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Tibionavicular Ligament
Connective Tissue

Tibionavicular Ligament

Ligamentum tibionaviculare

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Structure

The medial collateral ligament of the ankle joint is a strong fan-shaped ligament found on the medial aspect of the ankle. It is composed of four parts, including the tibionavicular, tibiocalcaneal, and anterior and posterior tibiotalar parts. All of the fibers arise from the apex and anterior and posterior borders of the medial malleolus.

The tibionavicular part forms the anterior-most superficial fibers the medial collateral ligament of the ankle joint fibers. The fibers of the tibionavicular part extend anteriorly to attach to the navicular tuberosity, as well as blending with fibers of the calcaneonavicular ligament.

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Anatomical Relations

The tendons of posterior tibialis and flexor digitorum longus muscles, along with the tibial nerve and posterior tibial artery, pass between the medial collateral ligament of the ankle joint and the flexor retinaculum of the foot.

Function

The medial collateral ligament of the ankle joint stabilizes the ankle joint during eversion of the foot and prevents subluxation of the ankle joint.

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