the leg. The ACL connects the lateral side of the femur to the medial side of the fibia, and the PCL does vice-versa, forming an X, with the ACL running along the top. Ligament tears often occur with a twist or blow to the outside of the knee joint. Twisting the knee while the foot is planted can also do the trick.
             The two most commonly injured ligaments are the MCL and the ACL, however these are the two strongest of the ligaments. Tearing these rope-like tissues generally require a violent force, regardless of age. While the ligament tears, it makes a popping or cracking noise, and can be heard by others. As this happens, the knee simply buckles and the person falls down, and can no longer bear weight. Swelling immediately sets in. The MCL is the only ligament that can heal on its own in most cases. If the ACL is left to heal on its own without surgery, the scar tissue would bond to the PCL, cau
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