lateral pterygoid muscle

WordNet

1. make ones way by force; "He muscled his way into the office"
2. animal tissue consisting predominantly of contractile cells (同)muscular_tissue
3. one of the contractile organs of the body (同)musculus
4. authority or power or force (especially when used in a coercive way); "the senators used their muscle to get the party leader to resign"
5. lying away from the median and sagittal plane of a body; "lateral lemniscus"
6. situated at or extending to the side; "the lateral branches of a tree"; "shot out sidelong boughs"- Tennyson (同)sidelong
7. comparative of the adverb `late; "he stayed later than you did"
8. coming at a subsequent time or stage; "without ulterior argument"; "the mood posterior to" (同)ulterior, posterior

PrepTutorEJDIC

1. 〈U〉(動物体の組織としての)『筋肉』,筋(きん);〈C〉(体の各部を動かす)筋肉 / 〈U〉力,(特に)筋力,腕力 / 《俗に》(…に)強引に割り込む《+『in on』(『into, through』)+『名』》
2. 横の,側面の;横からの / (音声が)側音の / 側面,(道路の)側溝(そっこう) / 側音(英語の[1]など)
3. 《補語にのみ用いて》(人などが)(…するのが)『もっと遅い』《+『in』+『名』(do『ing』)》 / (時刻・時期が)『もっと遅い』,もっと後の / 後で,のちほど / (lateの比較級)(定刻・予定時間・他の人(物))より遅れて,遅く
4. 筋肉の,筋力のある / 力ずくの

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/01/16 22:47:05」(JST)

wiki en

[Wiki en表示]

Lateral pterygoid muscle
The Pterygoidei; the zygomatic arch and a portion of the ramus of the mandible have been removed (labeled as "pterygoideus externus", visible in pink at center)
Sagittal section of the temporomandibular joint (labeled as "pterygoideus externus", visible in gray at bottom right)
Details
Latin	Musculus pterygoideus lateralis, musculus pterygoideus externus
Origin	Great wing of sphenoid and pterygoid plate
Insertion	Condyloid process of the mandible
Artery	Pterygoid branches of maxillary artery
Nerve	Lateral pterygoid nerve from the mandibular nerve
Actions	depresses mandible, protrude mandible, side to side movement of mandible
Identifiers
Gray's	p.386
MeSH	A02.633.567.600.700
Dorlands /Elsevier	m_22/12550292
TA	A04.1.04.006
FMA	FMA:49015
Anatomical terms of muscle

The lateral pterygoid (or external pterygoid) is a muscle of mastication with two heads. It lies superiorly to the medial pterygoid.

Origin and insertion

The upper/superior head originates on the infratemporal surface and infratemporal crest of the greater wing of the sphenoid bone, and the lower/inferior head on the lateral surface of the lateral pterygoid plate.

Inferior head inserts onto the neck of condyloid process of the mandible; upper/superior head inserts onto the articular disc and fibrous capsule of the temporomandibular joint.

Innervation

The mandibular branch of the fifth cranial nerve, the trigeminal nerve, specifically the lateral pterygoid nerve, innervates the lateral pterygoid muscle.

Function

The primary function of the lateral pterygoid muscle is to pull the head of the condyle out of the mandibular fossa along the articular eminence to protrude the mandible. A concerted effort of the lateral pterygoid muscles acts in helping lower the mandible and open the jaw whereas unilateral action of a lateral pterygoid produces contralateral excursion (a form of mastication), usually performed in concert with the medial pterygoids.

Unlike the other three muscles of mastication, the lateral pterygoid is the only muscle of mastication that assists in depressing the mandible (opening the jaw). At the beginning of this action it is assisted by the digastric, mylohyoid and geniohyoid muscles.

Additional images

• Sphenoid bone. Anterior and inferior surfaces.

• Mandible. Inner surface. Side view.

• Plan of branches of internal maxillary artery.

• Distribution of the maxillary and mandibular nerves, and the submaxillary ganglion.

External links

• -73793457 at GPnotebook
• Origin, insertion and nerve supply of the muscle at Loyola University Chicago Stritch School of Medicine
• lesson4 at The Anatomy Lesson by Wesley Norman (Georgetown University) (musclesofmastication2)
• MedicalMnemonics.com: 70
• Anatomy diagram: 25420.000-1 at Roche Lexicon - illustrated navigator, Elsevier
• Cross section at tufts.edu

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. 筋萎縮性側索硬化症およびその他の運動ニューロン疾患の臨床的特徴 clinical features of amyotrophic lateral sclerosis and other forms of motor neuron disease
• 2. 筋萎縮性側索硬化症およびその他の運動ニューロン疾患の診断 diagnosis of amyotrophic lateral sclerosis and other forms of motor neuron disease
• 3. 筋萎縮性側索硬化症の症状に基づくマネージメント symptom based management of amyotrophic lateral sclerosis
• 4. 筋力低下の評価における筋力検査 muscle examination in the evaluation of weakness
• 5. 家族性筋萎縮性側索硬化症 familial amyotrophic lateral sclerosis

English Journal

• Postero-inferior condylar movement induced by artificial occlusal interference on the balancing side during fictive mastication in rabbits.

• Morita T1, Hiraba K2, Matsunaga T2, Ito Y3, Maruo H3, Kurita K3.
• Archives of oral biology.Arch Oral Biol.2016 Jun;66:66-76. doi: 10.1016/j.archoralbio.2016.02.010. Epub 2016 Feb 22.
• OBJECTIVE: Tooth contact does not occur on the balancing side during mastication. Hence, it is possible that the presence of occlusal interference on the balancing side causes mandibular rotation followed by atypical condylar movement because the jaw-closing muscle activity on the working side is gr
• PMID 26919724

• Surgical landmarks of the nasopharyngeal internal carotid using the maxillary swing approach: A cadaveric study.

• Simon F1, Vacher C2, Herman P1, Verillaud B1.
• The Laryngoscope.Laryngoscope.2016 Apr 9. doi: 10.1002/lary.25870. [Epub ahead of print]
• OBJECTIVES/HYPOTHESIS: Surgery of the paranasopharyngeal space is very hazardous due to the position of the internal carotid artery, which is surrounded by soft tissue with few anatomical landmarks.STUDY DESIGN: Fresh cadaveric study.METHODS: In this study, we used the maxillary swing procedure to h
• PMID 27061335

• Fetal Tendinous Connection Between the Tensor Tympani and Tensor Veli Palatini Muscles: A Single Digastric Muscle Acting for Morphogenesis of the Cranial Base.

• Rodríguez-Vázquez JF1, Sakiyama K2, Abe H3, Amano O2, Murakami G4.
• Anatomical record (Hoboken, N.J. : 2007).Anat Rec (Hoboken).2016 Apr;299(4):474-83. doi: 10.1002/ar.23310. Epub 2016 Jan 27.
• Some researchers contend that in adults the tensor tympani muscle (TT) connects with the tensor veli palatini muscle (TVP) by an intermediate tendon, in disagreement with the other researchers. To resolve this controversy, we examined serial sections of 50 human embryos and fetuses at 6-17 weeks of
• PMID 26744237

Japanese Journal

• Retrospective magnetic resonance imaging study of risk factors associated with sideways disk displacement of the temporomandibular joint

• Journal of Oral Science 58(1), 29-34, 2016
• NAID 130005139536

• 上顎智歯周囲炎に起因した慢性翼突筋炎が原因と考えられた重度開口障害の1例

• 日本顎関節学会雑誌 27(2), 114-119, 2015
• NAID 130005102968

• 開口障害を伴った進行性骨化性線維異形成症の1例

• 日本口腔外科学会雑誌 61(4), 241-245, 2015
• NAID 130005102754

Related Pictures

---

★リンクテーブル★

リンク元	「外側翼突筋」
関連記事	「lateral」「pterygoid」「muscle」

「外側翼突筋」

　　[★]

英

lateral pterygoid (M,K), lateral pterygoid muscle

ラ

musculus pterygoideus lateralis

関

咀嚼筋

起始

• 上頭は蝶形骨(蝶形骨大翼)、下頭は上顎骨(翼状突起外側板の外側面)

停止

• 下顎骨(翼突筋窩)、顎関節(関節円板、関節包)

神経

• 下顎神経(三叉神経の下顎枝)

機能

• 下顎を前に突き出し、顎をあける。片側→あごを左右に(すりつぶし運動)

カテゴリ

咀嚼筋＞:咀嚼筋

「lateral」

　　[★]

• adj.

• 側面の、外側の、側の、外側性の、ラテラル

関

aspect、external、externally、flanking、laterale、lateralis、laterally、outer、outside、profile、side、sided、sidedness

　 　 　

「pterygoid」

　　[★]

• adj.

• 翼状の

関

winged

「muscle」

　　[★]

• n.

• 筋肉