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An injury to the anterior talofibular ligament (ATFL) is the most common type of lateral ankle sprain. The ATFL connects the talus (ankle bone) to the fibula. Anterior talofibular ligament sprain symptoms include pain or soreness, swelling, difficulty walking, bruising, and stiffness in the joint.
The posterior tibial tendon performs plantar flexion, inversion of the foot, and stabilization of the medial longitudinal arch. Injury to this tendon can elongate the hind- and midfoot ligaments, especially the spring (calcaneonavicular) ligament, resulting in a painful flat-footed deformity.