Anterior Oblique Bundle of the MCL



- Discussion:
     - strong and well-defined, arise from antero-inferior surface of medial epicondyle and inserts at the sublimis tubercle, adjacent to the joint 
            surface;
     - primary constraint to valgus instability;
            - in flexion, MCL provides 54% of valgus stability;
            - radial head is most important secondary stabilizer to valgus stress;
     - sub-portions of the anterior oblique bundle:
            - anterior band:
                   - primary restraint to valgus rotation at 30, 60, and 90 deg of flexion and is a co-primary restraint at 120 deg;
                   - this band is more likely to be injured with the elbow in extension;
            - posterior band:
                   - co-primary restraint at 120 deg;
                   - this band is more likely to be injured in flexion (but injury to this band usually occurs along with injury to the anterior band);

- Exam:
    - anterior bundle of the MCL is tested with the elbow in 90 deg of flexion



Biomechanical evaluation of the medial collateral ligament of the elbow.



Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Tuesday, May 29, 2012 4:46 pm