Planter Calcaneonavicular Ligament Facet Of The Talus, Medial View

Description

Talus anatomy is centered on the inferomedial aspect of the talar head, where the facet for the plantar calcaneonavicular (spring) ligament appears as a smooth, curved articular-like surface. From this medial viewpoint, the talar head sits anterior to the neck and body, with the facet positioned inferior and slightly medial to the principal talonavicular articular surface. The contour of the head blends proximally into the neck, while the posterior body and trochlea remain secondary in the frame. Edges read sharply. The spring ligament spans from the sustentaculum tali of the calcaneus to the plantar surface of the navicular, and its fibrocartilaginous superior surface directly supports the talar head at this facet, forming the floor of the talocalcaneonavicular joint complex. Attenuation or rupture here is a recognized component of adult acquired flatfoot deformity (progressive collapsing foot deformity), often accompanying posterior tibial tendon dysfunction and leading to medial arch collapse with talar head plantar-medial subluxation. A medial perspective isolates the exact contact area that bears load and clarifies why pain localizes along the medial midfoot rather than the ankle mortise. Use this illustration in foot and ankle anatomy teaching, biomechanics lectures on medial longitudinal arch support, or surgical education covering spring ligament reconstruction, subtalar fusion planning, and talonavicular stabilization. It also fits radiology and orthopedics publications discussing MRI or ultrasound correlation of the spring ligament and adjacent talar head cartilage. Anatomical accuracy verified by SciePro's Medical Advisory Board.