Advanced Medial Malleolus Quiz

Q1. Why can a medial malleolar fracture compromise ankle stability?

• It has no relationship to ankle ligaments
• It affects only the knee extensor mechanism
• It removes the lateral fibular wall
• It can disrupt both the medial mortise and deltoid ligament attachment

Q2. Why is accurate reduction important when a medial malleolar fracture involves the articular surface?

• The medial malleolus is entirely extra-articular
• The talus never contacts the medial malleolus
• Only the calcaneus bears ankle load
• Residual displacement can produce ankle articular incongruity and abnormal load distribution

Q3. How can deltoid ligament injury affect the relationship between the talus and medial malleolus?

• It causes isolated patellar displacement
• It closes the distal tibiofibular joint
• It can permit abnormal talar displacement and medial clear-space widening
• It fixes the talus more tightly to the tibia

Q4. Why is the medial malleolus an important landmark when evaluating tarsal tunnel anatomy?

• The common fibular nerve winds around it
• The femoral triangle lies directly behind it
• The tarsal tunnel contents pass directly posterior and inferior to it
• The popliteal artery crosses its anterior surface

Q5. What is the relationship between the medial malleolus and the deep deltoid ligament?

• Deep deltoid fibers connect the medial malleolus to the talus
• They connect the navicular to the cuboid only
• They attach the patella to the tibia
• Deep deltoid fibers connect the fibular head to the calcaneus

Q6. Why can a fracture near the medial malleolus coexist with injury elsewhere in the ankle ring?

• The medial ankle is mechanically isolated
• All medial malleolar fractures are caused only by direct impact
• Ankle forces can disrupt multiple components of the mortise and ligamentous ring
• The syndesmosis has no relationship to ankle stability

Q7. Why is the medial malleolus clinically useful as a pulse landmark?

• The posterior tibial artery passes just posterior to it
• The femoral artery terminates at its tip
• The dorsalis pedis artery crosses directly behind it
• The popliteal artery lies superficial to its medial surface

Q8. How does dorsiflexion influence stability of the talus within the ankle mortise?

• The talus completely leaves the mortise
• The wider anterior talar trochlea engages the mortise more firmly
• The fibula becomes unrelated to the ankle
• The medial malleolus stops articulating with the talus

Q9. Why can growth-related injury near the medial malleolus matter in children and adolescents?

• The medial malleolus develops entirely from the talus
• The distal tibial physis may be involved, creating risk to growth and alignment
• The distal tibia has no growth plate
• Only the proximal fibula contributes to tibial growth

Q10. Which statement best integrates the anatomy of the medial malleolus?

• It forms the lateral wall of the acetabulum
• It is a fibular projection that anchors the lateral ankle ligaments
• It is a sesamoid bone within the quadriceps tendon
• It integrates talar articulation, medial mortise stability, deltoid attachment, and tarsal tunnel relationships