Advanced Pubofemoral Ligament Quiz

Q1. How can injury to the pubofemoral ligament affect hip stability?

• It can reduce passive anteroinferior capsular restraint
• It directly paralyzes the quadriceps
• It eliminates the acetabular labrum
• It fixes the hip in flexion

Q2. Why is the pubofemoral ligament relevant during anterior or anteromedial capsular surgery?

• It passes through the sciatic foramen
• It lies only behind the knee
• It is confined to the femoral shaft
• It forms part of the anteroinferior capsule encountered surgically

Q3. How can capsular repair restore some function of the pubofemoral ligament after surgical release?

• It eliminates all hip rotation
• It converts the ligament into muscle
• It can restore passive tension across the anteroinferior capsule
• It replaces the femoral head

Q4. Why does the pubofemoral ligament provide position-dependent rather than constant restraint?

• Its bony attachments move to different bones
• It contracts rhythmically
• It is absent during flexion
• Fiber tension changes with hip position

Q5. Which biomechanical feature allows the pubofemoral ligament to stabilize the hip without muscular effort?

• Motor neurons cause it to shorten
• Synovial fluid actively contracts it
• Cartilage fibers generate muscle force
• Passive tensile force develops when its fibers are stretched

Q6. Why can excessive capsular laxity increase femoral head translation?

• It enlarges the tibial plateau
• Reduced ligament tension permits greater accessory motion
• It fuses the acetabulum to the femur
• It lengthens the femoral neck

Q7. How does the pubofemoral ligament complement the iliofemoral ligament?

• It adds inferomedial restraint to the broader anterior capsular complex
• It stabilizes only the posterior knee
• It replaces the iliofemoral ligament completely
• It is the main tendon of a hip adductor

Q8. Why can descriptions of the pubofemoral ligament's distal attachment vary among anatomical sources?

• It has no femoral relationship
• It is always completely separate from the capsule
• It normally changes origin after birth
• Its fibers blend with adjacent capsular structures and have less discrete boundaries

Q9. What finding would most directly indicate loss of pubofemoral ligament function?

• Loss of ankle dorsiflexion only
• Absent knee extension only
• Increased abduction and extension laxity
• Loss of toe flexion only

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

• It is an intracapsular tendon that actively adducts the hip
• It is an anteroinferior hip capsular ligament that limits excessive abduction and extension through passive tension
• It is a posterior ligament from the ischium that primarily limits knee flexion
• It is a distal limb ligament connecting the tibia and fibula