The posteromedial bundle of the PCL is the smaller bundle, taut in extension. Runs from the posteromedial femoral attachment to the posteromedial tibial insertion.
| Origin | Posterior part of the PCL footprint on the lateral surface of the medial femoral condyle |
|---|---|
| Insertion | Medial and distal part of the PCL facet in the posterior intercondylar area of the tibia |
Restrains posterior tibial translation near extension (0-30 degrees) and contributes to rotational stability in extension.
PMB tears occur in combined ligament injuries. Double-bundle PCL reconstruction targeting both ALB and PMB provides more comprehensive stability.
Posteromedial bundle disruption in multi-ligament knee injury requiring double-bundle reconstruction for full stability restoration.
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