WordNet

any bundle of nerve fibers running to various organs and tissues of the body (同)nervus
control of your emotions; "this kind of tension is not good for my nerves"

PrepTutorEJDIC

〈C〉『神経』 / 〈C〉《複数形で》『神経過敏』,いらだち / 〈U〉『勇気』,度胸(courage) / 〈U〉《時にa ~》厚かましさ,ずぶとさ;無礼 / 〈C〉葉脈;(昆虫の)翅脈(しみゃく) / 〈人,特に自分〉‘に'力を与える,‘を'元気づける

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/06/28 16:18:37」(JST)

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The ilioinguinal nerve is a branch of the first lumbar nerve (L1). It separates from the first lumbar nerve along with the larger iliohypogastric nerve.

It emerges from the lateral border of the psoas major just inferior to the iliohypogastric, and passes obliquely across the quadratus lumborum and iliacus. The ilioinguinal nerve then perforates the transversus abdominis near the anterior part of the iliac crest, and communicates with the iliohypogastric nerve between the transversus and the internal oblique muscle.

It then pierces the internal oblique muscle, distributing filaments to it, and then accompanies the spermatic cord through the superficial inguinal ring. Its fibers are then 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 penis and upper part of the scrotum.
In the female ("anterior labial nerve"): to the skin covering the mons pubis and 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.

Variations

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.

Additional images

Deep and superficial dissection of the lumbar plexus.
Cutaneous nerves of the right lower extremity. Front and posterior views.
Cutaneous nerves of the right lower extremity. Front and posterior views.

References

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links

Ilioinguinal_nerve at the Duke University Health System's Orthopedics program
Atlas image: abdo_wall70 at the University of Michigan Health System - "Posterior abdominal wall, dissection, anterior view"
Anatomy photo:35:05-0102 at the SUNY Downstate Medical Center - "Anterior Abdominal Wall: The Iliohypogastric and IlioInguinal Nerves"
Anatomy photo:40:17-0102 at the SUNY Downstate Medical Center - "Posterior Abdominal Wall: Nerves of the Lumbar Plexus"
Anatomy image:7433 at the SUNY Downstate Medical Center
posteriorabdomen at The Anatomy Lesson by Wesley Norman (Georgetown University) (posteriorabdmus&nerves)

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1. ヘルニア修復術後の持続的な脚の付け根の痛みおよびヘルニア後の神経痛 persistent groin pain following hernia repair and post herniorrhaphy neuralgia
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3. 末梢神経ブロック：手技 peripheral nerve block techniques
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5. Approach to hip and groin pain in the athlete and active adult

English Journal

Does nerve identification during open inguinal herniorrhaphy reduce the risk of nerve damage and persistent pain?

Bischoff JM, Aasvang EK, Kehlet H, Werner MU.SourceSection of Surgical Pathophysiology 4074, Rigshospitalet, Copenhagen University, Blegdamsvej 9, 2100, Copenhagen, Denmark, jomutahi@hotmail.com.
Hernia : the journal of hernias and abdominal wall surgery.Hernia.2012 Jul 11. [Epub ahead of print]
PURPOSE: Nerve identification during open inguinal hernia herniorrhaphy has been suggested as one of the factors that may reduce the risk of development of persistent postherniorrhaphy pain. In this prospective study, we evaluated whether intraoperative inguinal nerve identification influenced the r
PMID 22782363

Abdominal wall nerve injury during laparoscopic gynecologic surgery: incidence, risk factors, and treatment outcomes.

Shin JH, Howard FM.SourceDepartment of Obstetrics and Gynecology, University of Rochester School of Medicine and Dentistry, Rochester, New York.
Journal of minimally invasive gynecology.J Minim Invasive Gynecol.2012 Jul;19(4):448-53. Epub 2012 May 3.
STUDY OBJECTIVE: To determine the incidence and clinical significance of iliohypogastric-ilioinguinal neuropathy from lower abdominal lateral port placement and fascial closure during laparoscopic gynecologic surgery.DESIGN: Retrospective cohort study (Canadian Task Force classification II-2).SETTIN
PMID 22560041

Japanese Journal

超音波ガイド下ブロックの現状と今後の領域 : 下腹部手術に利用する腹壁神経ブロック

北山眞任,廣田和美,佐藤裕
日本臨床麻酔学会誌 = The Journal of Japan Society for Clinical Anesthesia 30(7), 967-973, 2010-11-15
NAID 10027752682

成人鼠径ヘルニア術後慢性疼痛に対する予防的腸骨鼠径神経摘出

成田匡大,岡本正吾,小柴孝友,山神和彦,坂野茂,山本正之
日本消化器外科学会雑誌 41(10), 1765-1774, 2008-10-01
背景:鼠径ヘルニア術後の慢性疼痛は保存的治療に抵抗性で再手術を余儀なくされる場合が多く,その予防法の確立が重要である.我々の施設では術後慢性疼痛を予防すべく,2004年3月から予防的腸骨鼠径神経摘出を行っている.これらの術後慢性疼痛発症率について,神経を温存していた従来の方法と比較検討した.方法:2003年1月から2005年3月までに当院で局所麻酔下にPROLENE Hernia Systemにて …
NAID 110006980009

「腸骨鼡径神経」

Ilioinguinal nerve
	Plan of the lumbar plexus. The ilioinguinal is visible at the upper left.
	The lumbar plexus and its branches. The ilioinguinal nerve is visible at the upper left.
Details
Latin	nervus ilioinguinalis
From	lumbar plexus
Innervates	Skin over the root of the penis and upper part of the scrotum (male), skin covering the mons pubis and labium majus (female)
Identifiers
Gray's	p.952
Dorlands; /Elsevier	n_05/12565896
TA	A14.2.07.006
FMA	16483
	Anatomical terms of neuroanatomy