Lumbar plexus Flashcards
Where is the lumbar plexus located?
Lumbar region
Within psoas major muscle
What forms the lumbar plexus?
Anterior rami of spinal nerves L1, L2, L3, L4
Contributions from T12
What are the peripheral nerves of the lumbar plexus?
Ilioinguinal nerve Genitofemoral nerve Lateral cutaneous nerve of thigh Femoral nerve Obturator nerve
What are the nerve roots of the ilioinguinal nerve?
L1
What is the sensory innervation of the ilioinguinal nerv?
Upper medial thigh
What are the nerve roots of the genitofemoral nerve?
L1, L2
What are the nerve roots of the lateral cutaneous nerve of thigh?
L2, L3
What is the sensory innervation of the lateral cutaneous nerve of the thigh?
Anterior and lateral thigh
What are the nerve roots of the femoral nerve?
L2, L3, L4
What is the motor function of the femoral nerve?
Anterior thigh muscles
- iliacus
- pectineus
- quadriceps femoris
- sartorius
What is the sensory innervation of the femoral nerve?
Anterior cutaneous nerve of thigh - anterior and medial thigh (branch of femoral nerve)
Saphenous nerve - anterior and medial leg
What are the nerve roots of the obturator nerve?
L2, L3, L4
What are the motor functions of the obturator nerve?
Pectineus - may receive branch of obturator nerve
Medial thigh muscles
- adductor brevis, longus and magnus
- gracilis
- obturator externus
What are the sensory functions of the obturator nerve?
Middle medial thigh
