Ankle & Foot Anatomy

Question 1

Joints at the ankle

Answer 1

Talocrural joint - the fibula and tibia, articulate with the talus. Where plantar and dorsi flexion occurs.
Sub-talar joint - Between tarsal bones in the foot: the talus and calcaneus. Allows for inversion and eversion.

Inferior Tibiofibular joint - articulations between the distil tibia and fibula

Question 2

Ligaments at the Talocrural joint (Lateral)

Answer 2

Lateral collateral ligaments:
1. Anterior talofibular - lateral malleolus of the fibula to the lateral side of the neck of the talus. Weakest and most frequently injured.
2. Posterior talofibular - fibula to the lateral tubercle of the talus.
3. Calcaneofibular - apex of the lateral malleolus of the fibula to tubercle on the lateral aspect of the calcaneus.

Question 3

Ligaments at the Talocrural joint (medial)

Answer 3

Medial collateral ligament:
1. Deltoid (Splits into 4 - tibiocalcaneal, tibionavicular, tibiotalar A&P parts) - important to stabilise the ankle joint in eversion and prevent dislocations of the joint. Medial malleolus to the talus, calcaneus, and navicular bones.

Question 4

Ligaments at the Sub-talar joint

Answer 4

1. Talocalcaneal - Talus to calcaneus

Question 5

Ligaments at the Inferior Tibiofibular joint

Answer 5

1. Anterior tibiofibular - Anterior distal tibia and fibula
2. Posterior tibiofibular - Posterior distal tibia and fibula
3. Inferior transverse - Medial malleolus to fibula