ethmoidal labyrinth

WordNet

1. one of the eight bones of the cranium; a small bone filled with air spaces that forms part of the eye sockets and the nasal cavity (同)ethmoid_bone

PrepTutorEJDIC

1. 〈C〉(…の)迷路,迷宮(maze)《+『of』+『名』》 / 《the L-》ラビュリントス(ギリシア神話でMinos王が怪物Minotaurを監禁するためDaedalusに造らせたCrete島の地下の大迷宮)

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/01/11 05:33:59」(JST)

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Labyrinth of ethmoid
Ethmoid bone from behind.
Details
Latin	labyrinthus ethmoidalis
Identifiers
Dorlands /Elsevier	l_01/12474317
TA	A02.1.07.007
FMA	57448
Anatomical terms of bone [edit on Wikidata]

The Labyrinth or Lateral Mass of the ethmoid bone consists of a number of thin-walled cellular cavities, the ethmoidal cells, arranged in three groups, anterior, middle, and posterior, and interposed between two vertical plates of bone; the lateral plate forms part of the orbit, the medial plate forms part of the nasal cavity. In the disarticulated bone many of these cells are opened into, but when the bones are articulated, they are closed in at every part, except where they open into the nasal cavity.

Surfaces

The upper surface of the labyrinth presents a number of half-broken cells, the walls of which are completed, in the articulated skull, by the edges of the ethmoidal notch of the frontal bone. Crossing this surface are two grooves, converted into canals by articulation with the frontal; they are the anterior and posterior ethmoidal canals, and open on the inner wall of the orbit. The posterior surface presents large irregular cellular cavities, which are closed in by articulation with the sphenoidal concha and orbital process of palatine bone. The lateral surface is formed of a thin, smooth, oblong plate, the lamina papyracea (os planum), which covers in the middle and posterior ethmoidal cells and forms a large part of the medial wall of the orbit; it articulates above with the orbital plate of the frontal bone, below with the maxilla and orbital process of the palatine, in front with the lacrimal, and behind with the sphenoid.

In front of the lamina papyracea are some broken air cells which are overlapped and completed by the lacrimal bone and the frontal process of the maxilla. A curved lamina, the uncinate process, projects downward and backward from this part of the labyrinth; it forms a small part of the medial wall of the maxillary sinus, and articulates with the ethmoidal process of the inferior nasal concha.

The medial surface of the labyrinth forms part of the lateral wall of the corresponding nasal cavity. It consists of a thin lamella, which descends from the under surface of the cribriform plate, and ends below in a free, convoluted margin, the middle nasal concha. It is rough, and marked above by numerous grooves, directed nearly vertically downward from the cribriform plate; they lodge branches of the olfactory nerves, which are distributed to the mucous membrane covering the superior nasal concha. The back part of the surface is subdivided by a narrow oblique fissure, the superior meatus of the nose, bounded above by a thin, curved plate, the superior nasal concha; the posterior ethmoidal cells open into this meatus. Below, and in front of the superior meatus, is the convex surface of the middle nasal concha; it extends along the whole length of the medial surface of the labyrinth, and its lower margin is free and thick. The lateral surface of the middle concha is concave, and assists in forming the middle meatus of the nose. The middle ethmoidal cells open into the central part of this meatus, and a sinuous passage, termed the infundibulum, extends upward and forward through the labyrinth and communicates with the anterior ethmoidal cells, and in about 50 per cent. of skulls is continued upward as the frontonasal duct into the frontal sinus.

References

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

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English Journal

• Endoscopic surgery of the olfactory cleft.

• Jankowski R1, Rumeau C2, Gallet P2, Nguyen DT2, Russel A2, Toussaint B2.
• European annals of otorhinolaryngology, head and neck diseases.Eur Ann Otorhinolaryngol Head Neck Dis.2017 Oct 23. pii: S1879-7296(17)30156-4. doi: 10.1016/j.anorl.2017.09.005. [Epub ahead of print]
• PMID 29074286

• Ethmoid malformation associated with pediatric nasal polyposis and allergic fungal sinusitis.

• Hanson CG1,2, Proctor TB3.
• Journal of surgical case reports.J Surg Case Rep.2017 Jun 5;2017(6):rjx099. doi: 10.1093/jscr/rjx099. eCollection 2017 Jun.
• PMID 28596822

• [The application of the computer technologies for the mathematical simulation of the ethmoidal labyrinth].

• Markeeva MV1, Mareev OV1, Nikolenko VN2, Mareev GO1, Danilova TV3, Fadeeva EA1, Fedorov RV3.
• Vestnik otorinolaringologii.Vestn Otorinolaringol.2017;82(5):36-39. doi: 10.17116/otorino201782536-39.
• PMID 29072661

Japanese Journal

• コーンビーム型CTスキャンによるジャイアントパンダ頭部の三次元画像解析(短報)(解剖学)

• The journal of veterinary medical science 64(12), 1153-1155, 2002-12-25
• NAID 110003886086

Related Pictures

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★リンクテーブル★

リンク元	「篩骨迷路」
関連記事	「ethmoidal」

「篩骨迷路」

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英

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英

ethmoidal labyrinth

「ethmoidal」

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• adj.

• 篩骨の

関

ethmoid bone