Which structure is involved in the articulation of the ankle?

The articulation of the ankle primarily involves the tibia and fibula, which are the two long bones of the lower leg. The ankle joint is formed where these two bones meet at the talus, which is one of the tarsal bones of the foot. The tibia provides the main weight-bearing surface at the ankle, while the fibula offers stability and support. Together, they create a stable joint that allows for a range of movements in the foot, such as dorsiflexion and plantarflexion. This functional relationship is crucial for walking, running, and various activities that require foot mobility.

The other options involve different bones that do not form the ankle joint or involve incorrect pairings of bones. For instance, while the femur connects to the tibia at the knee joint, it does not play a role in the ankle articulation. Similarly, the calcaneus and navicular are tarsal bones in the foot but are not part of the ankle joint itself; rather, they participate in the subtalar joint, which is involved in foot motion but distinct from the ankle joint. Lastly, having two fibulae listed is anatomically incorrect, as there is only one fibula in the human leg.