Which joint contributes to stability of the midtarsal joint along the lateral column?

Which joint contributes to stability of the midtarsal joint along the lateral column?

• A. Subtalar joint
• B. Tarsometatarsal joint
• C. Calcaneocuboid joint
• D. Talonavicular joint

Answer: (C)

Stability of the midtarsal joint along the lateral column is mainly provided by the calcaneocuboid joint. The midtarsal joint, also known as Chopart’s joint, consists of two key articulations: the medial talonavicular joint and the lateral calcaneocuboid joint. The calcaneocuboid connection acts as the primary lateral buttress, locking the calcaneus and cuboid together to maintain the height and rigidity of the lateral column during weightbearing and propulsion. This stability helps prevent excessive splay or abduction of the lateral forefoot and supports the lever mechanism of the foot in push-off. While the subtalar joint governs hindfoot inversion–eversion, and the talonavicular plus tarsometatarsal joints contribute to medial stability and forefoot alignment, the calcaneocuboid joint is the key structure stabilizing the lateral column of the midtarsal region.

Stability of the midtarsal joint along the lateral column is mainly provided by the calcaneocuboid joint. The midtarsal joint, also known as Chopart’s joint, consists of two key articulations: the medial talonavicular joint and the lateral calcaneocuboid joint. The calcaneocuboid connection acts as the primary lateral buttress, locking the calcaneus and cuboid together to maintain the height and rigidity of the lateral column during weightbearing and propulsion. This stability helps prevent excessive splay or abduction of the lateral forefoot and supports the lever mechanism of the foot in push-off. While the subtalar joint governs hindfoot inversion–eversion, and the talonavicular plus tarsometatarsal joints contribute to medial stability and forefoot alignment, the calcaneocuboid joint is the key structure stabilizing the lateral column of the midtarsal region.