- 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