Sprained Ankle

Description

Oriented in lateral view, the talocrural joint is framed by the distal fibula forming the lateral malleolus, the trochlea of the talus seated beneath it, and the calcaneus posterior and inferior to the talus. Running from the anterior margin of the lateral malleolus to the talar neck, the anterior talofibular ligament (ATFL) is shown alongside the calcaneofibular ligament (CFL) descending to the lateral calcaneus, with the posterior talofibular ligament (PTFL) coursing posteromedially toward the talus. Distal to the hindfoot, the cuboid, lateral metatarsals, and proximal phalanges establish the lateral column alignment. Red accenting marks the typical sites of fiber strain or partial tear around the lateral ligament complex. Most ankle sprains follow inversion with the foot in plantarflexion, a mechanism that preferentially loads the ATFL before the CFL, so a lateral projection like this helps explain why tenderness clusters just anterior and inferior to the lateral malleolus and why bruising tracks along the peroneal tendons. Clinically, this anatomy maps directly to the anterior drawer test for ATFL laxity and the talar tilt test when CFL involvement is suspected, and it also clarifies why a high-grade lateral sprain can coexist with occult osteochondral injury of the talar dome. Swelling is expected. Instability is not. Use this artwork for orthopaedic or sports medicine teaching on talocrural biomechanics, for patient-facing explanations of lateral ankle sprain grades, or as a figure in emergency and primary care resources that pair exam findings with Ottawa Ankle Rule decision-making around lateral malleolar pain. Anatomical accuracy verified by SciePro's Medical Advisory Board.