Iliohypogastric nerve

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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.)
Latin	n. iliohypogastricus
Gray's	subject #212 950
Innervates
From	lumbar plexus
To
MeSH	{{{MeshNumber}}}

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.

communication[]

The iliohypogastric nerve communicates with the subcostal nerve and ilioinguinal nerves.

Additional images[]

External links[]

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.

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Nerves of lower limbs and lower torso: the lumbosacral plexus

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)