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Lateral Collateral Ligament of Ankle (Left)
Connective Tissue

Lateral Collateral Ligament of Ankle (Left)

Ligamentum collaterale laterale articulationis talocruralis

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Structure

The lateral collateral ligament of the ankle joint is a complex of strong ligaments found on the lateral aspect of the ankle. It is composed of three distinct parts, including the calcaneofibular and the anterior and posterior talofibular ligaments.

—The anterior talofibular ligament arises from the anterior margin of the lateral malleolus and extends anteromedially to the lateral malleolar facet and the lateral aspect of the neck of the talus bone.

—The fibers of the posterior talofibular ligament run horizontally from the malleolar fossa of the fibula to the lateral tubercle of the talus.

—The calcaneofibular ligament arises just anterior to the apex of the lateral malleolus and extends to the lateral surface of calcaneus.

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Anatomical Relations

The tendons of the fibularis longus and brevis muscles pass over the lateral collateral ligament of the ankle joint.

Function

The lateral collateral ligament of the ankle joint stabilizes the ankle joint by resisting inversion of the foot.

List of Clinical Correlates

—Inversion sprains

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Collateral Ligament

ScienceDirect image

Note that the collateral ligaments of the PIP joints (and DIP joints as well, although not seen here) do not arise from the lateral notches of the heads of the phalanges as they do in their counterparts (the lateral notches of the metacarpal heads) at the MCP joints.

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