Which bones are involved in forming the ankle joint?

• A. Tibia, fibula, and talus
• B. Femur, patella, and tibia
• C. Fibula, tarsals, and talus
• D. Calcaneus, navicular, and metatarsals

Answer: (A)

The ankle joint, also known as the talocrural joint, is primarily formed by the tibia, fibula, and talus. The tibia and fibula are the two long bones in the lower leg. The tibia is the larger and weight-bearing bone, while the fibula runs alongside it and provides stability.

At the distal end of the tibia, there is a bony prominence called the medial malleolus, and at the end of the fibula, there is the lateral malleolus. These two features help form the socket of the ankle joint. The talus is a tarsal bone that sits above the calcaneus (heel bone) and connects the foot to the leg. It is shaped in such a way that it articulates with both the tibia and fibula, allowing for the complex movements of the ankle.

This configuration creates a hinge-like joint that permits dorsiflexion and plantarflexion of the foot, which are essential movements for walking, running, and other activities. The other choices reference bones that do not contribute to the formation of the ankle joint or include incorrect combinations of bones. By focusing on the correct bones, one can better understand the functional anatomy of the ankle