WordNet

relating to or associated with the neck
of or relating to the cervix of the uterus; "cervical cancer"

PrepTutorEJDIC

(子宮などの)頚(けい)部の(にできた)
(次にくる語の発音が母音で始まるときに用いる) / (子音[h]で始まり第1音節に強勢のない語の場合はanを用いることがある.ただし,この場合は[h]を発音しない)

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/01/19 15:08:09」(JST)

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The ansa cervicalis (or ansa hypoglossi in older literature) is a loop of nerves that are part of the cervical plexus. It lies superficial to the internal jugular vein in the carotid triangle. Its name means "handle of the neck" in Latin.

Branches from the ansa cervicalis innervate most of the infrahyoid muscles, including the sternothyroid muscle, sternohyoid muscle, and the omohyoid muscle. Note that the thyrohyoid muscle, which is also an infrahyoid muscle, is innervated by cervical spinal nerve 1 via the hypoglossal nerve. In addition, the ansa cervicalis does not innervate the stylohyoid muscle, which is innervated by the facial nerve.

Roots

Two roots make up the ansa cervicalis.

Ansa cervicalis

Superior root of ansa cervicalis
Inferior root of ansa cervicalis

Additional images

Plan of the cervical plexus.
The right brachial plexus with its short branches, viewed from in front.
Cervical plexus
Muscles, arteries and nerves of neck.Newborn dissection.

References

"Ansa cervicalis." Stedman's Medical Dictionary, 27th ed. (2000). ISBN 0-683-40007-X
Gray's Anatomy: The Anatomical Basis of Clinical Practice. (2005). ISBN 0-443-07168-3

External links

Anatomy figure: 25:03-08 at Human Anatomy Online, SUNY Downstate Medical Center
Photo and description at Tufts University
MedicalMnemonics.com: 1042

UpToDate Contents

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English Journal

Innervation of the lower third of the sternocleidomastoid muscle by the ansa cervicalis through the C1 descendens hypoglossal branch: a previously unreported anatomical variant.

Blythe JN1, Matharu J2, Reuther WJ2, Brennan PA2.
The British journal of oral & maxillofacial surgery.Br J Oral Maxillofac Surg.2015 May;53(5):470-1. doi: 10.1016/j.bjoms.2015.01.005. Epub 2015 Mar 6.
We describe a previously unreported anatomical variant (found during a routine neck dissection) in which the lower third of the sternocleidomastoid was innervated by the C1 branch of the ansa cervicalis (descendens hypoglossi). Copyright © 2015 The British Association of Oral and Maxillofacial Surg
PMID 25747248

The "vagal ansa": a source of complication in vagus nerve stimulation.

Gopalakrishnan CV1, Kestle JR, Connolly MB.
Journal of neurosurgery. Pediatrics.J Neurosurg Pediatr.2015 May;15(5):535-8. doi: 10.3171/2014.10.PEDS14259. Epub 2015 Feb 20.
A 16-year-old boy underwent vagus nerve stimulation for treatment-resistant multifocal epilepsy. During intraoperative system diagnostics, vigorous contraction of the ipsilateral sternomastoid muscle was observed. On re-exploration, a thin nerve fiber passing from the vagus to the sternomastoid was
PMID 25700120

Aberrant innervation of the sternocleidomastoid muscle by the transverse cervical nerve: a case report.

Paraskevas G1, Lazaridis N2, Spyridakis I3, Koutsouflianiotis K4, Kitsoulis P5.
Journal of clinical and diagnostic research : JCDR.J Clin Diagn Res.2015 Apr;9(4):AD01-2. doi: 10.7860/JCDR/2015/11787.5757. Epub 2015 Apr 1.
Two aberrant rami originating from the right transverse cervical nerve and innervated the midportion of the sternocleidomastoid muscle (SM) were detected during routine cadaver dissection. Although SM is commonly innervated by the accessory nerve, as well as by cervical nerves, it is likely to be in
PMID 26023545

Japanese Journal

陳旧性一側喉頭麻痺に対する披裂軟骨内転術と神経移行術の併用術の経時的効果

兒玉成博,讃岐徹治,湯本英二
音声言語医学 54(1), 8-13, 2013
一側喉頭麻痺の嗄声に対する外科的治療には，甲状軟骨形成術I型，声帯内注入術，披裂軟骨内転術，神経再建術がある．今回，陳旧性一側喉頭麻痺に対し，披裂軟骨内転術に併用して神経移行術を行った症例の術後発声機能を経時的に検討した．検討項目は，声帯振動の規則性，振幅，声門間隙，空気力学的検査（MPT，MFR），聴覚心理的評価のGRBAS尺度（G，B）である．検討は，術前および術後1，3，6，12，24ヵ月と …
NAID 130003373824

披裂軟骨内転術と併用術式の発声機能評価

兒玉成博,讃岐徹治,東家完,湯本英二
音声言語医学 52(2), 149-157, 2011-04-20
… 今回, 内転術を単独で行った症例 (内転群) , 内転術に甲状軟骨形成術I型 (以下, I型) を加えた症例 (内転+I型群) , 内転術に頸神経ワナ－反回神経吻合術 (以下, Ansa吻合術) を加えた症例 (内転+Ansa吻合群) について治療前後の発声機能を, 空気力学的検査, 音響分析, 声域を用いて検討した. … 内転+I型群, 内転+Ansa吻合群でMPT, MFR, Jitter, HNRが正常域まで改善した. …
NAID 10028169964

反回神経切除症例に対する音声再建の有用性 : 音声再建群と非再建群との音声機能の比較

千々和秀記,千年俊一,梅野博仁 [他],上田祥久,中島格
日本耳鼻咽喉科學會會報 112(3), 116-121, 2009-03-20
当科の反回神経切除症例に対する音声再建のアルゴリズムは, 神経即時再建を第一選択とし, 即時再建ができない場合には, 主として脂肪注入を二次的に行っている. 今回これら再建症例の音声機能検査を経時的に行い, 発声機能を客観的に評価することで, 音声再建方法の妥当性を検討した.2001年～2007年に久留米大学病院耳鼻咽喉科および関連病院で甲状腺癌反回神経浸潤症例に対し, 反回神経合併切除を行った3 …
NAID 10026279246

「頚神経ワナ」

Ansa cervicalis
	Ansa cervicalis. Superior root labeled as "descending hypoglossal", Inferior root labeled as "descending cervical".
Details
Latin	Ansa cervicalis, ansa hypoglossi
Innervates	sternohyoid muscle, sternothyroid muscle, omohyoid muscle
Identifiers
Gray's	p.928
Dorlands; /Elsevier	a_44/12138601
TA	A14.2.02.013
FMA	55142
	Anatomical terms of neuroanatomy