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The posterior talocalcaneal articulation is formed by a concave surface of the talus and a convex surface of the calcaneus. [3] The sustentaculum tali forms the floor of middle facet, and the anterior facet articulates with the head of the talus, and sits lateral and congruent to the middle facet. In some people the middle and anterior facets ...
The talus (/ ˈ t eɪ l ə s /; Latin for ankle [1] or ankle bone; [2] pl.: tali), talus bone, astragalus (/ ə ˈ s t r æ ɡ ə l ə s /), or ankle bone is one of the group of foot bones known as the tarsus. The tarsus forms the lower part of the ankle joint. It transmits the entire weight of the body from the lower legs to the foot. [3]
The interosseous talocalcaneal ligament forms the chief bond of union between the talus and calcaneus.. It is a portion of the united capsules of the talocalcaneonavicular and the talocalcaneal joints, and consists of two partially united layers of fibers, one belonging to the former and the other to the latter joint.
The talus bone or ankle bone is connected superiorly to the two bones of the lower leg, the tibia and fibula, to form the ankle joint or talocrural joint; inferiorly, at the subtalar joint, to the calcaneus or heel bone. Together, the talus and calcaneus form the hindfoot. [1]
The anterior talofibular ligament is a ligament in the ankle.It passes from the anterior margin of the fibular malleolus, passing anteromedially to insert at the lateral aspect of the talus at the talar neck , in front of its lateral articular facet.
Between these superior articulations and the equivalents on the talus is the tarsal sinus (a canal occupied by the interosseous talocalcaneal ligament). [citation needed] At the upper and forepart of the medial surface of the calcaneus, below the middle talar facet, there is a horizontal eminence, the talar shelf (also sustentaculum tali). [2]
Talus flatirons lie within the scarp slope – and pediment flatirons occur within the transition zone between scarp and foreland. Pediment flatirons can merge downward into a fluvial terrace. Both talus and pediment flatirons are the relict remnants of formerly active slope systems that were once part of the scarp's history. [7] [8]
It is responsible for transmitting the majority of the body's weight from the talus bone to the ground. [citation needed] Calcaneal fractures are categorized as intra-articular or extra-articular on the basis of subtalar joint involvement. Intra-articular fractures are more common and involve the posterior talar articular facet of the calcaneus.