The ATFL is the weakest and most commonly sprained ligament in the body, running from the anterior lateral malleolus to the lateral talar neck, restraining anterior talar displacement during plantarflexion.
Resists anterior talar translation and provides primary lateral ankle stability when the foot is plantarflexed.
ATFL tears represent over 70% of all ankle sprains. Anterior drawer of the ankle tests integrity. Most respond to conservative management though chronic instability may need reconstruction.
Inversion with plantarflexion tear producing lateral ankle pain anterior to the malleolus, swelling, and a positive anterior drawer — the most common ligament injury in sport.
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