外側翼突筋
WordNet
- lying away from the median and sagittal plane of a body; "lateral lemniscus"
- situated at or extending to the side; "the lateral branches of a tree"; "shot out sidelong boughs"- Tennyson (同)sidelong
- comparative of the adverb `late; "he stayed later than you did"
- coming at a subsequent time or stage; "without ulterior argument"; "the mood posterior to" (同)ulterior, posterior
PrepTutorEJDIC
- 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)
- 《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
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2015/09/14 22:52:10」(JST)
[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)
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Sagittal section of the temporomandibular joint (labeled as "pterygoideus externus", visible in gray at bottom right)
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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 |
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.
Contents
- 1 Origin and insertion
- 2 Innervation
- 3 Function
- 4 Additional images
- 5 External links
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
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Sphenoid bone. Anterior and inferior surfaces.
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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.
External links
- -73793457 at GPnotebook
- 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
Muscles of the head
|
|
Extraocular |
- Oblique
- Rectus
- superior
- inferior
- medial
- lateral
- Levator palpebrae superioris
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Masticatory |
- Masseter
- Temporalis
- Pterygoid
- Fascia
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|
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Facial |
Ear |
- Auricular
- anterior
- superior
- posterior
- Temporoparietalis
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|
Scalp/eyelid |
- Occipitofrontalis
- Orbicularis oculi
- Corrugator supercilii
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|
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Nose |
- Procerus
- Nasalis
- Depressor septi nasi
- Levator labii superioris alaeque nasi
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|
Mouth |
- Levator anguli oris
- Levator labii superioris
- Zygomaticus
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|
- Orbicularis oris
- Risorius
- Buccinator
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|
- Depressor anguli oris
- Depressor labii inferioris
- Mentalis
- Transversus menti
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|
|
|
Soft palate |
- Veli palatini
- Musculus uvulae
- Palatopharyngeus
- Palatoglossus
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Tongue |
Extrinsic |
- Genioglossus
- Hyoglossus
- Styloglossus
- Palatoglossus
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Intrinsic |
- Superior longitudinal
- Inferior longitudinal
- Transverse
- Vertical
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|
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Index of muscle
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Description |
- Anatomy
- head
- neck
- arms
- chest and back
- diaphragm
- abdomen
- genital area
- legs
- Muscle tissue
- Physiology
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Disease |
- Myopathy
- Soft tissue
- Connective tissue
- Congenital
- abdomen
- muscular dystrophy
- Neoplasms and cancer
- Injury
- Symptoms and signs
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|
Treatment |
- Procedures
- Drugs
- anti-inflammatory
- muscle relaxants
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|
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UpToDate Contents
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English Journal
- Krey KF1, Dannhauer KH, Hierl T.
- Journal of orofacial orthopedics = Fortschritte der Kieferorthopadie : Organ/official journal Deutsche Gesellschaft fur Kieferorthopadie.J Orofac Orthop.2015 May 2. [Epub ahead of print]
- OBJECTIVES: The purpose of this work was to define and illustrate the skeletal morphology of open-bite patients against the background of sagittal jaw relationships on the basis of lateral cephalograms.MATERIALS AND METHODS: Lateral cephalograms of 197 untreated adults were analyzed in dental imagi
- PMID 25929714
- Inferior displacement of the lower belly of the lateral pterygoid muscle: a sign of temporomandibular joint lesions.
- Ochoa Escudero M1, Juliano AF, Curtin HD.
- Journal of computer assisted tomography.J Comput Assist Tomogr.2015 May-Jun;39(3):340-2. doi: 10.1097/RCT.0000000000000225.
- OBJECTIVE: The purposes of this article are to report the imaging finding of inferior displacement of the lower belly of the lateral pterygoid muscle (LPM) in patients with lesions arising from the temporomandibular joint (TMJ) and to propose that this imaging finding is suggestive of the presence o
- PMID 25700228
- Long-term results of ORIF of condylar head fractures of the mandible: A prospective 5-year follow-up study of small-fragment positional-screw osteosynthesis (SFPSO).
- Kolk A1, Neff A2.
- Journal of cranio-maxillo-facial surgery : official publication of the European Association for Cranio-Maxillo-Facial Surgery.J Craniomaxillofac Surg.2015 May;43(4):452-61. doi: 10.1016/j.jcms.2015.02.004. Epub 2015 Feb 13.
- BACKGROUND: Optimum treatment of condylar head fractures (CHF) remains subject to controversy. There are currently a variety of alternative techniques applied, data in literature are often inconsistent and especially systematic long-term data on results after treatment by open reduction and internal
- PMID 25773375
Japanese Journal
- 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
- A Case of Infratemporal Fossa Abscess with Signs of Chronic Maxillary Osteomyelitis
Related Links
- 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 ...
- The lateral pterygoid plate of the sphenoid (or lateral lamina of pterygoid process ) is broad, thin, and everted; its lateral surface forms part of the medial wall of the infratemporal fossa, and gives attachment to the lateral pterygoid muscle; ...
★リンクテーブル★
[★]
- 英
- lateral pterygoid (M,K), lateral pterygoid muscle
- ラ
- musculus pterygoideus lateralis
- 関
- 咀嚼筋
神経
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
[★]
- 関
- aspect、external、externally、flanking、laterale、lateralis、laterally、outer、outside、profile、side、sided、sidedness
[★]
- 関
- winged