Subtalar joint
joint of the foot
In human anatomy, the subtalar joint, also known as the
talocalcaneal joint, is a joint of the foot. It occurs at the meeting point of the talus and the calcaneus.
The joint is classed structurally as a synovial joint, and functionally as a plane joint.
Structure
The talus is oriented slightly obliquely on the anterior surface of the calcaneus.
There are three points of articulation between the two bones: two anteriorly and one posteriorly. The three articulations are known as facets, and they are the posterior, middle and anterior facets.
At the anterior and middle talocalcaneal articulation, convex areas of the talus fits on to concave surfaces of the calcaneus.
The posterior talocalcaneal articulation is formed by a concave surface of the talus and a convex surface of the calcaneus.
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. The posterior facet is the largest of the three, and separated from the others by the tarsal canal.
“Subtalar joint” enters the record as joint of the foot. Crown Archives preserves that source wording while asking what Subtalar, joint and foot can confirm, complicate or overturn.
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This entry incorporates text from “Subtalar joint” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.