The PCL is the strongest intracapsular knee ligament, connecting the posterior tibial plateau to the anterior medial femoral condyle, serving as the primary restraint against posterior tibial displacement.
| Origin | Lateral surface of the medial femoral condyle in the anterior intercondylar notch |
|---|---|
| Insertion | Posterior intercondylar area of the tibia, extending onto the posterior tibial surface just below the joint line |
Prevents the tibia sliding backward beneath the femur during knee flexion under load.
PCL injuries occur from direct posterior tibial force (dashboard injury) and present with a positive posterior drawer. Isolated tears often managed non-operatively.
Posterior tibial force or hyperflexion tear producing posterior knee pain and a positive posterior drawer sign, the tibia sags backward at 90° flexion.
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