Clover Learning Lower Extremities Practice Test

In inversion ankle sprains, the mechanism stresses the lateral ligaments most. The anterior talofibular ligament takes the brunt first because a sudden inward roll of the ankle with the foot often in plantarflexion places the ATFL under the greatest strain. The calcaneofibular ligament is also commonly affected as the sprain can progress with continued inversion. The deltoid ligament on the medial side isn’t typically involved in a pure inversion injury; it’s more likely with eversion or very severe sprains. The posterior talofibular ligament, which resists backward movement of the talus and is more engaged in dorsiflexion or more complex injuries, is least likely to be torn in a standard inversion sprain. So the ligament least commonly involved is the posterior SAMPLEtalofibular ligament.