- 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.
GH Callaway et al.
JBJS. Vol 79-A. No 8. Aug 1997.
