medial 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. dividing an animal into right and left halves (同)median

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. 中間の,中間に位置する / 平均の,並なみの
3. mediumの複数形
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）』「2015/12/02 21:12:24」(JST)

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Medial pterygoid
The Pterygoidei; the zygomatic arch and a portion of the ramus of the mandible have been removed. (Internus is visible at center bottom.)
The otic ganglion and its branches. (Pterygoideus internus labeled at bottom right.)
Details
Latin	musculus pterygoideus medialis, musculus pterygoideus internus
Origin	deep head: medial side of lateral pterygoid plate behind the upper teeth superficial head: pyramidal process of palatine bone and maxillary tuberosity
Insertion	medial angle of the mandible
Artery	pterygoid branches of maxillary artery
Nerve	mandibular nerve via nerve to medial pterygoid
Actions	elevates mandible, closes jaw, helps lateral pterygoids in moving the jaw from side to side
Identifiers
Gray's	p.387
MeSH	A02.633.567.600.700
Dorlands /Elsevier	m_22/12550302
TA	A04.1.04.009
FMA	49011
Anatomical terms of muscle

The medial pterygoid (or internal pterygoid muscle), is a thick, quadrilateral muscle of mastication.

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

Structure

It consists of two heads.

• The bulk of the muscle arises as a deep head from just above the medial surface of the lateral pterygoid plate.
• The smaller, superficial head originates from the maxillary tuberosity and the pyramidal process of the palatine bone.

Its fibers pass downward, lateral, and posterior, and are inserted, by a strong tendinous lamina, into the lower and back part of the medial surface of the ramus and angle of the mandible, as high as the mandibular foramen. The insertion joins the masseter muscle to form a common tendinous sling which allows the medial pterygoid and masseter to be powerful elevators of the jaw.

Innervation

Unlike the lateral pterygoid and all other muscles of mastication which are innervated by the anterior division of the mandibular branch of the trigeminal nerve, the medial pterygoid is innervated by the main trunk of the mandibular branch of the trigeminal nerve (V), before the division.

Function

Given that the origin is on the medial side of the lateral pterygoid plate and the insertion is from the internal surface of the ramus of the mandible down to the angle of the mandible, its functions include:

• Elevation of the mandible (closes the jaw)
• Minor contribution to protrusion of the mandible
• Assistance in mastication
• Excursion of the mandible; contralateral excursion occurs with unilateral contraction.

Additional images

• Position of medial pterygoid muscle (red).

• Left palatine bone. Posterior aspect. Enlarged.

• Mandible. Inner surface. Side view.

• Plan of branches of internal maxillary artery.

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

• Mandibular division of trifacial nerve, seen from the middle line.

• Muscles of the pharynx, viewed from behind, together with the associated vessels and nerves.

• PTERYGOID MEDIAL MUSCLEDeep dissection.Anterior view.

Dissection images
Medial pterygoid muscle Medial pterygoid muscle Medial pterygoid muscle Medial pterygoid muscle Medial pterygoid muscle Infratemporal fossa. Lingual and inferior alveolar nerve. Deep dissection. Anterolateral view

References

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

External links

• -1483079600 at GPnotebook
• MedicalMnemonics.com: 70
• Anatomy diagram: 25420.000-1 at Roche Lexicon - illustrated navigator, Elsevier

UpToDate Contents

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English Journal

• Deep fat of the face revisited.

• Cho KH, Lee HS, Katori Y, Rodríguez-Vázquez JF, Murakami G, Abe SI.SourceDepartment of Neurology, Institute of Wonkwang Medical Science, Wonkwang University School of Medicine, Jeonbuk CardioCerebro Vascular Disease Center, Iksan, Korea. neurlogy@wonkwang.ac.kr, neuro200@hanmail.net.
• Clinical anatomy (New York, N.Y.).Clin Anat.2012 Dec 17. doi: 10.1002/ca.22206. [Epub ahead of print]
• The midfacial deep fatty tissue has been divided into the buccal and parapharyngeal fat pads although the former carries several extensions in adults. Using histological sections of 15 large human fetuses, we demonstrated that the parapharyngeal fat pad corresponds to the major content of the presty
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• Prestyloid compartment of the parapharyngeal space: a histological study using late-stage human fetuses.

• Katori Y, Kawase T, Cho KH, Abe H, Rodríguez-Vázquez JF, Murakami G, Abe S.SourceDivision of Otorhinolaryngology, Sendai Municipal Hospital, Sendai, Japan, entsendai@yahoo.co.jp.
• Surgical and radiologic anatomy : SRA.Surg Radiol Anat.2012 Dec;34(10):909-20. doi: 10.1007/s00276-012-0975-2. Epub 2012 May 11.
• PURPOSE: Although the prestyloid space is well known, its definition still remains unclear.METHODS: Using semiserial sagittal sections of 15 late-stage human fetal heads, we studied details of the topographical anatomy.RESULTS: A definite posterior marginal fascia of the space was seen along the ant
• PMID 22576264

Japanese Journal

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• 倉富 勇一郎,佐藤 慎太郎,鈴木 久美子,門司 幹男,井之口 昭
• 頭頸部癌 = Head and neck cancer 38(1), 26-32, 2012-04-25
• NAID 10030815740

• 顎矯正手術における超音波診断法と単純ＣＴ画像を用いた顎動脈の走行位置評価

• 児玉 泰光,林 孝文,嵐山 貴徳,田中 礼,福田 純一,高木 律男
• 日本顎変形症学会雑誌 21(4), 232-237, 2011
• … Each unenhanced CT image of the IMA location was categorized referring to the ultrasonographic image as predictable or unpredictable.In addition, each predictable image was subclassified as lateral (located external to the lateral pterygoid muscle) or medial (other than the former).[Results] The ultrasonography had 24 (80.0%) IMAs classified as clear and 6 (20.0%) as unclear. …
• NAID 130001922237

Related Links

• medial pterygoid muscle - definition of medial pterygoid ...

medial pterygoid muscle n. A muscle with origin from the pterygoid fossa of the sphenoid bone and the tuberosity of the maxilla, with insertion into the medial surface of the mandible, with nerve supply from the medial pterygoid branch ...

• pterygoid muscle, medial - definition of pterygoid muscle ...

muscle /mus·cle/ (mus´'l) an organ which by contraction produces movement of an animal organism. abductor muscle of great toe origin, medial tubercle of calcaneus, plantar fascia; insertion, medial surface of base of proximal ...

Related Pictures

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★リンクテーブル★

リンク元	「内側翼突筋」
関連記事	「medial」「media」「pterygoid」「muscle」

「内側翼突筋」

　　[★]

英

medial pterygoid (M,K), medial pterygoid muscle

ラ

musculus pterygoideus medialis

関

咀嚼筋、咀嚼筋群

起始

• 蝶形骨(翼突窩)と上顎骨(上顎結節)

停止

• 下顎骨(下顎枝)

神経

• 下顎神経(三叉神経の下顎枝)

機能

• 下顎を挙上、あごを閉じる。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

「medial」

　　[★]

• adj.

• 内側の、中心の、中央の、内側性の

関

center、central、centre、centro、centrum、hub、inner、inside、interior、medialis、medially、middle

　 　

「media」

　　[★]

• n.

関

culture、culture media、culture medium、culture solution、medium

　

「pterygoid」

　　[★]

• adj.

• 翼状の

関

winged

「muscle」

　　[★]

• n.

• 筋肉