Anatomy of knee joint

                      ANATOMY OF A KNEE JOINT

The knee joint is made up of three bones and a variety of ligaments. The knee is formed by the femur (the thigh bone), the tibia (the shin bone), and the patella (the kneecap). Several muscles and ligaments control the motion of the knee and protect it from damage at the same time. Two ligaments on either side of the knee, called the medial and lateral collateral ligaments, stabilize the knee from side-to-side.

Knee Injury – Arthroscopy

The Anterior cruciate ligament (ACL) is one of a pair of ligaments in the center of the knee joint that form a cross, and this is where the name “cruciate” comes from. There is both an anterior cruciate ligament (ACL=front elastic) and a Posterior cruciate ligament (PCL=back elastic). Both of these ligaments function to stabilize the knee from front-to-back during normal and athletic activities. The ligaments of the knee make sure that the weight that is transmitted through the knee joint is centered within the joint minimizing the amount of wear and tear on the cartilage inside the knee. There are two side ligaments also, Medial collateral (MCL) and lateral collateral ligament (LCL).These two ligaments along with muscles contribute also to joint stability.


The weight-bearing surfaces of your knees are covered with a layer of cartilage (doctors know it as “articular cartilage”). There are also two shock absorbers in your knee on either side of the joint between the cartilage surfaces of the femur and the tibia. These two structures are called the medial meniscus surfaces of the femur and the tibia. These two structures are called the medial meniscus and the lateral meniscus.
The menisci are horseshoe-shaped shock absorbers that help to both center the knee joint during activity and to minimize the amount of stress on the articular cartilage. The combination of the menisci and the surface cartilage in your knee produces a nearly frictionless gliding surface. The knee is an incredible joint. It is strong, flexible, and very tough. We start usuing it from the first day of our life till the last day but ligaments never become loose, unless until they are injured

Movement of the knee

The main muscles that move the knee joint are the quadriceps and hamstring muscles. The quadriceps attaches to the patella (knee cap), and the patellar tendon connects this muscle to the front of the tibia (leg bone). When the quadriceps muscles contract the knee extends ( straightens). In contrast, when the hamstring muscles contract, they pull the knee into flexion ( bedning).


ACL Knee Injury                                                                                    ACL-Knee-Injury-300x276 ACL-Knee-Injury-21-300x261




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