内側翼突筋
WordNet
- dividing an animal into right and left halves (同)median
PrepTutorEJDIC
- 中間の,中間に位置する / 平均の,並なみの
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/11/28 16:57:05」(JST)
[Wiki en表示]
| Medial pterygoid |
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| The Pterygoidei; the zygomatic arch and a portion of the ramus of the mandible have been removed. (Internus is visible at center bottom.) |
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| The otic ganglion and its branches. (Pterygoideus internus labeled at bottom right.) |
| Latin |
musculus pterygoideus medialis, musculus pterygoideus internus |
| Gray's |
subject #109 387 |
| 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 |
| MeSH |
Pterygoid+Muscles |
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.
Contents
- 1 Origin and insertion
- 2 Innervation
- 3 Actions
- 4 Additional images
- 5 External links
Origin and insertion[edit]
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[edit]
Like the lateral pterygoid, and all other muscles of mastication the medial pterygoid is innervated by the anterior root (motor root) of the mandibular branch of the trigeminal nerve (V).
Actions[edit]
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[edit]
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Position of medial pterygoid muscle (red).
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Left palatine bone. Posterior aspect. Enlarged.
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Mandible. Inner surface. Side view.
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Plan of branches of internal maxillary artery.
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Distribution of the maxillary and mandibular nerves, and the submaxillary ganglion.
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Mandibular division of trifacial nerve, seen from the middle line.
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Muscles of the pharynx, viewed from behind, together with the associated vessels and nerves.
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PTERYGOID MEDIAL MUSCLEDeep dissection.Anterior view.
| Dissection images |
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Infratemporal fossa. Lingual and inferior alveolar nerve. Deep dissection. Anterolateral view
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External links[edit]
- LUC mpte
- -1483079600 at GPnotebook
- Mnemonic at medicalmnemonics.com 70
- Roche Lexicon - illustrated navigator, at Elsevier 25420.000-1
This article incorporates text from a public domain edition of Gray's Anatomy.
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List of muscles of head and neck: the head (TA A04.1, GA 4.378)
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| Extraocular (CN III, IV, VI) |
oblique (inferior, superior) · rectus (superior, inferior, medial, lateral) · levator palpebrae superioris (superior tarsal)
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| Mastication (CN V3) |
masseter · temporalis (sphenomandibularis) · pterygoid (lateral, medial)
fascia: Masseteric fascia · Temporal fascia · Deep portion: cementomaxillary tendon · Superficial portion: cementomandibular tendon
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| Facial (CN VII) |
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Ear
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auricular (anterior, superior, posterior) · temporoparietalis
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Scalp/eyelid
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occipitofrontalis (occipitalis, frontalis) · orbicularis oculi (depressor supercilii) · corrugator supercilii
fascia: Galea aponeurotica
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Nose
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procerus · nasalis (dilatator naris) · depressor septi nasi · levator labii superioris alaeque nasi
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Mouth
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levator anguli oris · levator labii superioris · zygomaticus (major, minor)
orbicularis oris · risorius · buccinator
depressor anguli oris · depressor labii inferioris · mentalis
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Palate/fauces (CN IX, X, XI)
(except TVP=V3) |
veli palatini (tensor, levator) · musculus uvulae · palatopharyngeus (to pharynx) · palatoglossus (to tongue)
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| Tongue (CN XII) |
extrinsic (genioglossus, hyoglossus/chondroglossus, styloglossus, and palatoglossus [CN X]) · intrinsic (superior longitudinal, inferior longitudinal, transverse, vertical)
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anat (h/n, u, t/d, a/p, l)/phys/devp/hist
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noco (m, s, c)/cong (d)/tumr, sysi/epon, injr
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Also it elevates mandible.
UpToDate Contents
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English Journal
- Treatment of displaced mandibular condylar fracture with botulinum toxin A.
- Akbay E1, Cevik C2, Damlar I3, Altan A3.
- Auris, nasus, larynx.Auris Nasus Larynx.2014 Apr;41(2):219-21. doi: 10.1016/j.anl.2013.08.002. Epub 2013 Oct 21.
- The aim of this case report is to discuss the effect on condylar reduction of botulinum toxin A treatment used in a child with displaced fracture at condylar neck of mandible. A 3-years old boy was admitted to our clinic for incomplete fracture of mandibular symphysis and displaced condylar fracture
- PMID 24156980
- New insights into dinosaur jaw muscle anatomy.
- Holliday CM1.
- Anatomical record (Hoboken, N.J. : 2007).Anat Rec (Hoboken).2009 Sep;292(9):1246-65. doi: 10.1002/ar.20982.
- Jaw muscles are key components of the head and critical to testing hypotheses of soft-tissue homology, skull function, and evolution. Dinosaurs evolved an extraordinary diversity of cranial forms adapted to a variety of feeding behaviors. However, disparate evolutionary transformations in head shape
- PMID 19711458
- [Exsudativ proliferative synovialitis of the temporomandibular joint].
- Markwardt J1, Klemm E, Aust D, Lauer G.
- Laryngo- rhino- otologie.Laryngorhinootologie.2007 Oct;86(10):728-31.
- A 39-year-old male patient suffered from pain in the right temporo-mandibular-joint (TMJ) region for more than one year particular when chewing. He was suspected of having a parotis gland tumor and was admitted to the ENT Department. Three months prior to admission there was an increasing swelling.
- PMID 17907096
Japanese Journal
- オトガイ部知覚異常を初発症状とした側頭下窩に進展した筋肉内脂肪腫の1例
- 福井 康人,虎谷 茂昭,小泉 浩一 [他],松本 真司,林堂 安貴,岡本 哲治
- 日本口腔外科学会雑誌 55(11), 580-584, 2009-11-20
- … We describe a case of intramuscular lipoma occurring in the musculus pterygoideus medialis or lateralis that spread to the infratemporal fossa in association with mental nerve neuropathy in a 59-year-old man. …
- NAID 10027091398
Related Links
- Looking for online definition of musculus pterygoideus medialis in the Medical Dictionary? musculus pterygoideus medialis explanation free. What is musculus pterygoideus medialis? Meaning of musculus pterygoideus medialis ...
- Musculus pterygoideus medialis information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues. ... Introduction: Musculus pterygoideus medialis Description of Musculus ...
★リンクテーブル★
[★]
- 英
- medial pterygoid (M,K), medial pterygoid muscle
- ラ
- musculus pterygoideus medialis
- 関
- 咀嚼筋、咀嚼筋群
神経
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
[★]
- 英
- masticatory muscle, the muscle of mastication
- 同
- 咬合筋 muscle of occlusion, occluding muscles
- 関
- 咀嚼、咀嚼筋群
咀嚼筋
神経
[★]
- 関
- center、central、centre、centro、centrum、hub、inner、inside、interior、medialis、medially、middle
[★]
- 関
- inner、inside、interior、medial、medially