Intermediate Obturator Nerve Quiz

Q1. What is the relationship of the obturator nerve to the pelvic brim after it emerges from psoas major?

• It descends along the lateral pelvic wall toward the obturator canal
• It exits through the greater sciatic foramen
• It enters the deep inguinal ring
• It crosses the iliacus toward the ASIS

Q2. Which muscle is commonly supplied by the anterior division of the obturator nerve?

• Adductor longus
• Vastus lateralis
• Gluteus maximus
• Biceps femoris long head

Q3. Which muscle is primarily supplied by the posterior division of the obturator nerve?

• Obturator externus
• Gluteus medius
• Sartorius
• Rectus femoris

Q4. What is the relationship of the anterior division of the obturator nerve to adductor brevis?

• It lies posterior to adductor magnus
• It remains within the obturator canal
• It lies anterior to adductor brevis
• It runs inside the femoral artery

Q5. What is the relationship of the posterior division of the obturator nerve to adductor brevis?

• It lies posterior to adductor brevis
• It passes through the femoral canal
• It lies within the saphenous nerve
• It lies anterior to adductor longus

Q6. Which joint commonly receives an articular branch from the obturator nerve?

• Hip joint
• Temporomandibular joint
• Elbow joint
• Shoulder joint

Q7. Which additional joint may receive articular fibers from the posterior division of the obturator nerve?

• Sternoclavicular joint
• Atlantoaxial joint
• Knee joint
• Wrist joint

Q8. Which muscle has dual innervation, with its adductor part supplied by the obturator nerve and its hamstring part supplied by the tibial division of the sciatic nerve?

• Obturator externus
• Adductor longus
• Adductor magnus
• Gracilis

Q9. Why can isolated obturator nerve injury cause only a small or inconsistent area of sensory loss?

• The nerve has no sensory fibers
• All of its sensory fibers end in psoas major
• Its cutaneous territory is variable and overlaps with other nerves
• It supplies the entire lower limb

Q10. Which feature distinguishes the obturator nerve from the femoral nerve within the lumbar plexus?

• Obturator uses anterior divisions and emerges medial to psoas major
• Obturator passes beneath the inguinal ligament lateral to the femoral artery
• Femoral arises from the sacral plexus
• Obturator is purely autonomic