Intermediate Flexor Digitorum Longus Quiz

Q1. Where does flexor digitorum longus arise in relation to the soleal line?

• Posterior tibia inferior to the soleal line
• Anterior tibia superior to the tibial tuberosity
• Medial femoral condyle
• Posterior fibula above the head

Q2. What is the course of the flexor digitorum longus tendon at the ankle?

• Superficial to the patellar ligament
• Behind the medial malleolus beneath the flexor retinaculum
• Through the extensor retinacula
• Anterior to the lateral malleolus

Q3. In the tarsal tunnel, which tendon lies immediately anterior to the flexor digitorum longus tendon in the classic arrangement?

• Tibialis posterior tendon
• Flexor hallucis longus tendon
• Fibularis brevis tendon
• Extensor hallucis longus tendon

Q4. Which structure modifies the pull of flexor digitorum longus tendons in the sole?

• Extensor digitorum brevis
• Tibialis anterior
• Quadratus plantae
• Fibularis tertius

Q5. What important tendon crossing occurs between flexor digitorum longus and flexor hallucis longus in the sole?

• They never approach each other
• They fuse within the Achilles tendon
• They cross at the knot of Henry
• They cross behind the fibular head

Q6. Which joints can flexor digitorum longus flex in toes two through five?

• Metatarsophalangeal joints only
• Subtalar joints only
• Metatarsophalangeal, proximal interphalangeal, and distal interphalangeal joints
• Distal interphalangeal joints only

Q7. How does flexor digitorum longus contribute to the longitudinal arches of the foot?

• It acts only at the knee
• It provides dynamic support to the longitudinal arches
• It eliminates all subtalar motion
• It forms the bony medial arch

Q8. Which nerve roots are commonly associated with tibial nerve innervation of flexor digitorum longus?

• C8 and T1
• L1 and L2
• L3 and L4
• S2 and S3

Q9. What happens to the flexor digitorum longus tendon after it enters the sole?

• It divides into two tendons for the great toe
• It joins the Achilles tendon
• It inserts entirely on the navicular
• It divides into four digital tendons

Q10. During push-off, what functional contribution can flexor digitorum longus make?

• It extends the toes and dorsiflexes the ankle
• It helps stabilize the toes and assists plantarflexion
• It unlocks the knee by rotating the femur
• It abducts the hip