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|Nerve: Iliohypogastric nerve|
|Plan of lumbar plexus. (Iliohypogastric visible at upper left.)|
|The lumbar plexus and its branches. (Iliohypogastric visible at upper left.)|
|Gray's||subject #212 950|
The Iliohypogastric Nerve is the superior branch of the anterior ramus of spinal nerve L1 (one of the lumbar nerves) after this nerve receives fibers from T12(subcostal nerve). The inferior branch is the ilioinguinal nerve.
It emerges from the upper part of the lateral border of the Psoas major, and crosses obliquely in front of the Quadratus lumborum to the iliac crest.
It then perforates the posterior part of the Transversus abdominis, near the crest of the ilium, and divides between that muscle and the Obliquus internus abdominis into a lateral and an anterior cutaneous branch.
lateral cutaneous branch
The lateral cutaneous branch (ramus cutaneus lateralis; 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.
anterior cutaneous branch
The anterior cutaneous branch (ramus cutaneus anterior; hypogastric branch) continues onward between the Obliquus internus and Transversus.
It then pierces the Obliquus internus, becomes cutaneous by perforating the aponeurosis of the Obliquus externus about 2.5 cm. above the subcutaneous inguinal ring, and is distributed to the skin of the hypogastric region.
- Duke Orthopedics iliohypogastric_nerve
- Atlas of anatomy at UMich abdo_wall70 - "Posterior Abdominal Wall, Dissection, Anterior View"
- SUNY Labs 35:05-0101 - "Anterior Abdominal Wall: The Iliohypogastric and IlioInguinal Nerves"
- SUNY Labs 40:17-0101 - "Posterior Abdominal Wall: Nerves of the Lumbar Plexus"
- State University of New York (SUNY) Anatomy Image 7055
- State University of New York (SUNY) Anatomy Image 7221
- State University of New York (SUNY) Anatomy Image 7257
- Memorial University of Newfoundland - Anatomy at MUN nerve/lumbnerv
- Norman/Georgetown posteriorabdomen (posteriorabdmus&nerves)
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
lumbar plexus: iliohypogastric - ilioinguinal - genitofemoral (femoral branch/lumboinguinal, genital branch) - lateral cutaneous of thigh (patellar) - obturator (anterior, cutaneous, posterior, accessory) - femoral (anterior cutaneous branches, saphenous)
sacral/coccygeal plexus: to quadratus femoris - to obturator internus - to the piriformis - superior gluteal - inferior gluteal - posterior cutaneous of thigh (inferior cluneal, perineal branches)
sciatic: tibial (medial sural cutaneous, sural, medial calcaneal, medial plantar, lateral plantar) - common fibular (lateral sural cutaneous, deep fibular, superficial fibular, medial dorsal cutaneous, intermediate dorsal cutaneous)
- de:Nervus iliohypogastricus
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