Beginner Lumbar Plexus Quiz

Q1. Which spinal nerve anterior rami primarily form the lumbar plexus?

• T1 through T4
• L5 through S4
• C5 through T1
• L1 through L4

Q2. Within which muscle is most of the lumbar plexus formed?

• Piriformis
• Psoas major
• External oblique
• Rectus abdominis

Q3. Which major nerve of the lumbar plexus emerges from the lateral border of psoas major and supplies the anterior thigh?

• Obturator nerve
• Pudendal nerve
• Femoral nerve
• Sciatic nerve

Q4. Which lumbar plexus nerve emerges from the medial border of psoas major and enters the pelvis?

• Femoral nerve
• Lateral femoral cutaneous nerve
• Iliohypogastric nerve
• Obturator nerve

Q5. Which nerve supplies the skin of the lateral thigh?

• Ilioinguinal nerve
• Obturator nerve
• Lateral femoral cutaneous nerve
• Femoral branch of genitofemoral nerve

Q6. Which lumbar plexus nerve divides into genital and femoral branches?

• Genitofemoral nerve
• Iliohypogastric nerve
• Femoral nerve
• Obturator nerve

Q7. Which nerve commonly arises from L1 and supplies part of the lower anterior abdominal wall?

• Sciatic nerve
• Superior gluteal nerve
• Iliohypogastric nerve
• Tibial nerve

Q8. Which nerve commonly arises from L1 and passes through part of the inguinal canal?

• Obturator nerve
• Femoral nerve
• Ilioinguinal nerve
• Common fibular nerve

Q9. What is the largest branch of the lumbar plexus?

• Genitofemoral nerve
• Ilioinguinal nerve
• Femoral nerve
• Iliohypogastric nerve

Q10. Which lumbar plexus nerve primarily supplies the medial compartment of the thigh?

• Femoral nerve
• Subcostal nerve
• Obturator nerve
• Lateral femoral cutaneous nerve