What are some facts about the anatomy of your ankle?


Quick Answer

The ankle is a hinge joint that comprises three bones: the tibia, the fibula and the talus. The simple but sturdy design of the ankle make it strong enough to support over one-and-a-half times a person’s body weight during daily activities or walking, and up to eight times a person’s body weight during intense exercise or running, according to eOrthopod.

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Full Answer

The main ankle bone is the talus. It fits into a socket created by the medial distal end of the fibula and the distal end of the tibia, states eOrthopod. The talus is on top of the calcaneus or heel bone. Articular cartilage, a thin lining in joints that cushions the bones and allows them to move smoothly, covers the bones in the ankle joint.

The Achilles tendon attaches the calf muscles above the ankle to the calcaneus and is important for any activity involving the leg and foot, explains eOrthopod. Other tendons are responsible for supporting the arch of the foot and turning it inward, raising the foot, and turning the foot downward and outward.

Ligaments, made of collagen, attach bones to bones and help to hold the bones in the ankle together. There are three ligaments on the lateral side of the ankle joint and one ligament on the medial side, explains eOrthopod. Other ligaments support the lower leg where the tibia and fibula connect, both dorsally and ventrally. The joint capsule comprises all the ligaments that surround the ankle joint and all the soft tissues that fill in the spaces between the ligaments.

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