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Plantar Calcaneonavicular Ligament
Connective Tissue

Plantar Calcaneonavicular Ligament

Ligamentum calcaneonaviculare plantare

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Structure

The plantar calcaneonavicular ligament, or the spring ligament, is a strong, thick fibrocartilaginous band arising from the anterior border of the sustentaculum tali of the calcaneus. The ligament extends distally, crossing the head of the talus, to reach the plantar surface of the navicular bone.

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Anatomical Relations

The plantar calcaneonavicular ligament links the calcaneus and the navicular bones. Since it passes below the head of the talus, it acts as a hammock and forms part of the articular cavity for the head of the talus. The ligament is crossed by several tendons that support it, including the tibialis posterior, flexor hallucis longus, and flexor digitorum longus muscles. The fibers of the plantar calcaneonavicular ligament blends with that of the medial collateral ligament of the ankle joint.

Function

The plantar calcaneonavicular ligament maintains the medial longitudinal arch of the foot by transferring weight from the talus.

List of Clinical Correlates

—Pes planovalgus

—Flatfoot deformity

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