Which ligament is primarily affected in an ankle sprain?

• A. Medial collateral ligament
• B. Anterior cruciate ligament
• C. Calcaneofibular ligament
• D. Talofibular ligament

Answer: (C)

In the context of ankle sprains, the ligament primarily affected is the talofibular ligament, particularly the anterior talofibular ligament (ATFL). This ligament is located on the lateral side of the ankle and plays a critical role in stabilizing the joint during movements such as inversion, which is the most common mechanism leading to ankle sprains.

When an ankle is twisted or turned beyond its normal range of motion, particularly during activities that require sudden changes of direction, this ligament can become overstretched or torn, resulting in the sprain. The calcaneofibular ligament, also on the lateral side, can be involved as well, but the anterior talofibular ligament is most commonly injured.

Understanding this helps in diagnosis and treatment, as rehabilitation often focuses on strengthening the structures around the ankle after damage to the talofibular ligament. Knowledge of anatomy and the mechanics of the ankle is crucial for athletic trainers in identifying and managing ankle injuries effectively.