Lateral Cutaneous Branch of Iliohypogastric Nerve

The lateral cutaneous branch (iliac branch) pierces the Obliqui internus and externus immediately above the iliac crest, and is distributed to the skin of the gluteal region, behind the lateral cutaneous branch of the last thoracic nerve; the size of this branch bears an inverse proportion to that of the lateral cutaneous branch of the last thoracic nerve.

When harvesting bone from the anterior iliac crest (AICBG), the lateral cutaneous branch of the Iliohypogastric nerve (L1) is most likely to be injured.

This article incorporates text from a public domain edition of Gray's Anatomy.

Nerves of lower limbs and lower torso: the lumbosacral plexus (L1–Co) (TA A14.2.05–07GA 9.948)
lumbar
plexus
(L1–L4)
iliohypogastric
ilioinguinal
  • anterior scrotal ♂/labial ♀
genitofemoral
  • femoral branch/lumboinguinal
  • genital branch
lateral cutaneous
of thigh
  • patellar
obturator
femoral
  • anterior cutaneous branches
  • saphenous (infrapatellar
  • medial crural cutaneous)
sacral
plexus
(L4–S4)
sciatic
common
fibular
  • lateral sural cutaneous (sural communicating branch)
  • deep fibular (lateral terminal branch
  • medial terminal branch
  • dorsal digital)
  • superficial fibular (medial dorsal cutaneous
  • intermediate dorsal cutaneous
  • dorsal digital)
tibial
  • medial sural cutaneous
  • medial calcaneal
  • medial plantar (common plantar digital nerves
  • proper plantar digital)
  • lateral plantar (deep branch
  • superficial branch
  • common plantar digital
  • proper plantar digital)
sural
  • lateral dorsal cutaneous
  • lateral calcaneal
other
  • muscular: superior gluteal/inferior gluteal
  • lateral rotator group (to quadratus femoris
  • to obturator internus
  • to the piriformis)
    cutaneous: posterior cutaneous of thigh (inferior cluneal
  • perineal branches)
  • perforating cutaneous
coccygeal
plexus
(S4–Co)
  • pudendal: inferior anal
  • perineal (deep
  • posterior scrotal ♂/labial ♀)
  • dorsal of the penis ♂/clitoris ♀
    anococcygeal
  • cutaneous innervation of the lower limbs

M: PNS

anat (h/r/t/c/b/l/s/a)/phys (r)/devp/prot/nttr/nttm/ntrp

noco/auto/cong/tumr, sysi/epon, injr

proc, drug (N1B)

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