It is formed by the lower or distal extremity of the fibula, on the lateral side of the ankle.
The bony protuberances located on the outer and the inner side are referred to as lateral malleolus and medial malleolus respectively. Lateral malleolus is a protuberance that is formed by the lower or distal extremity of the fibula, on the lateral side of the ankle. The ankle joint is a complex joint formed by three bones. It consists of the tibia provides the major weight bearing surface where it joins the talus. The joint is saddle-shaped with the tibia contributing the medial malleolus and the fibula contributing the lateral malleolus. The lateral malleolus is located on the outer side of the ankle, formed by the lower end of the fibula. There are generally two forms of of fractures which affect the ankle: 1  Bimalleolar fracture: break of the ankle that involves the lateral malleolus and the medial malleolus. Known as the ankle joint, the talocrural joint is actually two basic articulations working in cohesive junction. Each are hinge joints, with one formed at the end of the tibia and one formed at the lateral malleolus of the fibula. The lateral joint is formed at the juncture of the lateral malleolus and the fibula with the talus. With 4 ligament supports, the entire joint process in encapsulated within one joint capsule. The ligaments support the ankle joints from the outside of this capsule. 2. either of the two rounded prominences on either side of the ankle joint; the lateral (or fibular, external, or outer) malleolus is at the lower end of the fibula and the medial (or tibial, internal, or inner) malleolus is at the lower end of the tibia. adj. adj malle´olar. The lateral malleolus is a bony prominence on the fibula, one of the long bones that makes up the lower leg. The fibula is the narrowest of the long bones, situated on the outside of the leg, with this prominence creating the distinctive bump on the outside of the ankle. It is frequently involved in ankle fractures. The malleolus is the bony part on each side of the ankle. Each leg is supported by two bones, the tibia on the inside (medial aspect) of the leg and the fibula on the outside (lateral aspect) of the leg.
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the lateral malleolus is formed by the what