THRC.21

Question 1

List the nerves of the lumbar plexus

Answer 1

• Lumbar nerves
• Iliohypogastric nerves
• Ilioinguinal nerve
• Genitofemoral nerve
• The lateral cutaneous nerve of the femur
• Saphenous nerve
• Obturator nerve

Question 2

List the nerves of the proper lumbar plexus

Answer 2

• Genitofemoral nerve
• Lateral cutaneous femoral nerve
• Femoral nerve
• Obturator nerve

Question 3

Answer 3

L₄

Question 4

Answer 4

L₅

Question 5

Answer 5

L₆

Question 6

Answer 6

Genitofemoral nerve

Question 7

Answer 7

Femoral nerve

Question 8

Answer 8

Obturator nerve

Question 9

The lumbar plexus is composed with…

Answer 9

Ventral branches of the lumbar spinal nerves

Question 10

L₁-L₃ are considered to be…

Answer 10

Individual nerves, not included in the plexus

Question 11

Give the path of the iliohypogastric nerve

Answer 11

• L₁ +[L₂ forms caudal iliohypogastric in Ca]
• Branches:
  
  • Lateral + medial branch
    
    • Medial → Inguinal region
    • Lateral → Skin of the abdomen

Question 12

Give the path of the ilioinguinal nerve

Answer 12

• L₂ [L₃ in Car]
• Similar branching to iliohypogastric

Question 13

Give the path of the genitofemoral nerve

Answer 13

• L₃-L₄
• Runs within lumbar muscles → Inguinal canal
• Branches to
  
  • Inguinal mammary glands
  • Prepuce/scrotum
  • Vulva (Fe/Ca)

Question 14

Give the path of the lateral cutaneous femoral nerve

Answer 14

• L₄
• Innervates:
  
  • Inner lumbar muscles
  • Skin over stifle and distal thigh

Question 15

Give the path of the femoral nerve

Answer 15

• L4-L ₆
• Branches:
  
  • Lumbar muscles
  • Saphenous nerve
    
    • Femoral canal
    • Medial muscles of the thigh
    • Quadriceps femoris
    • Skin over medial hock

Question 16

Give the path of the obturator nerve

Answer 16

• L₄-L₆
• Follows medial aspect of the ilium → Obturator foramen
• Branches:
  
  • Adductor muscles

Question 17

Answer 17

Iliohypogastric nerve

Question 18

Answer 18

Ilioinguinal nerve

Question 19

Answer 19

Lateral cutaneous femoral nerve

Question 20

Answer 20

Genitofemoral nerve

Question 21

Answer 21

Femoral nerve

Question 22

Answer 22

Saphenous nerve

Question 23

Answer 23

Obturator nerve