It functions to hold the tibia and fibula tightly together and prevents excessive fibular displacement and external talar rotation. The posterior-inferior tibiofibular ligament originates at the posterior tibial tubercle (Volkmann fragment) and attaches to the posterior lateral malleolus.

What is the function of the tibiofibular joint?

The proximal tibiofibular joint (PTFJ) is a plane type synovial joint. The primary function of the PTFJ is dissipation of torsional stresses applied at the ankle and the lateral tibial bending moments besides a very significant tensile, rather than compressive weight bearing.

What does the inferior tibiofibular joint do?

Although heavily stabilized by the strong set of ligaments, the inferior tibiofibular joint allows discrete superior-inferior gliding of the bones and stretching of the interval between them. The purpose of these movements is to accommodate motion of the talocrural joint.