Advanced Iliofemoral Ligament Quiz

Q1. Why is the iliofemoral ligament particularly important for anterior hip stability?

• It is the only structure attaching the femoral head to the acetabulum
• It provides strong passive restraint across the anterior hip capsule
• It primarily stabilizes the posterior knee
• It acts as the main hip abductor

Q2. How can disruption of the iliofemoral ligament affect hip biomechanics?

• It eliminates acetabular cartilage
• It directly shortens the femoral neck
• It prevents all knee motion
• It can increase anterior capsular laxity and excessive motion

Q3. Why is the iliofemoral ligament relevant during anterior surgical approaches to the hip?

• Its fibers form part of the anterior capsule encountered surgically
• It passes through the obturator canal
• It is confined to the knee joint
• It lies only behind the ischial tuberosity

Q4. How can the superior and inferior bands contribute differently to rotational restraint?

• Only the inferior band attaches to bone
• The superior band is a muscle tendon
• Both bands have identical orientation and tension in every position
• Their distinct fiber orientations produce position-dependent restraint

Q5. Why is the intertrochanteric line an important landmark for understanding this ligament?

• It receives the distal attachment of the iliofemoral ligament
• It is the origin of the ligament of the head of the femur
• It is located on the tibia
• It forms the acetabular labrum

Q6. Why does capsular laxity increase when the hip moves from extension into flexion?

• Flexion causes the ligament to ossify temporarily
• Flexion removes the femoral head from the capsule
• Flexion moves the intertrochanteric line onto the pelvis
• Flexion unwinds the capsular fibers and reduces passive tension

Q7. How can excessive anterior capsular release potentially influence postoperative stability?

• It strengthens the iliofemoral ligament automatically
• It affects only the ankle mortise
• It can reduce passive anterior restraint if the capsule is not adequately restored
• It fuses the femoral head to the acetabulum

Q8. Which biomechanical concept best explains why the iliofemoral ligament can stabilize the hip without active contraction?

• Articular cartilage generates action potentials
• Passive tension develops as the ligament is stretched
• Synovial fluid contracts the ligament
• The ligament contains motor units that actively shorten

Q9. Why is the iliofemoral ligament less restrictive to many movements when the hip is flexed?

• Flexion converts it into articular cartilage
• Its fibers are relatively lax and unwound in flexion
• The ligament moves into the knee joint
• Its femoral attachment disappears in flexion

Q10. Which statement best integrates the anatomy of the iliofemoral ligament?

• It is a knee ligament connecting the femur and tibia
• It is an anterior capsular reinforcement from the ilium to the intertrochanteric line that limits extension and supports hip stability
• It is a posterior ligament from the ischial tuberosity to the lesser trochanter that flexes the hip
• It is an intracapsular ligament attaching the femoral head to the acetabular notch