At L2 rami split into anterior and posterior divisions
How many segments does the lumbosacral plexus involve?
ventral rami of spinal nerves L1-S4
What does the lumbar plexus supply innervation to?
Muscles and skin of the anterior and medial thigh and skin of medial leg and foot.
What do anterior fibers correlate with?
anterior goes with pre axial *L1 is anterior division nerve
arises from L1 (sometimes T12) passes inferiorly and laterally across quadratus lumborum (extends and laterally flexes vertebral column) then the nerve innervates abdominal musculature and supplies skin of suprapubic region and upper gluteal
arises from L1. Also supplies abdominal muscles. It transverses inguinal canal and emerges through superficial inguinal ring. Cutaneous branches to upper medial thigh and anterior scrotum or labia majus.