The ankle joint and its functions
The ankle joint is a complex structure that connects the foot and ankle to the lower leg, enabling a wide range of motion and weight-bearing functions. It comprises the tibia, fibula, and talus, and is supported by critical structures such as the anterior talofibular ligament, posterior talofibular ligament, and surrounding connective tissues (Manganaro & Alsayouri, 2020).
This joint plays a central role in mobility, absorbing shock from activities such as walking, running, and jumping. It also supports balance and posture while facilitating smooth and controlled movement of the lateral ankle and the entire lower limb (Brockett et al., 2016).
Given the ankle's mechanical load and range of motion, it's highly susceptible to ankle injuries, particularly acute ankle sprains. Lateral ankle sprains are among the most common, often involving injury to the anterior talofibular ligament—a key stabilizer on the outside of the ankle. Repeated sprains or inadequate rehabilitation can lead to chronic ankle instability, which may compromise long-term joint function.
Clinical evaluation of suspected lateral ankle injuries often includes physical tests like the anterior drawer test and the external rotation test, which assess ligament integrity and joint stability. These assessments are crucial in diagnosing ankle injuries and determining whether the patient is dealing with a mild sprain or more severe ligamentous damage.
Proper joint care—through strengthening exercises, bracing, and education on safe movement patterns—is essential in preventing reinjury and maintaining long-term functionality of the foot and ankle. As clinicians, recognizing the delicate interplay of structures within the ankle allows for more accurate diagnosis and effective treatment planning.










