Intermediate Semimembranosus Quiz

Q1. How is the proximal tendon of semimembranosus characteristically shaped?

• Broad and membranous
• Absent proximally
• Continuous with the patellar ligament
• Round and cord-like throughout

Q2. Which spinal root levels commonly contribute to semimembranosus innervation?

• L2, L3, and L4
• L5, S1, and S2
• S3, S4, and S5
• L1, L2, and L3

Q3. Which artery is an important source of blood to semimembranosus in the posterior thigh?

• Anterior tibial artery
• Perforating branches of the profunda femoris artery
• Dorsalis pedis artery
• Medial plantar artery

Q4. Which structure forms the superomedial boundary of the popliteal fossa?

• Semimembranosus and semitendinosus
• Popliteus alone
• Biceps femoris alone
• Gastrocnemius lateral head alone

Q5. Which expansion of the semimembranosus tendon reinforces the posterior knee capsule?

• Fibular collateral ligament
• Iliofemoral ligament
• Oblique popliteal ligament
• Patellar ligament

Q6. Which bursa is classically related to the semimembranosus tendon and medial head of gastrocnemius?

• Prepatellar bursa
• Subcutaneous infrapatellar bursa
• Trochanteric bursa
• Semimembranosus-gastrocnemius bursa

Q7. How does semimembranosus differ from biceps femoris in rotational action at a flexed knee?

• Semimembranosus laterally rotates the leg
• Semimembranosus medially rotates the leg
• Both only laterally rotate the leg
• Neither can influence rotation

Q8. What is the relationship of semitendinosus to semimembranosus in much of the posterior thigh?

• Semitendinosus is more superficial
• They lie in different thigh compartments
• Semitendinosus is entirely deep to semimembranosus
• Semitendinosus lies within vastus medialis

Q9. Why can semimembranosus help control the trunk and pelvis during stance?

• It abducts the scapula
• It extends the knee through the patella
• Its hip extensor force can help stabilize the hip and trunk
• It dorsiflexes the ankle

Q10. Which feature distinguishes the distal attachment of semimembranosus from semitendinosus?

• Both insert on the fibular head
• Semimembranosus inserts at the pes anserinus
• Both insert through the patellar tendon
• Semimembranosus inserts on the posteromedial tibial condyle