- Anatomy:
- primary ventral rami of five lumbar nerves and of first four sacral nerves combine to form the lumbar (
L1,
L2,
L3,
L4) &
lumbosacral
(
L4,
L5,
S1,
S2,
S3, S4) plexuses, each giving rise to anterior and posterior branches;
- anterior branches supply flexor muscles of limb, while posterior branches supply extensor and abductor muscles;
- largest of these derivatives are
femoral &
obturator nerve;
- cutaneous branches include:
-
lioinguinal (
L1),
genitofemoral nerve (
L1,
L2),
iliohypogastric, nerve nerve (
L1) &
lateral cutaneous nerve of thigh (
L2,
L3)
supplying lateral & anterolateral thigh
