Question

multiple choice question

the lateral (collateral) ligament binds the ______ to the foot on the lateral side.

fibula

heel

tibia

great toe

Explanation:

Identify the anatomical region and structures

The question asks about the lateral (collateral) ligament of the ankle joint. This ligament complex is located on the lateral side of the ankle and foot. We need to determine which bone it binds to the foot on this lateral side.

Analyze the lateral ankle anatomy

Using the Ankle Joint Anatomy knowledge point, we know that the ankle joint (talocrural joint) is formed by the distal ends of the tibia and fibula articulating with the talus of the foot. The lateral side of the leg is formed by the fibula, as established by the Fibula Function knowledge point.

Evaluate the ligament attachments

The lateral collateral ligament of the ankle consists of three distinct bands: the anterior talofibular ligament, the posterior talofibular ligament, and the calcaneofibular ligament. These ligaments originate on the lateral malleolus of the fibula and attach to the tarsal bones of the foot (the talus and calcaneus). Therefore, the lateral (collateral) ligament binds the fibula to the foot on the lateral side.

Compare with other options

• fibula: Correct, as the fibula is the lateral bone of the lower leg.
• heel: Incorrect, the heel (calcaneus) is part of the foot itself to which the ligament attaches, not the leg bone being bound to the foot.
• tibia: Incorrect, the tibia is the medial bone of the lower leg, associated with the medial (deltoid) ligament.
• great toe: Incorrect, this is a distal medial structure of the foot.

Answer:

• fibula (Correct answer)
• heel
• tibia
• great toe