WordNet

the slender arch formed by the temporal process of the cheekbone that bridges to the zygomatic process of the temporal bone (同)zygomatic_arch, arcus_zygomaticus
a passageway under a curved masonry construction; "they built a triumphal arch to memorialize their victory" (同)archway
(architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it
a curved shape in the vertical plane that spans an opening
expert in skulduggery; "an arch criminal"
a curved bony structure supporting or enclosing organs (especially the inner sides of the feet)
(used of behavior or attitude) characteristic of those who treat others with condescension (同)condescending, patronizing, patronising
form an arch or curve; "her back arches"; "her hips curve nicely" (同)curve, arc
naughtily or annoyingly playful; "teasing and worrying with impish laughter"; "a wicked prank" (同)impish, implike, mischievous, pixilated, prankish, puckish, wicked
a continuous portion of a circle
constructed with or in the form of an arch or arches; "an arched passageway"
of or relating to the cheek region of the face

PrepTutorEJDIC

(建物の)『アーチ』,迫持(せりもち) / アーチ型の記念碑,弓形門 / 『弓形のもの』 / (足の)土踏まず / …'を'弓形にする / …‘に'アーチをかける / 弓形になる,弓状に伸びる
《名詞の前にのみ用いて》おもな,主要な(chief) / (おもに女・子供が)ずるそうな,いたずらそうな(mischievous)
『弧』,円弧 / 電弧(2点間を弧状に流れる電流) / 弧を描く / 電弧を生じる
アーチ形の,弓形の / アーチのある
are (面積の単位)の変形

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/07/18 21:04:07」(JST)

wiki en

The zygomatic arch or cheek bone is formed by the zygomatic process of temporal bone (a bone extending forward from the side of the skull, over the opening of the ear) and the temporal process of the zygomatic bone (the side of the cheekbone), the two being united by an oblique suture (zygomaticotemporal suture);^[1] the tendon of the Temporalis passes medial to the arch to gain insertion into the coronoid process of the mandible. The jugal point is the point at the anterior end of the upper border of the zygomatic arch where the masseteric and maxillary edges meet at an angle. The jugal point is the anterior end of upper border of the zygomatic arch where it meets the process of the zygomatic bone.

Structure

The zygomatic process of the temporal arises by two roots:

an anterior, directed inward in front of the mandibular fossa, where it expands to form the articular tubercle.
a posterior, which runs backward above the external acoustic meatus and is continuous with the supramastoid crest.

The upper border of the arch gives attachment to the temporal fascia;^[2] the lower border and medial surface give origin to the Masseter.

History

Etymology

The term zygomatic derives from the Greek ζύγωμα zygōma meaning "bolt, bar", derived from ζυγο- "yoke, join". The Greek word was already used with this anatomical sense by Galen (2.437, 746) in the 2nd century AD. The zygomatic arch is occasionally referred to as the zygoma, but this term usually refers to the zygomatic bone or occasionally the zygomatic process.

Other animals

The zygomatic arch is significant in evolutionary biology, as it is part of the structures derived from the ancestral single temporal fenestra of the synapsid ancestor of mammals.

Additional images

Left temporal bone. Outer surface.
Left zygomatic bone. Malar surface.
Base of skull. Inferior surface.
The Temporalis; the zygomatic arch and Masseter have been removed.
Dissection, showing salivary glands of right side.
Fracture of the zygomatic arch as seen on plain Xray
Zygomatic arch.Base of skull.

References

This article incorporates text from a public domain edition of Gray's Anatomy.

^ Herring, Susan W.; Mucci, Robert J. (1991). "In vivo strain in cranial sutures: The zygomatic arch". Journal of Morphology 207 (3): 225–239. doi:10.1002/jmor.1052070302. ISSN 0362-2525.
^ Abul-Hassan HS, von Drasek Ascher G, Acland RD (January 1986). "Surgical anatomy and blood supply of the fascial layers of the temporal region". Plastic and Reconstructive Surgery 77 (1): 17–28. doi:10.1097/00006534-198601000-00004. PMID 3941846. |accessdate= requires |url= (help)

External links

Zygomatic+arch at eMedicine Dictionary
lesson1 at The Anatomy Lesson by Wesley Norman (Georgetown University) (latskullitems)
Anatomy diagram: 34257.000-1 at Roche Lexicon - illustrated navigator, Elsevier

UpToDate Contents

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1. 成人における顔面外傷 facial trauma in adults
2. 眼窩骨折 orbital fractures

English Journal

Correction of zygoma and zygomatic arch protrusion in East Asian individuals.

Chen T, Hsu Y, Li J, Hu J, Khadka A, Wang Q, Wang D.AbstractOBJECTIVE: Prominent zygoma is commonly seen in the East Asian population with the clinical characteristics of anteriorly and/or laterally projected zygoma and zygomatic arch resulting in an increased midfacial width. The esthetic surgical modification of zygoma is one of the major aspects of facial-contouring surgery in certain parts of the world. This article aims to evaluate the effectiveness of various surgical methods for reducing the prominent zygoma so as to obtain a harmonious and natural facial contour.
Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.Oral Surg Oral Med Oral Pathol Oral Radiol Endod.2011 Sep;112(3):307-14. Epub 2011 Feb 3.
OBJECTIVE: Prominent zygoma is commonly seen in the East Asian population with the clinical characteristics of anteriorly and/or laterally projected zygoma and zygomatic arch resulting in an increased midfacial width. The esthetic surgical modification of zygoma is one of the major aspects of facial
PMID 21292518

Mastication and the postorbital ligament: dynamic strain in soft tissues.

Herring SW, Rafferty KL, Liu ZJ, Lemme M.SourceDepartment of Orthodontics, School of Dentistry, University of Washington, Seattle, WA 98195-7446, USA.
Integrative and comparative biology.Integr Comp Biol.2011 Aug;51(2):297-306. Epub 2011 May 18.
Although the FEED database focuses on muscle activity patterns, it is equally suitable for other physiological recording and especially for synthesizing different types of information. The present contribution addresses the interaction between muscle activity and ligamentary stretch during masticati
PMID 21593142

Japanese Journal

Subtemporal approach : 注意すべき静脈灌流路と局所解剖を中心に(<特集>手術アプローチの選択とピットフォールI-第24回微小脳神経外科解剖セミナーより-)

戸田正博,吉田一成,河瀬斌
脳神経外科ジャーナル 19(10), 742-752, 2010-10-20
Subtemporal approachは側頭葉内側の頭蓋底病変や脳底動脈の動脈瘤などに対する到達法でさまざまなvariationがあるが,側頭葉は前方で中頭蓋窩に深く陥入しているため,脳ベラの圧排による脳損傷や側頭葉を灌流する静脈群の損傷を回避する工夫が必要である.側頭葉の圧排損傷を軽減する方法として,テント上病変に対しては,頬骨弓の切離と中頭蓋底に沿った開頭,テント下病変に対しては錐体削除が必 …
NAID 110007730743

顔面神経を一旦切離してアプローチした, 側頭筋から頬部に浸潤した脂肪肉腫の治療経験

古川洋志,堤田新,齋藤亮,石山誠一郎,櫻井圭祐,関堂充,山本有平,山田洋介,久保田佳奈子
日本マイクロサージャリー学会会誌 = Journal of Japanese Society of Reconstructive Microsurgery 23(1), 75-79, 2010-03-01
NAID 10027462197