Which anatomical feature is described as the pulley-like structure that interfaces with the fibula at the ankle?

• A. Fibular trochlea
• B. Tibial plafond
• C. Medial malleolus
• D. Talus dome

Answer: (A)

The pulley-like structure at the ankle is the fibular trochlea. This feature sits on the distal fibula and forms a pulley-like groove for the tendons of the peroneal muscles to wrap around as they pass behind the lateral malleolus. The term “trochlea” itself implies a pulley, which is why this structure is described this way. The other terms refer to parts of the ankle that aren’t organized as a pulley around the fibula: the tibial plafond is the bottom part of the tibia that forms the ankle joint surface, the medial malleolus is the inner ankle projection, and the talus dome is the top surface of the talus.