Advanced Semitendinosus Quiz

Q1. Why is semitendinosus classified as a true hamstring muscle?

• It has the classic ischial origin, dual-joint course, and tibial sciatic innervation
• It is supplied by the obturator nerve
• It arises from the femur and receives femoral nerve supply
• It crosses only the knee

Q2. What functional deficit can follow a proximal tibial division sciatic nerve lesion affecting semitendinosus?

• Isolated loss of ankle dorsiflexion only
• Weakness of hip extension and knee flexion contributions
• Isolated quadriceps paralysis
• Increased hamstring strength

Q3. Why is the semitendinosus tendon commonly used for ligament reconstruction grafts?

• It provides a long accessible tendon suitable for graft preparation
• It has no functional role in the lower limb
• It is part of the patellar ligament
• It is the only tendon capable of knee flexion

Q4. Why can pes anserine bursitis produce pain near the semitendinosus insertion?

• The bursa lies behind the lateral malleolus
• The bursa lies inside the hip joint
• The bursa lies deep to the pes anserinus tendons near the medial tibia
• The tendon inserts into the patella

Q5. How does simultaneous hip flexion and knee extension affect semitendinosus length?

• They lengthen the muscle across both joints
• They convert it into a knee extensor
• They shorten the muscle across both joints
• They have no effect because it crosses only the knee

Q6. Why is semitendinosus vulnerable to strain during sprinting?

• It undergoes high eccentric loading during rapid lengthening
• It crosses only the ankle
• It remains inactive throughout sprinting
• It functions only as a static ligament

Q7. Which anatomical feature makes the semitendinosus tendon relatively easy to identify near the medial knee?

• It inserts deeply on the fibular head
• It blends into the quadriceps tendon
• Its long superficial cord-like tendon enters the pes anserinus
• It passes through the adductor hiatus

Q8. How can semitendinosus be distinguished from semimembranosus during posterior thigh dissection?

• It lies in the anterior thigh
• It is more superficial and has a long cord-like distal tendon
• It is broader and deeper with a membranous proximal tendon
• It inserts on the fibular head

Q9. What rotational deficit most directly follows loss of semitendinosus function?

• Reduced medial rotation of the flexed leg
• Loss of knee extension
• Reduced lateral rotation only
• Loss of ankle inversion

Q10. Which statement best integrates semitendinosus anatomy?

• It is a femoral-nerve-supplied quadriceps muscle inserting on the patella
• It is a common-fibular-nerve-supplied leg muscle inserting on the fifth metatarsal
• It is a medial hamstring with ischial origin, pes anserinus insertion, tibial sciatic innervation, and actions at both hip and knee
• It is an obturator-nerve-supplied adductor that crosses only the hip