Ligaments of the knee: ACL and PCL

1. Where does the ACL attach?
2. What is the function of the ACL?
3. If the ACL is deficient, where is extra pressure placed?
4. Where does the PCL attach?
5. What is the function of the PCL?
6. If the PCL is deficient, where is extra pressure placed?

Answers:
1. The ACL attaches to the lateral intercondylar notch (of the femur) and to a point lateral to the medial tibial eminence.
2. Prevents anterior tibial subluxation, prevents backward sliding of femur and hyperextension of knee. In flexion, it draws the femoral condyles anteriorly.
3. Posterior menisci.
4. The PCL attaches to the medial intercondylar notch and to a point lateral to the posterior tibial plateau.
5. Restrain posterior tibial subluxation.
6. Patellofemoral joint.