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Lumbar Plexus
nerve specifics
11
Anatomy
Graduate
06/25/2009

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Cards

Term
subcostal nerve
Definition
T12
Term
iliohypogastric nerve
Definition
L1
skin: gluteal and hypogastric skin
muscles: external abdominal oblique, internal abdominal oblique, and transversus abdominis
Term
ilioninguinal nerve
Definition
L1
skin: groin, scrotum/labia majorum
muscle: external and internal abdominal obliques, transversus abdominis
Term
genitofemoral
Definition
L1-L2
skin: mons pubis, labia majorum/scrotum, femoral triangle
muscle: cremaster
Term
lateral femoral cutaneous nerve
Definition
L2-L3
skin: anterior lateral aspect of the thigh
Term
femoral nerve
Definition
L2-L4
skin: anterior and medial aspect of the leg and foot via saphenous branch
muscle: iliacus, pectineus, sartorius, quadriceps femoris
joint: articular capsule of hip and knee joints
Term
obturator nerve
Definition
L2-L4
skin: medial surface of thigh
muscle: gracilis, adductor brevis, adductor longus, adductor magnus, obturator externus
*sometimes pectineus via accessory obturator nerve
joint: articular capsule of hip and knee joints
Term
tibial nerve
Definition
L4 and L5, S1-S3
Term
pudendal nerve
Definition
anterior divisions of S2-S4
innervations:
sensory: lower half of anal canal, perianal skin, genitalia in both sexes
muscle: perineum
Term
posterior femoral cutaneous nerve
Definition
anterior and posterior divisions of VPR S2 and S3
*only nerve that gets contributions from both ends
Term
common peroneal
Definition
L4 and L5, S1 and S2
*almost exactly like tibial; they run together
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