Arthrology of lower leg and ankle

Question 1

Which ligaments are present in the superior tibiofibular joint?

Answer 1

• Anterior superior tibiofibular ligament
• Posterior superior tibiofibular ligament

Question 2

What is the joint classification of the inferior tibiofibular joint?

Answer 2

Syndesmosis (fibrous) joint

Question 3

What ligaments are present in the inferior tibiofibular joint?

Answer 3

• Interosseous ligament
• Anterior and posterior inferior tibiofibular ligaments
• Transverse tibiofibular ligament: extends the posterior articular surface of the tibia

Question 4

What is the role of the interosseous membrane?

Answer 4

• Compartmentalises the lower leg
• Provides a point for muscle attachment
• Transmits force from the weightbearing tibia onto the non-weightbearing fibula
• Prevents separation of the two lower leg bones

Question 5

Describe the arrangement of the fibrous capsule of the talocrural joint

Answer 5

• The joint capsule is thin in an AP direction to allow for movement
• It is reinforced medially and laterally by ligaments
• The capsule is relatively loose, to accommodate for plantarflexion