Subtalar Joint Anatomy, Pronation, Supination and Neutral Position on Real Foot Skeleton The subtalar joint (STJ) is made up of two bones, the superiorly-located talus, and the inferiorly-located calcaneus. During range of motion of the STJ, the talus and calcaneus glide on one another on their three articular facets, the posterior, middle and anterior facets. During STJ supination, the posterior facet of the talus glides posteriorly and superiorly along the posterior facet of the calcaneus unti

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Basic anatomy of Subtalar Joint and Foot The subtalar joint (talocalcaneal joint) is vital for hindfoot stability and mobility. Posterior facet: largest, best seen on lateral radiographs and CT Middle facet: on the sustentaculum tali, may communicate with the talonavicular joint Anterior facet: smallest, may merge with the middle facet Imaging pearls: Sustentaculum tali appears brick-shaped on lateral X-ray Anterior calcaneal process should not articulate with the navicular—if it does, think coa

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