The calcaneofibular ligament is a crucial stabilizing structure of the lateral ankle complex, connecting the fibula to the calcaneus and providing resistance against excessive inversion of the foot. Injury to this ligament is common in ankle sprains, often occurring alongside damage to the anterior talofibular ligament, and can lead to chronic ankle instability if not properly managed.

Calcaneofibular Ligament

The lateral ankle complex is a critical structure in the human body that provides stability and mobility to the ankle joint, primarily through the interaction of the fibula, talus, and calcaneus bones, along with associated ligaments. It plays a pivotal role in preventing excessive inversion and supporting the ankle during dynamic activities, making it essential for both everyday movements and athletic performance.

Lateral Ankle Complex

The fibula is the slender, lateral bone of the lower leg that primarily provides muscle attachment and stability to the ankle joint, rather than bearing significant weight. It plays a crucial role in forming the lateral malleolus, which is essential for ankle stability and movement.

Fibula

The calcaneus, also known as the heel bone, is the largest tarsal bone in the foot and plays a crucial role in supporting body weight and facilitating movement. It serves as the foundation for the rear part of the foot and is essential in the biomechanics of walking, running, and jumping.

Calcaneus

Excessive inversion of the foot

Ankle sprains occur when the ligaments that support the ankle stretch beyond their limits and tear, often resulting from sudden twists, rolls, or turns of the foot. Proper diagnosis and treatment are crucial to prevent chronic instability and ensure a full recovery.

Ankle Sprains

The Anterior Talofibular Ligament (ATFL) is the most commonly injured ligament in ankle sprains, especially during inversion injuries. It connects the fibula to the talus and plays a crucial role in stabilizing the ankle joint, particularly during plantarflexion and internal rotation of the foot.

Anterior Talofibular Ligament

Chronic ankle instability is a condition characterized by a recurring sensation of the ankle giving way, often following an initial ankle sprain. It results from a combination of mechanical instability due to ligamentous damage and functional instability caused by neuromuscular deficits.

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