Elbow Ligaments

 

Elbow Lateral Collateral Ligament Elbow Lateral Collateral Ligament
  1. Annular Ligament
  2. Radial Tuberosity
  3. Ulnar band of lateral collateral ligament
  4. Lateral collateral and annular ligament insertion is a broad conjoined insertion onto the proximal aspect of the ulna which is 2.3 ± 0.4 centimeters long, begining at the proximal margin of the radial head. The insertion may be bilobed as shown, or a single broad expansion. (Cohen MS, JBJS 1997;79A:225)
  5. Lateral Epicondyle: origin of the lateral collateral ligament.

The primary restraint to posterolateral rotatory instability of the elbow is the combination of the lateral collateral and annular ligaments. The principal secondary restraints are the extensor muscles with their fascial bands and intermuscular septa. (Cohen MS, JBJS 1997;79A:225)

 
Elbow Medial Collateral Ligament Elbow Medial Collateral Ligament
  • consists of anterior and posterior bundles
  • Callaway GH, JBJS 1997;79A:1223
  1. Medial Supracondylar Ridge
  2. Medial Epicondyle
  3. Olcranon fossa of humerus
  4. Posterior bundle of MCL: Origin=medial epicondyle slightly posterior to its most inferior portion. Insertion=broadly onto the olecranon
  5. Olecranon
  6. Transverse oblique bundle (variable)
  7. Anterior bundle of MCL: origin=inferior aspect of the medial epicondyle. Insertion=sublime tubercle. Primary restraint to valgus stress at the elbow from 30° to 120°.
  8. Sublime Tubercle of Ulna
  9. Ulnar tuberosity
  10. Radial tuberosity
  11. Radial Head