Superior extensor retinaculum The extensor retinaculum refers to the set of ligaments inside the ankle that connect the tibia and fibula, which are the bones of the lower leg. The Achilles tendon and ...

These tendons extend over the fibula, or calf bone, and the peroneus longus tendons attached to the peroneal muscles in the calf. They run into a ligament in the ankle joint known as the cruciate ...