Corpus: Ulnar collateral ligament
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Synonyms: ulnar collateral ligament, medial collateral ligament
'''English , UCL, MCL, MCL complex
Definition[Bearbeiten]
The ulnar collateral ligament, or UCL or MCL for short, is a collateral ligament of the elbow joint. It runs from the medial epicondyle of the humerus to the medial side of the trochlear incisura of the ulna.
Anatomy[Bearbeiten]
The ulnar collateral ligament is the most important ligament for stabilising the elbow joint and absorbs approx. 55% of the valgus stress in the elbow. It consists of three bundles of fibres:
- a pars anterior (anteromedial collateral ligament, AMCL),
- a pars posterior (posteromedial collateral ligament, PMCL) and
- a pars transversa (transverse bundle, Cooper ligament or Cooper strip)
The ligament serves as the origin for some fibres of the anconeus muscle.
On the opposite side of the elbow, the MCL has its counterpart in the lateral collateral ligament complex (LCL complex).
Function[Bearbeiten]
The ulnar collateral ligament or MCL complex stabilises the elbow joint against valgus stress. According to O'Driscoll's classification, it is one of the primary stabilisers of the elbow joint.
Clinic[Bearbeiten]
The ulnar collateral ligament is particularly strained during throwing sports.
Literature[Bearbeiten]
- Siebenlist, S., Biberthaler, P. Acute capsular ligament injuries of the elbow. Trauma Berufskrankh 17, 132-139 (2015). https://doi.org/10.1007/s10039-013-1987-9 [1] retrieved on 12/11/2020