Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/10/14 17:10:50」(JST)

wiki en

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 extremity (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

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 中間神経（膝状節）神経痛 nervus intermedius geniculate neuralgia
2. 頭蓋顔面痛の概要 overview of craniofacial pain
3. ベル麻痺：成人における病因、臨床的特徴、および診断 bells palsy pathogenesis clinical features and diagnosis in adults
4. 群発頭痛：急性および予防的治療 cluster headache acute and preventive treatment
5. 小児における顔面神経麻痺 facial nerve palsy in children

English Journal

TVT ABBREVO: cadaveric study of tape position in foramen obturatum and adductor region.

Hubka P1, Nanka O2, Masata J1, Martan A1, Svabik K3.
International urogynecology journal.Int Urogynecol J.2016 Jan 11. [Epub ahead of print]
INTRODUCTION AND HYPOTHESIS: The aim of the study was to describe fixation of the TVT ABBREVO and establish whether the tape penetrates through obturator muscles and membrane (obturator complex) into the adductor region and, if so, how far it penetrates.METHODS: Eight formalin-embalmed female cadave
PMID 26755054

Bipolar Versus Monopolar Transurethral Resection of Nonmuscle-Invasive Bladder Cancer: A Meta-Analysis.

Zhao C1,2, Tang K1,2, Yang H1,2, Xia D1,2, Chen Z1,2.
Journal of endourology / Endourological Society.J Endourol.2016 Jan;30(1):5-12. doi: 10.1089/end.2015.0410. Epub 2015 Oct 8.
BACKGROUND AND PURPOSE: Bipolar energy has recently been used as a common alternative to conventional monopolar transurethral resection of the bladder (TURB) while managing nonmuscle-invasive bladder cancer (NMIBC). We established a meta-analysis comparing the safety and efficacy of plasmakinetic bi
PMID 26413779

Rare cause of paraparesis: bilateral obturator neuropathy after hysterosalpingectomy.

López-Blanco R1, Mejía-Jiménez I2, de Fuenmayor-Fernández de la Hoz CP3, Ruiz-Morales J3.
BMJ case reports.BMJ Case Rep.2015 Dec 21;2015. pii: bcr2015212660. doi: 10.1136/bcr-2015-212660.
Bilateral obturator nerve injury during pelvic surgery is an infrequent cause of lower limb paraparesis. We report the case of a 45-year-old woman with a large uterine leiomyoma who underwent simple total hysterectomy and bilateral salpingectomy. At 24 h after the surgery, the patient noticed loss
PMID 26689250

★リンクテーブル★

リンク元	「閉鎖神経」
関連記事	「nervus」

「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
TA	A14.2.07.012
FMA	16487
	Anatomical terms of neuroanatomy [edit on Wikidata]