Flashcards in Lumbar plexus Deck (8):
What are the nerve roots of lateral femoral cutaneous nerve and what does it innervate?
pure sensory, innervating skin of lateral thigh down to the knee
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
What are the branches of the lumbar plexus?
anterior rami of L1-L4 leaving via intervertebral foramina of vertebral column
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)
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.)
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)
What is the lumbosacral trunk composed of and what does it form?
L4 & L5
join to sacral plexus at pelvis