answersLogoWhite

0

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.

User Avatar

Wiki User

14y ago

What else can I help you with?

Related Questions

Is a knee ligament tear a internal or external injury?

Internal or external to what? The knee joint? There are a number of knee ligaments e.g. anterior and posterior cruciate ligaments are internal to the knee joint but the medial and lateral collateral ligaments are external to the knee joint


What do Donjoy knee braces do?

Donjoy knee braces protect knee ligaments from injury. This is an ideal product for athletes that do not want to injure or re-injure their knee ligaments.


What are the 3 C's of knee injury?

The 3 C's of common knee injuries are, collateral ligaments, cruciate ligaments, and cartilages.


What does Cruciate ligaments in knee do?

cruciate ligaments (cruciatum), allowing a very large range of motion (extension and flexion) of knee


What help stabilize the knee?

The Ligaments


What is the name of the tendon on the side of the knee?

The bone in your knee, or knee cap is also called a patella. This bone sits in ligaments between the femur and the tibia.


How do liaments help the knee?

The knee consists of four main ligaments. Ligaments help the knee by providing support and stability when it is moved in various positions such as when bending and stretching the leg.


How can damaging the ligaments in a knee affect the knee joint?

It can make the joint unstable.


You landed on your feet and hurt your knee What is wrong?

I know when I did that, I twisted the ligaments in my knee.


What ligament of the knee is intracapsular?

cruciate ligaments


What are the functions of ligaments and how they are related to the skeletal system?

Theyattach one bone to another bone. For example, at the knee, two ligaments surround the knee holding it steady.


What provides the main source of stability in the knee?

The Ligaments