The ankle joint consists of the tibiofibular, talocrural and subtalar joints. The tibiofibular joint is connected by the anterior tibiofibular, posterior tibiofibular, inferior transverse ligament and interosseous membrane. The talocrural joint located between the talus, the medial malleolus of the distal tibia, and the lateral malleolus of the distal fibula. The subtalar joint is an articulation between the talus and calcaneus. The medial ligament complex consisting of the tibionavicular, tibiocalcanean, posterior tibiotalar and anterior tibiotalar ligaments is very strong. The lateral side has several separated ligaments, including the anterior talofibular, calcaneofibular, posterior talofibular ligament. The key muscles surrounding the ankle are peroneal muscles (longus and brevis), triceps surae, and anterior / posterior tibialis.