Ligaments connect the bones of the upper and lower leg and are made of strong groups of fibres that help to provide stability to your knee. There are two main groups of knee ligaments. They allow the joint to move, but they also prevent the joint from moving excessively or abnormally.
- The medial and lateral collateral ligaments [MCL and LCL] lie on the inner and outer sides of the knee respectively. They help to prevent sideways motion.
- The anterior cruciate ligament [ACL] and posterior cruciate ligament [PCL] lie in the centre of the knee crossing each other (hence “cruciate”). The ACL helps to limit rotation and forward motion of the tibia whilst the PCL located just behind the ACL limits the backward motion of the tibia.
- In addition, there is a complex area called the posterolateral corner (PLC), which is made up of a group of linked ligaments, tendons and capsular fibres that assist in rotational (twisting) stability.