There are four main ligaments in each knee.
The Four Major Knee Ligaments
These crucial ligaments connect your thighbone (femur) to your shinbone (tibia) and provide stability to your knee joint. They are:
- Anterior Cruciate Ligament (ACL): Located in the center of the knee, the ACL controls rotation and forward movement of the tibia. ACL injuries are very common, often occurring during sports.
- Posterior Cruciate Ligament (PCL): This ligament, also centrally located, prevents the tibia from moving backward excessively.
- Medial Collateral Ligament (MCL): This ligament is on the inner side of the knee and prevents excessive inward movement of the lower leg.
- Lateral Collateral Ligament (LCL): This ligament is on the outer side of the knee and prevents excessive outward movement of the lower leg.
Understanding Knee Ligament Injuries
Knee ligament injuries, such as tears, often result from trauma like car accidents or sports injuries. The ACL is particularly susceptible to injury. Diagnosis often involves a physical exam and may include imaging tests like an MRI.
Note: While these are the four main ligaments, other smaller ligaments also contribute to the knee's complex structure and function.
