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Iliohypogastric nerve

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Nerve: Iliohypogastric nerve
Gray822
Plan of lumbar plexus. (Iliohypogastric visible at upper left.)
Gray823
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 branchEdit

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 branchEdit

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.

communicationEdit

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

Additional imagesEdit

External linksEdit

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 As such, some of the information contained herein may be outdated.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.

de:Nervus iliohypogastricus
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