WordNet

any bundle of nerve fibers running to various organs and tissues of the body (同)nervus
a prosthesis used to close an opening (as to close an opening of the hard palate in cases of cleft palate)
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

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/10/25 03:24:50」(JST)

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The obturator nerve in human anatomy arises from the ventral divisions of the second, third, and fourth lumbar nerves in the lumbar plexus; the branch from the third is the largest, while that from the second is often very small.

Path

It descends through the fibers of the psoas major, and emerges from its medial border near the brim of the pelvis; it then passes behind the common iliac arteries, and on the lateral side of the internal iliac artery and ureter, and runs along the lateral wall of the lesser pelvis, above and in front of the obturator vessels, to the upper part of the obturator foramen.

Here it enters the thigh, through the obturator canal, and divides into an anterior and a posterior branch, which are separated at first by some of the fibers of the obturator externus, and lower down by the adductor brevis.^[1]

Innervation

The obturator nerve is responsible for the sensory innervation of the skin of the medial aspect of the thigh.

The nerve is also responsible for the motor innervation of the adductor muscles of the lower limb (external obturator.^[2] adductor longus, adductor brevis, adductor magnus, gracilis) and the pectineus (inconstant). It is, notably, not responsible for the innervation of the obturator internus, despite the similarity in name.^[3]

Branches

Anterior branch of obturator nerve
Posterior branch of obturator nerve
Cutaneous branch of the obturator nerve

Additional images

Sacral plexus of the right side.
Right hip bone. Internal surface.
Left Levator ani from within.
The Obturator externus.
The arteries of the pelvis.
Variations in origin and course of obturator artery.
The relations of the femoral and abdominal inguinal rings, seen from within the abdomen. Right side.
Plan of lumbar plexus.
The lumbar plexus and its branches.
Deep and superficial dissection of the lumbar plexus.
Dissection of side wall of pelvis showing sacral and pudendal plexuses.
Obturator nerve
Obturator nerve
Lumbar and sacral plexus. Deep dissection.Anterior view.
Lumbar and sacral plexus. Deep dissection.Anterior view.
Lumbar and sacral plexus. Deep dissection.Anterior view.
Lumbar and sacral plexus. Deep dissection.Anterior view.
Lumbar and sacral plexus. Deep dissection.Anterior view.
Lumbar and sacral plexus. Deep dissection.Anterior view.
Lumbar and sacral plexus. Deep dissection.Anterior view
Lumbar and sacral plexus. Deep dissection.Anterior view

External links

Obturator_nerve at the Duke University Health System's Orthopedics program
Anatomy photo:12:st-0602 at the SUNY Downstate Medical Center
Cross section image: pelvis/pelvis-female-17—Plastination Laboratory at the Medical University of Vienna
posteriorabdomen at The Anatomy Lesson by Wesley Norman (Georgetown University) (posteriorabdmus&nerves)
cutaneous field at neuroguide.com

References

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

^ http://teachmeanatomy.info/lower-limb/nerves/obturator-nerve/
^ Moore, K.L., & Agur, A.M. (2007). Essential Clinical Anatomy: Third Edition. Baltimore: Lippincott Williams & Wilkins. 336. ISBN 978-0-7817-6274-8
^ Moore, K.L., & Agur, A.M. (2007). Essential Clinical Anatomy: Third Edition. Baltimore: Lippincott Williams & Wilkins. 345. ISBN 978-0-7817-6274-8

UpToDate Contents

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1. 下肢末梢神経症候群の概要 overview of lower extremity peripheral nerve syndromes
2. 骨盤手術に関連する神経損傷 nerve injury associated with pelvic surgery
3. 末梢神経ブロック：手技 peripheral nerve block techniques
4. 女性泌尿生殖器の外科解剖学 surgical female urogenital anatomy
5. 腰仙部神経叢症候群 lumbosacral plexus syndromes

English Journal

A case series of peripheral nerve blocks in pediatrics and young adults with skeletal dysplasia.

Eiszner JR1, Atanda A Jr2, Rangavajjula A3, Theroux M4.
Paediatric anaesthesia.Paediatr Anaesth.2016 May;26(5):553-6. doi: 10.1111/pan.12875. Epub 2016 Mar 21.
AIM: The purpose of this study was to report our experience with peripheral nerve blockade in pediatric and young adult patients with skeletal dysplasia undergoing knee arthroscopy.BACKGROUND: The incidence of skeletal dysplasia is 1 : 4000 live births. These patients have biomechanical predispositi
PMID 27000417

The Nerves of the Adductor Canal and the Innervation of the Knee: An Anatomic Study.

Burckett-St Laurant D1, Peng P, Girón Arango L, Niazi AU, Chan VW, Agur A, Perlas A.
Regional anesthesia and pain medicine.Reg Anesth Pain Med.2016 May-Jun;41(3):321-7. doi: 10.1097/AAP.0000000000000389.
BACKGROUND AND OBJECTIVES: Adductor canal block contributes to analgesia after total knee arthroplasty. However, controversy exists regarding the target nerves and the ideal site of local anesthetic administration. The aim of this cadaveric study was to identify the trajectory of all nerves that cou
PMID 27015545

Nerve injuries in total hip arthroplasty with a mini invasive anterior approach.

Macheras GA1, Christofilopoulos P2, Lepetsos P1, Leonidou AO1, Anastasopoulos PP1, Galanakos SP1.
Hip international : the journal of clinical and experimental research on hip pathology and therapy.Hip Int.2016 Apr 13:0. doi: 10.5301/hipint.5000352. [Epub ahead of print]
PURPOSE: Minimal invasive techniques in total hip arthroplasty (THA) have become increasingly popular during recent years. Despite much debate over the outcome of several minimal invasive techniques, complications arising from the use of anterior minimally invasive surgery (AMIS) for THA on a tracti
PMID 27079284

Japanese Journal

ロボット支援前立腺全摘除術における感染性骨盤内リンパ嚢腫の検証

村田大城,三田耕司,野村直史,小畠浩平,大原慎也,加藤昌生,望月英樹
泌尿器科紀要 = Acta urologica Japonica 65(1), 1-6, 2019-01
… Limited lymph node dissection was performed in the pelvic lymphoceles region surrounding the obturator nerve. …
NAID 120006578960

Incidence and Clinical Course of Limb Dysfunction Post Cardiac Catheterization　― A Systematic Review ―

Ayyaz Ul Haq Muhammad,van Leeuwen Maarten A.H.,Mamas Mamas A.,Rashid Muhammad,Gilchrist Ian C.,Bertrand Olivier,Kwok Chun Shing,Wong Chun Wai,Mansour Hossam M.,Baghdaddy Yasser,Nolan James
日本循環器學誌, 2018
… The TRA group included 15 studies with 3,616 participants and of these 3 reported nerve damage with a combined incidence of 0.16% and 4 reported sensory loss, tingling and numbness with a pooled incidence of 1.61%. … the rates of peripheral neuropathy were 0.004%, sensory neuropathy caused by local groin injury and retroperitoneal hematomas were 0.04% and 0.17%, respectively, and motor deficit caused by femoral and obturator nerve damage was 0.13%. …
NAID 130007487744

超音波ガイド下神経ブロックの進歩─腰神経叢～内転筋管ブロックと閉鎖神経ブロック─

中本達夫
日本臨床麻酔学会誌 38(2), 258-264, 2018
<p>超音波解剖学の発展によって，腰神経叢とそれに由来する大腿神経，閉鎖神経，外側大腿皮神経，およびそれらの終枝のブロックは，より多くのアプローチが可能となった．腰神経叢は，Shamrock viewにより超音波画像上で周囲の解剖を鮮明に観察して実施できる．大腿神経は内転筋管ブロックまたは縫工筋下管アプローチにより，伏在神経とそれ以外の神経の分枝への効果を調節できる．閉鎖神経はその走行 …
NAID 130006655019

「閉鎖神経」

Obturator nerve
	Structures surrounding right hip-joint. (Obturator nerve labeled at upper right.)
	Nerves of the right lower extremity. Front view.
Details
From	Lumbar plexus L2-L4
To	posterior branch of obturator nerve, anterior branch of obturator nerve
Innervates	medial compartment of thigh
Identifiers
Latin	nervus obturatorius
Dorlands; /Elsevier	n_05/12566297
TA	A14.2.07.012
FMA	16487
	Anatomical terms of neuroanatomy [edit on Wikidata]