Which ligament is injured in an eversion ankle sprain?

• A. Deltoid Ligament
• B. Lateral Collateral Ligaments
• C. Achilles Tendon
• D. Posterior Tibiofibular Ligament

Answer: (A)

An eversion ankle sprain stretches the tissues on the inner (medial) side of the ankle, so the structure that bears the brunt is the deltoid ligament, a broad medial ligament complex that resists eversion and external rotation. This makes it the primary structure injured in this mechanism. The lateral ligaments on the outside are more commonly damaged in inversion sprains, where the foot rolls inward. The Achilles tendon is a tendon, not a ligament, and while it can be involved in certain ankle injuries, it’s not the ligament typically injured in an eversion sprain. The posterior tibiofibular ligaments stabilize the distal tibiofibular joint and are usually involved in high ankle sprains with external rotation and dorsiflexion, not a standard eversion sprain.