The posterior medial elbow capsular ligament reinforces the posterior UCL bundle and restricts posteromedial elbow impingement. It becomes contracted in valgus extension overload syndrome producing limited elbow extension and osteophyte formation in the posteromedial olecranon.
Posterior medial elbow containment; limits excessive valgus in deep flexion; supplementary to the UCL posterior bundle.
The posterior medial capsular ligament is released in elbow extension contracture surgery and addressed during posteromedial impingement debridement. Contracture of this structure limits terminal elbow extension in throwing athletes and after elbow dislocation.
Posterior medial capsule fibrosis limiting elbow extension in throwing athletes from repetitive valgus loading, managed by arthroscopic posterior medial capsule release as part of posteromedial impingement surgery.
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