

Foundations⎪Shoulder & Elbow⎪Medial Ulnar Collateral Ligament Injury
Jul 29, 2025
Dive into the fascinating world of medial ulnar collateral ligament injuries, especially in overhead athletes. Learn about the intricate anatomy and injury mechanisms, alongside crucial diagnostic methods. Discover how biomechanics play a pivotal role during the throwing motion, emphasizing critical phases like late cocking and early acceleration. Treatment strategies ranging from conservative care to surgery are discussed, shedding light on the importance of understanding the UCL for effective management.
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UCL Injury Mechanism Insight
- The medial ulnar collateral ligament (UCL) injury leads to valgus instability mostly in overhead throwing athletes.
- Overuse and repetitive valgus stress cause microtrauma, typically affecting the anterior band of the UCL.
Rest and Strengthening as First Steps
- Initial treatment for adolescent UCL injuries includes activity avoidance and rest for six weeks.
- Begin flexor pronator strengthening as inflammation resolves before starting a controlled throwing program.
Primary Valgus Stabilizer
- The anterior band of the anterior bundle of the UCL is the primary static stabilizer against valgus stress.
- The flexor pronator mass provides dynamic stabilization, but does not contribute to static valgus stability.