterior, and a transverse (Fig. 84). 



The anterior part springs from the distal and anterior part of 

 the medial epicondyle, and is attached to the medial margin 

 of the coronoid process of the ulna. The posterior part is 

 attached, proximally, to the distal and dorsal part of the medial 

 epicondyle, whilst distally, it is fixed to the medial border of 



