Advanced Ilium Quiz

Q1. How does the ilium participate in transfer of body weight from the axial skeleton to the lower limb?

• It bypasses the acetabulum and loads the patella
• It transfers weight only through the pubic symphysis
• It transmits load from the sacroiliac region toward the acetabulum
• It transmits all load directly to the fibula

Q2. Why is the iliac tuberosity important for sacroiliac stability?

• It anchors strong sacroiliac ligaments
• It receives the patellar ligament
• It forms the obturator canal
• It forms the articular surface for the femoral head

Q3. What is the anatomical significance of the arcuate line of the ilium?

• It separates the acetabular fossa from the lunate surface
• It divides the femoral condyles
• It contributes to the pelvic brim and boundary between the greater and lesser pelvis
• It forms the lateral ankle

Q4. Why can forceful muscle contraction cause an ASIS avulsion injury in an adolescent athlete?

• The femoral head directly strikes the ASIS during running
• The ASIS has no muscular attachments
• The Achilles tendon attaches to the ASIS
• Traction can avulse an incompletely fused apophysis

Q5. Why can the anterior inferior iliac spine be involved in an apophyseal avulsion fracture?

• Gluteus maximus inserts on the AIIS
• Hamstrings originate from the AIIS
• Rectus femoris traction can avulse the immature AIIS
• The fibular collateral ligament attaches to the AIIS

Q6. Why is the iliac crest frequently used as a source of bone graft?

• It provides accessible bone suitable for graft harvest
• It has no muscular or ligamentous attachments
• It is the primary articular surface of the hip
• It contains no cancellous bone

Q7. Why are the gluteal lines important anatomical landmarks on the ilium?

• They form the obturator canal
• They mark the origin of the hamstrings
• They define the sacroiliac articular surface
• They mark regions of gluteal muscle origin

Q8. How does the ilium contribute to the acetabulum?

• The ilium does not contribute to the acetabulum
• Its crest forms the entire acetabular floor
• Only the iliac fossa contributes to the acetabulum
• Its body forms the superior portion of the acetabulum

Q9. Why are the ASIS and PSIS useful clinical landmarks?

• They form the articular cartilage of the acetabulum
• They provide palpable reference points for pelvic orientation and surface anatomy
• They are hidden completely by the femoral head
• They are located on the distal femur

Q10. Which statement best integrates the anatomy of the ilium?

• It is the inferior posterior component that forms only the ischial tuberosity
• It forms the lateral malleolus and ankle mortise
• It is the broad superior hip bone component linking sacroiliac load transfer, acetabular formation, and extensive soft tissue attachments
• It is a long bone that directly articulates with the tibia