Comprehensive Osteopathic Medical Licensing Examination (COMLEX USA) Practice

The most common type of ankle sprain associated with inversion injuries is indeed the sprain of the anterior talofibular (ATF) ligament. This ligament is located on the lateral aspect of the ankle and plays a vital role in maintaining stability during activities that require ankle mobility, such as walking or running.

Inversion injuries typically occur when the foot turns inward excessively, placing strain on the ligaments that support the lateral side of the ankle. The ATF ligament, being the weakest and most commonly injured of the lateral ligaments, is particularly vulnerable during these movements. Damage to this ligament often results in swelling, pain, and instability around the ankle, which can significantly affect an individual's ability to walk or participate in physical activities.

Other ligaments mentioned—such as the deltoid ligament, calcaneofibular (CF) ligament, and posterior talofibular (PTF) ligament—are either less commonly involved in inversion injuries or located on the medial side of the ankle, which is not typically affected during an inversion mechanism. The deltoid ligament, for example, is more likely to be sprained in eversion injuries, highlighting the specificity of the ATF ligament's involvement in inversion-related sprains.