What is the posterior bundle?

The posterior bundle is a fan-shaped area of capsular thickening that extends from the medial epicondyle to the semilunar notch of the ulna. It is a secondary stabilizer of the elbow when the joint is flexed beyond ninety degrees.

What does thickening of the UCL mean?

The presence of UCL thickening is likely related to joint forces experienced during pitching. During arm acceleration, the medial elbow is exposed to an external valgus torque as the elbow rapidly extends. The valgus load has been estimated to stress the UCL near its maximum tensile capacity.

How long does it take to recover from a thumb ligament surgery?

With traditional surgery, the ligament is sutured, and the thumb is immobilized in a cast for four to six weeks. “Athletes particularly dislike being in casts, and on top of that they can’t return to play for sometimes up to 10-12 weeks,” Shin notes.

What attaches to the sublime tubercle?

The anterior bundle of the ulnar collateral ligament is the primary stabilizer to valgus elbow stress. It originates from the anteroinferior medial epicondyle of the humerus and inserts on the sublime tubercle.

Can a partial UCL tear heal?

The UCL is rarely stressed in daily activities. It is injured in throwing types of sports or after elbow dislocation or surgery. It may occur as a sudden tear or may gradually stretch out over time with repetitive injury. When torn, the UCL does not typically heal or may heal in a lengthened position.

Does the UCL heal on its own?

Minor ulnar collateral ligament (UCL) injury can heal itself with nonsurgical treatments. However, if you want to perform any strenuous overhead or throwing activity or if the ligament has an advanced grade tear, then your doctor may recommend surgical repair for the torn UCL.

Is thumb ligament surgery painful?

You will likely have one 2-3 cm surgical incision on the inside of your thumb near your webspace. Ligament repairs can be painful. You will receive a prescription for narcotic pain medicine. For the first 2-3 days, take the pain medication around the clock to stay on top of the pain control.

What happens after thumb ligament surgery?

After surgery, you should expect some pain, swelling, and stiffness. Dr. Holt will talk to you about when it is safe to return to work. Most patients can return to light work (computer/desk work) within a few days, but it will often take 12 weeks to return to more demanding work (labor, construction, etc.).

What is the sublime tubercle?

sublime tubercle. the sublime tubercle on the ulna is where the anterior bundle of the medial ulnar collateral ligament attaches distally.

Where does the UCL attach?

The ulnar collateral ligament complex is located on the inside of the elbow (pinky or medial side). It is attached on one side to the humerus (the bone of the upper arm) and on the other side to the ulna (a bone in the forearm).

What is the difference between the RCL and LUCL?

When visible, the RCL is typically a thinner structure than the LUCL. Images posterior to the origins of the LUCL typically demonstrate increased signal (asterisks) resulting from volume averaging of the posterior capsule and the anconeus muscle and tendon and should not be confused with a proximal LUCL tear.

Where do the LUCL fibers insert?

The LUCL fibers insert distally on the supinator crest posterior to and commonly indistinguishable from the annular ligament fibers. A distal, more distinct band is frequently seen inserting at the tubercle of the supinator crest (12a).

What is the anatomy and function of the LUCL?

Anatomy and Function. Macroscopically, the LUCL is most distinct at its insertion with a frequently well-defined, strong anterior band inserting at the tubercle of the supinator crest. A thinner fan-like insertion extends proximally along the supinator crest, adjacent to the base of the annular ligament.

Is the LUCL posterolateral to the radial head?

As the LUCL passes posterolateral to the radial head, it overlies and partially blends with the subjacent annular ligament and is typically indistinguishable (11a). The insertion of the LUCL along the supinator crest can be demonstrated on coronal, coronal oblique (8a) and axial images (11a).