What do ligaments do for the knee?

Answer 1

Keeps from luxating back and forth the distal femoral end from the tibial proximal end.

II.

As their name suggests, each ligament of the cruciate ligament pair crosses the other between its own attachment points, respectively, on laterally opposite aspects of the femur and of the tibia; and conversely for the "opposing" cruciate ligament in the cruciate ligament pair. So, then, you have two restraints (think of them like ropes . . . which, incidentally, is just the thing used to repair joints with severed tendons): one with origin on the medial (inside)aspect of distal femur which attaches to lateral aspect of proximal tibia and restricts forward flexing of tibia (this preventing backward flexion of knee joint; the other attached on opposite aspects, respectively, of femur and tibia and imparting similar leg anti-back-flexion restriction; and also combining, each with the other, to double the force which would be required (to double the tensile strength needing to be "overcome") in order to cause backward (unstable) flexion of the knee joint.

It is the "crossing" aspect of the ligament pair (over and above said doubling of tensile strength without doubling of ligament size and pathway) that contributes substantially to imparting knee joint stability: in that the two ligaments, functioning in tandem while also opposing each other at their limits of extension, also restricts transversely-directed torsion/twist between humerus and tibia, a motion which direct, femur-tibia ligament attachment on each side of the knee joint could not effectively do, if at all . . . because a ligament (or rope) cannot effectively impart or resist any force other than in the same direction as its stretched-out length; a femur-attached tendon cannot effectively influence a laterally imposed force applied at its distal attachment to the tibia, but stretching a ligament between those same limits of twist (and on both sides in opposition) can effectively accomplish that same action.

Answer 2

Well ligaments are pieces of connective tissue that connect bones to each other. the ligaments of the knee travel from the femur to the patella, then from the patella to the tibia. These ligaments are primarily there for connectivity, structure, and support.

Answer 3

Cruciate ligaments are the unique ligaments in your body. Best of the architects could not have imagined about such design. These ligaments are present inside the joint. They are very strong ligaments. They allow the full range of movement of this hinge joint. At the same time they prevent the forward and backward dislocation of the tibia over the femur bone. You need to see them from all the views and positions of the joint.

Answer 4

There are very beautiful two ligaments present inside the knee joint. Anterior and posterior cruciate ligaments cross each other. That is why they are called as cruciate ligaments. The anterior cruciate ligament goes from posterior part of femur to anterior part of tibia. The posterior cruciate ligament goes from anterior part of femur to posterior part of tibia. They prevent forward and backward dislocation of the tibia from femur.

Answer 5

The anterior cruciate ligament (ACL) and the posterior cruciate ligament (PCL).