- Ilioinguinal nerve
Name = PAGENAME
Latin = nervus ilioinguinalis
GraySubject = 212
GrayPage = 952
Caption = Plan of the
lumbar plexus. The ilioinguinal is visible at the upper left.
Caption2 = The
lumbar plexusand its branches. The ilioinguinal nerve is visible at the upper left.
Innervates = Skin over the root of the
penisand upper part of the scrotum(male), skin covering the mons pubisand labium majus| (female) BranchFrom = lumbar plexus
DorlandsPre = n_05
DorlandsSuf = 12565896
The ilioinguinal nerve, smaller than the
iliohypogastric nerve, arises with it from the first lumbar nerve.
It emerges from the lateral border of the
psoas majorjust below the iliohypogastric, and, passing obliquely across the quadratus lumborumand iliacus, perforates the transversus abdominis, near the anterior part of the iliac crest, and communicates with the iliohypogastric nerve between the transversus and the obliquus internus.
The nerve then pierces the obliquus internus, distributing filaments to it, and, accompanying the
spermatic cordthrough the superficial inguinal ring, is distributed to the skin of the upper and medial part of the thigh, and to the following locations in the male and female:
* In the male ("
anterior scrotal nerve"): to the skin over the root of the penisand upper part of the scrotum.
* In the female ("
anterior labial nerve"): to the skin covering the mons pubisand labium majus.
Note that the ilioinguinal nerve does not pass through the
deep inguinal ring, and therefore it only travels through part of the inguinal canal.
The size of this nerve is in inverse proportion to that of the iliohypogastric.
Occasionally it is very small, and ends by joining the iliohypogastric; in such cases, a branch from the iliohypogastric takes the place of the ilioinguinal, or the latter nerve may be altogether absent.
* - "Posterior abdominal wall, dissection, anterior view"
* - "Anterior Abdominal Wall: The Iliohypogastric and IlioInguinal Nerves"
* - "Posterior Abdominal Wall: Nerves of the Lumbar Plexus"
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