関: inside wall

WordNet

surround with a wall in order to fortify (同)palisade, fence, fence in, surround
a difficult or awkward situation; "his back was to the wall"; "competition was pushing them to the wall"
a layer of material that encloses space; "the walls of the cylinder were perforated"; "the containers walls were blue"
a masonry fence (as around an estate or garden); "the wall followed the road"; "he ducked behind the garden wall and waited"
an architectural partition with a height and length greater than its thickness; used to divide or enclose an area or to support another structure; "the south wall had a small window"; "the walls were covered with pictures"
(anatomy) a layer (a lining or membrane) that encloses a structure; "stomach walls" (同)paries
a vertical (or almost vertical) smooth rock face (as of a cave or mountain)
anything that suggests a wall in structure or function or effect; "a wall of water"; "a wall of smoke"; "a wall of prejudice"; "negotiations ran into a brick wall"
located or occurring within or closer to a center; "an inner room"
located inward; "Beethovens manuscript looks like a bloody record of a tremendous inner battle"- Leonard Bernstein; "she thinks she has no soul, no interior life, but the truth is that she has no access to it"- David Denby; "an internal sense of rightousness"- A.R.Gurney,Jr. (同)interior, internal
innermost or essential; "the inner logic of Cubism"; "the internal contradictions of the theory"; "the intimate structure of matter" (同)internal, intimate
exclusive to a center; especially a center of influence; "inner regions of the organization"; "inner circles of government"
inside or closer to the inside of the body; "the inner ear"
an alliance of nations joining together to fight a common enemy

PrepTutorEJDIC

{C}(石・れんがなどの)『壁』,へい / {U}(胃などの)内壁,内側 / {C}(…の)壁[のようなもの]《+of+名》 / …‘を'壁(へい)で囲む / …‘を'壁で仕切る / 〈窓・入り口など〉‘を'壁ぃふさぐ《+up+名,+名+up》
『内側の』,『内部の』,奥の / 『精神の』,心の / 親密な;内密の
『宿屋』,小さな旅館

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/08/29 08:24:15」(JST)

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The tympanic cavity is a small cavity surrounding the bones of the middle ear.

Structure

On its lateral surface, it abuts the external auditory meatus from which it is separated by the tympanic membrane (eardrum).

Walls

The tympanic cavity is bounded by:

Facing the inner ear, the medial wall (or Labyrinthic wall) is vertical, and has the oval window and round window, the promontory, and the prominence of the facial canal.
Facing the outer ear, the lateral wall (or membranous wall), is formed mainly by the tympanic membrane, partly by the ring of bone into which this membrane is inserted. This ring of bone is incomplete at its upper part, forming a notch (notch of Rivinus), close to which are three small apertures: the "iter chordæ posterius", the petrotympanic fissure, and the "iter chordæ anterius". The iter chordæ posterius (apertura tympanica canaliculi chordæ) is situated in the angle of junction between the mastoid and membranous wall of tympanic cavity immediately behind the tympanic membrane and on a level with the upper end of the manubrium of the malleus; it leads into a minute canal, which descends in front of the canal for the facial nerve, and ends in that canal near the stylo-mastoid foramen. Through it the chorda tympani nerve enters the ympanic cavity. The petrotympanic fissure (fissura petrotympanica; Glaserian fissure) opens just above and in front of the ring of bone into which the tympanic membrane is inserted; in this situation it is a mere slit about 2 mm. in length. It lodges the anterior process and anterior ligament of the malleus, and gives passage to the anterior tympanic branch of the internal maxillary artery. The iter chordæ anterius (canal of Huguier) is placed at the medial end of the petrotympanic fissure; through it the chorda tympani nerve leaves the tympanic cavity.
The roof of the cavity (also called the tegmental wall, tegmental roof or tegmentum tympani) is formed by a thin plate of bone, the tegmen tympani, which separates the cranial and tympanic cavities. It is situated on the anterior (frontal) surface of the petrous portion of the temporal bone close to its angle of junction with the squama temporalis; it is prolonged backward so as to roof in the tympanic antrum, and forward to cover in the semicanal for the tensor tympani muscle. Its lateral edge corresponds with the remains of the petrosquamous suture.^[1] The Atticus is the part of the tegmentum tympani where the stapes and incus are attached.
The floor of the cavity (also called the jugular wall) is narrow, and consists of a thin plate of bone (fundus tympani) which separates the tympanic cavity from the jugular fossa. It presents, near the labyrinthic wall, a small aperture for the passage of the tympanic branch of the glossopharyngeal nerve.
The 'posterior wall (or mastoid wall) is wider above than below, and presents for examination the entrance to the tympanic antrum, the pyramidal eminence, and the fossa incudis.
The anterior wall (or carotid wall) is wider above than below; it corresponds with the carotid canal, from which it is separated by a thin plate of bone perforated by the tympanic branch of the internal carotid artery, and by the deep petrosal nerve which connects the sympathetic plexus on the internal carotid artery with the tympanic plexus on the promontory. At the upper part of the anterior wall are the orifice of the semicanal for the Tensor tympani muscle and the tympanic orifice of the auditory tube, separated from each other by a thin horizontal plate of bone, the septum canalis musculotubarii. These canals run from the tympanic cavity forward and downward to the retiring angle between the squama and the petrous portion of the temporal bone.

Development

It is formed from the tubotympanic recess, an expansion of the first pharyngeal pouch.

Clinical significance

If damaged, the tympanic membrane can be repaired in a procedure called tympanoplasty.

Should fluid accumulate within the middle ear as the result of infection or for some other reason, it can be drained by puncturing the tympanic membrane with a large bore needle (tympanocentesis).

Additional images

External and middle ear, opened from the front. Right side.
Horizontal section through left ear; upper half of section.
Tympanic cavity. Facial canal. Internal carotid artery.
Auditory ossicles. Tympanic cavity. Deep dissection.

References

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

^ Public domain edition of Gray's Anatomy

External links

Tympanic+cavity at eMedicine Dictionary
http://www.dartmouth.edu/~humananatomy/figures/chapter_44/44-5.HTM
http://www.thefreedictionary.com/tympanic+cavity
http://education.yahoo.com/reference/gray/subjects/subject/230

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「内壁」

Tympanic cavity
	Malleus Tensor Tympani Incus Stapedius Labyrinth Stapes Auditory Canal Tympanic Membrane; (Ear Drum) Eustachian Tube Tympanic cavity Bones and muscles in the tympanic cavity in the middle ear
	The cochlea and vestibule, viewed from above. (Tympanic cavity labeled at upper right.)
Latin	cavitas tympani
Gray's	p.1037
Artery	stylomastoid artery
Precursor	first pharyngeal pouch
	Anatomical terminology

　　[★]

英: inner wall、inside wall

「inside wall」

　　[★]

内壁

関: inner wall

「inner」

　　[★]

adj.

内側の

関: inside、interior、medial、medialis、medially

「wall」

　　[★]

壁

[1] Public domain edition of Gray's Anatomy

リンク元	「内壁」「inside wall」
関連記事	「inner」「wall」

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案内

案内

inner wall