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Flashcards in Lumbar plexus Deck (8):
1

What are the nerve roots of lateral femoral cutaneous nerve and what does it innervate?

L2, L3
pure sensory, innervating skin of lateral thigh down to the knee

2

What are the nerve roots of anterior cutaneous femoral nerve and what does it innervate?

L2 & L3
innervating skin of anterior thigh down to the knee

3

What are the branches of the lumbar plexus?

anterior rami of L1-L4 leaving via intervertebral foramina of vertebral column

4

Where does the psoas and iliacus nerve branch off and what are it's nerve roots?

iliacus & psoas branch off the femoral nerve
iliacus: L2, L3
Psoas major (L1-3)
Psoas minor (L1, L2)

5

What are the nerve roots of the femoral nerve and what does it innervate?

L2, L3, L4
MOTOR: L2, L3 - pectineus, iliacus, sartorius
L2, L3, L4 - quadriceps femoris: rectus femoris, vastus lateralis, vastus medialis, vastus intermedius
SENSORY: anterior & lateral cutaneous branch: anterior & lateral thigh
saphenous nerve: medial leg (ant. & post.)

6

What does the obturator nerve innervate and what are the nerve roots?

L2, L3, L4 (same as femoral)
MOTOR: (medial thigh) adductor brevis, adductor longus, adductor portion of adductor magnus, gracilis, obturator externus
SENSORY: middle of medial thigh (cutaneous branch of obturator nerve)

7

What is the lumbosacral trunk composed of and what does it form?

L4 & L5
join to sacral plexus at pelvis

8

What does the genitofemoral nerve divide into and what are it's nerve roots?

divides into femoral and genital branch after leaving psoas major, nerve roots: L1, L2