内耳道
WordNet
- work as an intern; "The young doctor is interning at the Medical Center this year"
- an advanced student or graduate in medicine gaining supervised practical experience (`houseman is a British term) (同)interne, houseman, medical intern
- deprive of freedom; "During WW II, Japanese were interned in camps in the West"
- happening or arising or located within some limits or especially surface; "internal organs"; "internal mechanism of a toy"; "internal party maneuvering"
- occurring within an institution or community; "intragroup squabbling within the corporation" (同)intragroup
- a remedy for hearing loss or deafness
- of or relating to the science of acoustics; "acoustic properties of a hall" (同)acoustical
- the flesh of animals (including fishes and birds and snails) used as food
- the study of the physical properties of sound
PrepTutorEJDIC
- (特に戦時中)〈人・船など〉‘を'強制収容する,抑留する
- 『内側の』,内部にある / 『国内の』(domestic) / 内からとる,内用の
- 音響の;聴覚の / (特に楽器が電気的に増幅・変化されていない)自然音を出す
- (食用の)『動物の肉』 / 《英古》《米文》(一般的に)『食物』(food) / (課実などの)食用部分,果肉 / (議論・書物などの)最も重要な部分,主眼点,骨子《+『of』+『名』》
- 《単数扱い》音響学 / 《複数扱い》(劇場などの)音響効果
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/11/17 13:19:33」(JST)
[Wiki en表示]
| Internal auditory meatus |
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Left temporal bone. Inner surface.
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Diagrammatic view of the fundus of the right internal acoustic meatus.
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| Details |
| Identifiers |
| Latin |
meatus acusticus internus |
| TA |
A02.1.06.033 |
| FMA |
53163 |
| Anatomical terms of bone
[edit on Wikidata]
|
The internal auditory meatus (also meatus acusticus internus, internal acoustic meatus, internal auditory canal, internal acoustic canal, or IAC) is a canal within the petrous part of the temporal bone of the skull between the posterior cranial fossa and the inner ear.
Contents
- 1 Function
- 2 Structure
- 3 Additional images
- 4 References
- 5 See also
- 6 External links
Function
The internal auditory meatus provides a passage through which the vestibulocochlear nerve, the facial nerve, and the labyrinthine artery (an internal auditory branch of the basilar artery) can pass from inside the skull to structures of the inner ear and face.
It also contains the vestibular ganglion.
Structure
The opening to the meatus is called the porus acusticus internus, or its English translation, the internal acoustic opening. It is located inside the posterior cranial fossa of the skull, near the center of the posterior surface of the petrous part of the temporal bone. The size varies considerably; its margins are smooth and rounded.
The internal auditory meatus is short (about 1 cm) and runs laterally into the bone.
At its end are the openings for three different canals, one of which is the facial canal. The facial nerve travels through the facial canal, eventually exiting the skull at the stylomastoid foramen.
The antero-superior part transmits the facial nerve and nervus intermedius and is separated from the postero-superior section, which transmits the superior vestibular nerve, by Bill's bar (named by William F. House). The falciform crest or transverse crest separates the superior part from the inferior part. The cochlear nerve runs antero-inferiorly and the inferior vestibular nerve runs postero-inferiorly.
Additional images
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Temporal bone at birth. Inner aspect.
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Base of the skull. Upper surface.
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Horizontal section through left ear; upper half of section.
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The cochlea and vestibule, viewed from above.
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Tympanic cavity. Facial canal. Internal carotid artery.
References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
See also
External links
- Anatomy figure: 30:01-08 at Human Anatomy Online, SUNY Downstate Medical Center
- cranialnerves at The Anatomy Lesson by Wesley Norman (Georgetown University) (VII)
- Diagram of Porus acusticus internus
- Diagram of Porus acusticus internus
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The neurocranium of the skull
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| Occipital |
| Squamous part |
- external
- Inion/External occipital protuberance
- External occipital crest
- Nuchal lines
- planes
- internal
- Cruciform eminence
- Internal occipital protuberance
- Sagittal sulcus
- Internal occipital crest
- Groove for transverse sinus
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| Lateral parts |
- Condyle
- Condyloid fossa
- Condylar canal
- Hypoglossal canal
- jugular
- Jugular process
- Jugular tubercle
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| Basilar part |
- Pharyngeal tubercle
- Clivus
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| Other |
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| Parietal |
- Parietal eminence
- Temporal line
- Parietal foramen
- Sagittal sulcus
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| Frontal |
| Squamous part |
- Frontal suture
- Frontal eminence
- external
- Superciliary arches
- Glabella
- foramina
- Zygomatic process
- internal
- Sagittal sulcus
- Frontal crest
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| Orbital part |
- Ethmoidal notch
- Fossa for lacrimal gland
- Trochlear fovea
- Frontal sinus
- Frontonasal duct
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| Temporal |
| Squamous part |
- Articular tubercle
- Suprameatal triangle
- Mandibular fossa
- Petrotympanic fissure
- Zygomatic process
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| Mastoid part |
- Mastoid foramen
- Mastoid process (Mastoid cells)
- Mastoid notch
- Occipital groove
- Sigmoid sulcus
- Mastoid antrum (Aditus)
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| Petrous part |
- Carotid canal
- Facial canal
- Internal auditory meatus
- Cochlear aqueduct
- Stylomastoid foramen
- fossae
- Subarcuate fossa
- Jugular fossa
- canaliculi
- Inferior tympanic
- Mastoid
- Styloid process
- Petrosquamous suture
- (note: ossicles in petrous part, but not part of temporal bone)
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| Tympanic part |
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| Sphenoid |
| Surfaces |
- Superior surface: Sella turcica
- Dorsum sellae
- Tuberculum sellae
- Hypophysial fossa
- Posterior clinoid processes
- Ethmoidal spine
- Chiasmatic groove
- Middle clinoid process
- Petrosal process
- Clivus
- Lateral surface: Carotid groove
- Sphenoidal lingula
- Anterior surface: Sphenoidal sinuses
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| Great wings |
- foramina
- Rotundum
- Ovale
- Vesalii
- Spinosum
- Spine
- Infratemporal crest
- Sulcus of auditory tube
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| Small wings |
- Superior orbital fissure
- Anterior clinoid process
- Optic canal
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Pterygoid
processes |
- fossae
- pterygoid plates
- Pterygoid canal
- Hamulus
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| Other |
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| Ethmoid |
| Plates |
- Cribriform plate
- Crista galli
- Olfactory foramina
- Perpendicular plate
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| Surfaces |
- Lateral surface Orbital lamina
- Uncinate process
- Medial surface Supreme nasal concha
- Superior nasal concha
- Superior meatus
- Middle nasal concha
- Middle meatus
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| Labyrinth |
- Ethmoid sinus
- ethmoidal foramina
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Foramina of the skull (and canals, fissures, meatus, and hiatus)
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| Anterior cranial fossa |
| to Orbit: |
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| to Nasal cavity: |
- olfactory foramina (CN-I)
- foramen cecum
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| Middle cranial fossa |
| to Orbit: |
- optic canal (CN-II)
- superior orbital fissure (CN-III,IV,V1,VI)
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| to Pterygopalatine fossa: |
- foramen rotundum (CN-V2)
- pterygoid canal
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| to Infratemporal fossa: |
- foramen ovale (CN-V3)
- foramen spinosum/carotid canal
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| other: |
- foramen lacerum
- hiatus for greater petrosal nerve
- hiatus for lesser petrosal nerve
- sphenoidal emissary foramen
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| Posterior cranial fossa |
- internal auditory meatus/facial canal/stylomastoid foramen (CN-VII,VIII)
- jugular foramen (CN-IX,X,XI)
- foramen magnum (CN-XI)
- hypoglossal canal (CN-XII)
- condylar canal
- mastoid foramen
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| Orbit |
| to Nasal cavity: |
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| to face: |
- supraorbital
- infraorbital
- zygomatic foramen
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| to Pterygopalatine fossa: |
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| other: |
- Inferior orbital fissure
- Fossa for lacrimal sac
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| Pterygopalatine fossa |
| to Nasal cavity: |
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| to Oral cavity: |
- greater palatine canal
- lesser palatine canals
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| to Infratemporal fossa: |
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| to Nasopharynx: |
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| to oral cavity: |
- incisive canals
- incisive foramen
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| to nasal cavity: |
- Foramen vomerinum
- Meatus vomerinus
- Fissura vomerina
- Hiatus vomerinus
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| Other |
- external acoustic meatus
- mandibular foramen
- mental foramen
- parietal foramen
- petrotympanic fissure
- semilunar hiatus
|
UpToDate Contents
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English Journal
- High jugular bulb: different osseous landmarks and their clinical implications.
- Singla A1, Gupta T2, Sahni D2, Aggarwal A2, Gupta A3.
- Surgical and radiologic anatomy : SRA.Surg Radiol Anat.2016 Feb 23. [Epub ahead of print]
- PURPOSE: The purpose of this investigation was to compare the rate of high jugular bulb (HJB) in relation to internal acoustic meatus (IAM), round window (RW) and endolymphatic sac and to study their clinical implications.METHODS: Eighty-seven cadaveric non-pathologic human temporal bones were micro
- PMID 26905075
- Petrosectomy and Topographical Anatomy in Traditional Kawase and Posterior Intradural Petrous Apicectomy (PIPA) Approach: An Anatomical Study.
- Rigante L1, Herlan S2, Tatagiba MS2, Stanojevic M2, Hirt B3, Ebner FH2.
- World neurosurgery.World Neurosurg.2016 Feb;86:93-102. doi: 10.1016/j.wneu.2015.08.083. Epub 2015 Dec 14.
- OBJECTIVE: To compare the anatomical exposure and petrosectomy extent in the Kawase and posterior intradural petrous apicectomy (PIPA) approaches.METHODS: Kawase and PIPA approaches were performed on 4 fixed cadaveric heads (3 alcohol-fixed, 1 formaldehyde-fixed silicone-injected; 4 Kawase and 4 PIP
- PMID 26431733
- The cochlea in skull base surgery: an anatomy study.
- Wang J1, Yoshioka F2, Joo W3, Komune N4,2, Quilis-Quesada V2, Rhoton AL Jr2.
- Journal of neurosurgery.J Neurosurg.2016 Jan 29:1-11. [Epub ahead of print]
- OBJECTIVE The object of this study was to examine the relationships of the cochlea as a guide for avoiding both cochlear damage with loss of hearing in middle fossa approaches and injury to adjacent structures in approaches directed through the cochlea. METHODS Twenty adult cadaveric middle fossae w
- PMID 26824375
Japanese Journal
- 増田 理佐,加藤 明子,大淵 豊明 [他],寳地 信介,橋田 光一,武永 芙美子,鈴木 秀明
- 耳鼻咽喉科臨床 106(6), 509-513, 2013
- … The labyrinth was destroyed, and the internal acoustic meatus was indistinguishable. …
- NAID 130003374076
- 持続性方向交代性下行性眼振を示した聴神経腫瘍の1例
- 晝間 清
- Equilibrium Research 72(1), 17-21, 2013
- … We report herein on a case of acoustic neuroma, which showed persistent geotropic positional nystagmus at the fourth time under clinical observation. … The affected side was thought to be that to which the neutral point deviated from the supine position, so the affected side of this positional nystagmus corresponded to that of the acoustic neuroma. …
- NAID 130003372584
- 臨床 聴神経腫瘍によって誘発されたと考えられる管内結石症が原因の良性発作性頭位めまい症例
- 晝間 清,渡部 涼子,新井 智之 [他],崎谷 恵理
- 耳鼻咽喉科臨床 105(9), 817-820, 2012
- … We report on two cases of acoustic neuroma, which showed posterior semicircular canal (pSCC) type BPPV. … This symptom was a peripheral vestibular disorder in the inner ear and was not a retrolabyrinthine disorder associated with the tumor in the internal auditory meatus. …
- NAID 130002141248
Related Links
- internal acoustic meatus, an opening in the petrous portion of the temporal bone through which the facial, intermediate, and vestibulocochlear nerves and the labyrinthine artery pass. Also called meatus acusticus internus. meatus pl. meatus ...
- me·a·tus (mē-ā′təs) n. pl. me·a·tus·es or meatus A body opening or passage, such as the opening of the ear or the urethral canal. [Latin meātus, passage, from past participle of meāre, to pass; see mei-1 in Indo-European roots.] ...
★リンクテーブル★
[★]
- 英
- internal acoustic meatus (KA), internal auditory meatus, internal auditory canal
- ラ
- meatus acusticus internus
- 関
- 内耳神経、内耳孔
- 内耳孔からほぼ外側(わずかに前方)に向かい蝸牛器官、前庭器官に至る
通過する構造物
-
- 上部前庭神経：前膨大部(回転, 矢状断平面＊)、外側膨大部(回転, 冠状断平面＊)、卵形嚢(水平加速度)
- 下部前庭神経：後膨大部(回転, 水平断平面＊)、球形嚢(垂直加速度)
- ＊錐体は頭蓋に対してある角度をもって位置しているため、厳密な意味で水平断平面、矢状断平面、冠状断平面ではない。
[★]
- 関
- acoustical、audition、auditory、hearing
[★]
- 関
- endo、in vivo、interior、internally、intra
[★]
道
- 関
- canal、duct、ductal、ductus、pipe、street、tubal、tube、vas
[★]
[★]
- 関
- flesh