Inversion ankle sprains


December 2017


Kinesiology undergraduate students


Michael Corrin and Dr. Judi Laprade


Adobe Illustrator


Powerpoint slide (16:9)


Lateral ligament tears in the ankle occur as a result of excessive force pushing the foot into inversion, where the sole of the foot is rotated medially towards the midline of the body. Depending on the degree of rotation, sprains in the lateral ligaments can range from being mild (stretched or partially torn) to severe (completely ruptured). There are three ligaments on the lateral side of the ankle with specific resistances to various foot positions. The anterior talofibular ligament (ATFL), calcaneofibular ligament (CFL) and posterior talofibular ligament (PTFL) resist inversion of the foot in the plantarflexion, neutral and dorsiflexion positions, respectively. Although inversion forces usually result in damage to a specific ligament depending on the foot position, other lateral ligaments in the ankle complex may also be torn as well.


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