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"

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〈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）』「2022/11/13 13:31:36」(JST)

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The genitofemoral nerve refers to a nerve that is found in the abdomen. Its branches, the genital branch and femoral branch supply sensation to the upper anterior thigh, as well as the skin of the anterior scrotum in males and mons pubis in females. The femoral branch is different from the femoral nerve, which also arises from the lumbar plexus.

Anatomy

The genitofemoral nerve originates from the upper L1-2 segments of the lumbar plexus. It passes downwards, pierces the psoas major and emerges from its anterior surface. The nerve divides into two branches, the genital branch and the lumboinguinal nerve also known as the femoral branch,^[1] both of which then continue downwards and medially to the inguinal and femoral canal respectively.

Genital Branch

The genital branch passes through the deep inguinal ring and enters the inguinal canal. In men, the genital branch supplies the cremaster and scrotal skin. In women, the genital branch accompanies the round ligament of uterus, terminating in and innervating the skin of the mons pubis and labia majora.^[1]

Femoral Branch

The femoral branch passes underneath the inguinal ligament, travelling through the lateral muscular compartment of the femoral canal where it innervates skin of the upper leg. Passing through the cribriform fascia of the saphenous opening of the fascia lata of the thigh, it then supplies the skin of the upper, anterior and medial side of thigh.^[1]

Variation

The genitofemoral nerve typically pierces and passes through the psoas major muscle before bifurcating into a genital branch and a femoral branch midway along its anterior surface. In approximately 25% of cases, the genitofemoral nerve splits into these branches before it enters the psoas major or within the muscle belly of psoas major (with fibers of the psoas major separating the genital and femoral branches). Usually this variation causes the split to be occur earlier in the genitofemoral nerve, at the upper rather than mid-portion of the anterior surface of the psoas major.^[2]

Embryology

The genitofemoral nerve is formed in the midsection of the psoas muscle by the union of branches from the anterior rami of L1 and L2 nerve roots

Function

The genitofemoral nerve is responsible for both the sensory (femoral branch) and motor portions (genital branch) of the cremasteric reflex, which describes contraction of the cremasteric muscle when the skin of the superior medial part of the thigh is touched.^[1] ^: 262

Additional images

Deep and superficial dissection of the lumbar plexus.
Genitofemoral nerve

References

^ ^a ^b ^c ^d Drake, Richard L.; Vogl, Wayne; Tibbitts, Adam W.M. Mitchell; illustrations by Richard; Richardson, Paul (2005). Gray's anatomy for students (Pbk. ed.). Philadelphia: Elsevier/Churchill Livingstone. pp. 340–343. ISBN 978-0-443-06612-2.
^ Anloague, Phillip; Huijbregts, Peter (2009). "Anatomical Variations of the Lumbar Plexus: A Descriptive Anatomy Study with Proposed Clinical Implications". Journal of Manual and Manipulative Therapy. 17 (4): e107-14. doi:10.1179/106698109791352201. PMC 2813498. PMID 20140146.

External links

Anatomy photo:36:07-0305 at the SUNY Downstate Medical Center - "Inguinal Region, Scrotum and Testes: Layers of the spermatic cord"
Anatomy figure: 40:07-13 at Human Anatomy Online, SUNY Downstate Medical Center - "Muscles and nerves of the posterior abdominal wall."
posteriorabdomen at The Anatomy Lesson by Wesley Norman (Georgetown University) (posteriorabdmus&nerves)

UpToDate Contents

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1. 骨盤手術に関連する神経損傷 nerve injury associated with pelvic surgery
2. 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
3. 広汎子宮全摘出術 radical hysterectomy

English Journal

Regression of the Mammary Branch of the Genitofemoral Nerve May be Necessary for Testicular Descent in Rats.

Su S, Farmer PJ, Li R, Sourial M, Buraundi S, Bodemer D, Southwell BR, Hutson JM.SourceDepartment of Pediatrics, University of Melbourne, Parkville, Victoria, Australia.
The Journal of urology.J Urol.2012 Oct;188(4 Suppl):1443-9. Epub 2012 Aug 17.
PURPOSE: Inguinoscrotal testicular descent has been proposed to occur via sensory fibers of the sexually dimorphic genitofemoral nerve, which release a neurotransmitter, calcitonin gene related peptide, to guide the migrating gubernaculum into the scrotum. We hypothesize that androgen mediated regre
PMID 22906642

Comment on: The genitofemoral nerve block: a method for hemiscrotal anaesthesia at the bedside.

Stringer MD.SourceOtago School of Medical Sciences, University of Otago, Dunedin, New Zealand mark.stringer@anatomy.otago.ac.nz.
Annals of the Royal College of Surgeons of England.Ann R Coll Surg Engl.2012 Sep;94(6):453.
PMID 22943359

Japanese Journal

精巣下降の分子生物学 (第56回日本泌尿器科学会中部総会"未来泌尿器科学を拓く")

生野猛
泌尿器科紀要 53(7), 505-508, 2007-07-00
… CGRP, which is released from the genitofemoral nerve, has been suggested to mediate the inguinoscrotal testicular descent. …
NAID 120001177881

An Anatomic Study of the Lumbar Plexus with Respect to Retroperitoneal Endoscopic Surgery

MORO Takatomo,KIKUCHI Shin-ichi,KONNO Shin-ichi,YAGINUMA Hiroyuki
Spine 28(5), 423-427, 2003-03-01
NAID 10017363001

Undescended testis is accompanied by calcitonin gene related peptide accumulation within the sensory nucleus of the genitofemoral nerve in trans-scrotal rats

HRABOVSZKY Z.
J. Urol. 165, 1015-1018, 2001
NAID 30009409712

「陰部大腿神経」

Genitofemoral nerve
Genitofemoral nerve
	Plan of lumbar plexus. (Genitofemoral nerve visible at upper left.)
	The lumbar plexus and its branches. (Genitofemoral nerve visible at upper left.)
Details
From	lumbar plexus
To	lumboinguinal, genital branch
Innervates	cremaster muscle Anterior scrotum in males Mons pubis in females
Identifiers
Latin	Nervus genitofemoralis; Nervus genitalifemoralis
TA98	A14.2.07.008
TA2	6529
FMA	16484
	Anatomical terms of neuroanatomy [edit on Wikidata]

　　[★]

英: genitofemoral nerve (N)
ラ: nervus genitofemoralis
関: 腰神経叢

図：KL.208 KA.333

由来

腰神経叢
T12,L1,L2 (KL.208)
L1,L2 (N.480)

支配

陰嚢、大陰唇
大腿上部内側の皮膚

走行

大腰筋の貫いてその表面に出て、大腰筋に沿って下行 (M.181)
外腸骨動脈の外側で分岐 (M.181)
- 1本は精索(子宮円索)に沿って陰嚢(大陰唇)に分布 (KL.208)
- 1本は、外腸骨動脈に沿って下行し、鼡径靭帯の下を通り、伏在裂孔からでて(150%){大腿上部の内側部の皮膚に分布}; (KL.208)
腸骨鼡径神経と共に陰部に分布するが、N.249によれば、比較的上部or内側に分布している、らしい。
大腰筋の中で2つに分岐 (KL.208) ← ???

枝

「genital branch of genitofemoral nerve」

　　[★] 陰部大腿神経陰部枝

「nerve」

　　[★]

n.

神経

関: nervi、nervous、nervus、neural、neuro、neuron

[GRAYS2005-1] Drake, Richard L.; Vogl, Wayne; Tibbitts, Adam W.M. Mitchell; illustrations by Richard; Richardson, Paul (2005). Gray's anatomy for students (Pbk. ed.). Philadelphia: Elsevier/Churchill Livingstone. pp. 340–343. ISBN 978-0-443-06612-2.

[2] Anloague, Phillip; Huijbregts, Peter (2009). "Anatomical Variations of the Lumbar Plexus: A Descriptive Anatomy Study with Proposed Clinical Implications". Journal of Manual and Manipulative Therapy. 17 (4): e107-14. doi:10.1179/106698109791352201. PMC 2813498. PMID 20140146.

匿名

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案内

案内

genitofemoral nerve