Npte - Msk - Lumbar Plexus

Front 1

Iliohypogastric Nerve

Back 1

• T12, L1
• Internal oblique and TA; Sensation of posterolateral gluteal skin

Front 2

Ilioinguinal Nerve

Back 2

• L1
  
• Internal oblique and TA; Sensation of the upper medial thigh, and either penis, anterior scrotum or mons pubis, labia majora

Front 3

Genitofemoral Nerve

Back 3

• L1, L2
  
• Genital branch innervates cremaster and sensation from either anterior scrotum or mons pubis and labia majora; Femoral branch innervates upper anterior thigh

Front 4

Lateral Cutaneous Nerve of the Thigh

Back 4

• L2, L3
• Susceptible to entrapment near the ASIS or inguinal ligament, causing meralgia paraesthetica
  

Front 5

Obturator Nerve

Back 5

• L2, L3, L4
• Obturator externus, adductor compartment

Front 6

Femoral Nerve

Back 6

• L2, L3, L4
  
• Iliacus, pectineus, sartorius, quad

Front 7

Back 7

• Saphenous nerve, a branch of the femoral nerve
  

Front 8

Back 8

• Anterior cutaneous branch of the femoral nerve

Front 9

Back 9

• Cutaneous branch of the obturator nerve
  

Front 10

Back 10

• Lateral cutaneous nerve of the thigh
  
• L2, L3
• Entrapment possible, termed meralgia paraesthetica

Front 11

Back 11

• Femoral branch of genitofemoral nerve
  
• L1, L2
  

Front 12

Back 12

• Ilioinguinal
  
• L1