Registered Kinesiologist Practice Test

In an inversion injury to the ankle while the foot is in a plantar flexed position, the anterior talofibular ligament is the most commonly injured ligament. This is primarily due to the biomechanical mechanics of the ankle in this position. When the foot is plantar flexed, it stabilizes the ankle in a way that makes it more susceptible to lateral forces, which can cause the foot to roll inward, or invert.

The anterior talofibular ligament, located on the lateral side of the ankle, connects the talus bone to the fibula and plays a critical role in maintaining stability during inversion movements. Inversion injuries typically place significant stress on this ligament, leading to sprains or tears. Given that this scenario describes the foot being both plantar flexed and inverted, this ligament is particularly vulnerable.

In contrast, the other ligaments mentioned are less likely to be involved in this specific type of injury. The calcaneofibular ligament does assist with stability during ankle movements but is not predominantly involved when the ankle is in a plantar flexed position. The posterior talofibular ligament provides stability primarily in dorsiflexion scenarios and is less involved in inversion mechanisms. The deltoid ligament, located medially, primarily resists