Advanced Abductor Digiti Minimi Quiz

Q1. Which nerve may be compressed near the proximal deep surface of abductor digiti minimi in a recognized cause of plantar heel pain?

• Saphenous nerve
• First branch of the lateral plantar nerve
• Deep fibular nerve
• Common fibular nerve

Q2. Why can denervation of abductor digiti minimi be relevant on imaging in chronic heel pain?

• Denervation change can indicate involvement of its lateral plantar nerve supply
• It indicates femoral nerve injury
• It proves rupture of the Achilles tendon
• It demonstrates an ACL tear

Q3. How does the course of abductor digiti minimi make it relevant to lateral plantar compartment anatomy?

• It crosses the anterior ankle into the leg
• It lies between the tibia and fibula
• It forms a longitudinal muscular component of the lateral plantar region
• It forms the roof of the tarsal tunnel

Q4. Why would isolated paralysis of abductor digiti minimi not eliminate all movement of the fifth toe?

• Several other muscles also act on the fifth toe
• The quadriceps controls all toe movement
• The fifth toe has no other muscles
• The Achilles tendon directly abducts the fifth toe

Q5. How can abductor digiti minimi assist foot stability during stance despite being a small muscle?

• It is the main ankle dorsiflexor
• It directly forms the bony arch
• Its lateral plantar tension can contribute to dynamic stabilization of the lateral foot
• It replaces the plantar ligaments

Q6. Why is the proximal relationship of abductor digiti minimi important during surgical approaches to the lateral plantar heel?

• The common fibular nerve passes through its tendon
• The femoral artery lies inside the muscle
• Important lateral plantar neurovascular structures can lie near its deep surface
• The popliteal artery ends within the muscle

Q7. What anatomical finding would best distinguish an injury to the lateral plantar nerve from an isolated tendon injury of abductor digiti minimi?

• Absent patellar reflex alone
• Loss of all ankle dorsiflexion
• Weakness involving additional lateral plantar nerve supplied muscles
• Loss of quadriceps function

Q8. Why may the apparent size or distal attachment of abductor digiti minimi vary among individuals?

• Normal anatomical variation can alter its slips and insertion pattern
• It normally originates from the femur in some adults
• It commonly becomes part of the Achilles tendon
• The muscle always has an identical morphology

Q9. How does the muscle's insertion support its combined actions at the fifth toe?

• Its insertion lies on the distal tibia
• It acts through the extensor retinaculum
• Its tendon crosses only the ankle joint
• Its position relative to the fifth metatarsophalangeal joint permits both abduction and assisted flexion

Q10. Which statement best integrates the anatomy of abductor digiti minimi?

• It is a superficial lateral plantar intrinsic muscle that acts on the fifth toe and receives lateral plantar nerve supply
• It is a medial plantar muscle that adducts the great toe
• It is a dorsal deep-fibular-nerve muscle that extends the great toe
• It is an extrinsic posterior leg muscle that plantarflexes the ankle