Chronic Ankle Instability

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Clinically Relevant Anatomy

Ankle sprain is a common athletic injury. Three-quarters of these injuries involve the lateral ligamentous complex[1] consisting of the anterior talofibular ligament (ATFL), the calcaneofibular ligament (CFL), and the posterior talofibular ligament (PTFL). Forced plantar flexion and inversion of the ankle while the body’s center of gravity rolls over the ankle are the most common way to injure these lateral ligaments. About 80% percent of acute ankle sprains make a full recovery with conservative management, while 10% to 30%[2] of acute ankle sprains develop mechanical or functional instability due to several reasons like a loss of mechanoreceptors[3], resulting in chronic ankle instability.[2,4,5]

Mechanism of Injury / Pathological Process

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