Advanced Iliacus Quiz

Q1. Why can an iliacus hematoma potentially affect femoral nerve function?

• The tibial nerve crosses the iliac fossa
• The femoral nerve lies close to iliacus beneath the iliac fascia
• The sciatic nerve passes through iliacus
• The obturator nerve lies inside the iliacus tendon

Q2. Why can painful iliacus or iliopsoas pathology be aggravated by passive hip extension?

• Hip extension closes the obturator canal
• Hip extension lengthens the iliacus component of iliopsoas
• Hip extension maximally shortens iliacus
• Hip extension isolates the quadriceps tendon

Q3. Why is the iliac fascia clinically important in relation to iliacus?

• It can confine an expanding process around iliacus
• It forms the acetabular labrum
• It encloses the sciatic nerve in the posterior thigh
• It becomes the patellar ligament

Q4. How does the broad origin of iliacus contribute to its mechanical role?

• Its fibers diverge from the femur toward the tibia
• Broad pelvic fibers converge toward the iliopsoas insertion
• Its fibers insert into the acetabular labrum
• Its tendon crosses the knee to increase leverage

Q5. Why can iliacus weakness reduce hip flexion without abolishing it completely?

• The obturator nerve automatically replaces femoral nerve function
• Hip flexion is produced only by knee extensors
• Iliacus is the only muscle capable of hip flexion
• Other hip flexors, including psoas major, can still generate flexion

Q6. How can iliacus contribute to limb advancement during gait?

• It advances the limb by adducting the scapula
• It advances the limb by extending the knee only
• It advances the limb by plantarflexing the ankle throughout swing
• It contributes to forward advancement of the thigh through hip flexion

Q7. Why is the femoral nerve vulnerable to compression in the iliacus region despite not passing through the muscle belly?

• It passes through the greater sciatic foramen
• It is enclosed by the obturator membrane
• It runs inside the iliacus tendon
• It lies in a confined interval adjacent to iliacus

Q8. Which feature helps distinguish iliacus from psoas major during anatomical dissection?

• Iliacus lies within the adductor canal
• Iliacus lies medial to the vertebral bodies
• Iliacus fills the iliac fossa lateral to psoas major
• Iliacus forms the posterior wall of the popliteal fossa

Q9. Why may an enlarged iliopsoas bursa be anatomically related to iliacus symptoms?

• The bursa lies inside the iliac crest
• The bursa surrounds the sciatic nerve
• The bursa lies behind the knee
• Iliacus contributes to the tendon complex adjacent to the bursa

Q10. Which statement best integrates the anatomy of iliacus?

• It links the femur to the calcaneus as a tibial-nerve-supplied plantarflexor
• It links the iliac fossa to the proximal femur as a femoral-nerve-supplied hip flexor
• It links the pubis to the tibia as an obturator-nerve-supplied knee extensor
• It links the sacrum to the greater trochanter as an inferior-gluteal-nerve-supplied extensor