外耳道
WordNet
- the quantity contained in a can (同)canful
- preserve in a can or tin; "tinned foods are not very tasty" (同)tin, put_up
- airtight sealed metal container for food or drink or paint etc. (同)tin, tin_can
- a buoy with a round bottom and conical top (同)can buoy
- purely outward or superficial; "external composure"; "an external concern for reputation"- A.R.Gurney,Jr.
- outward features; "he enjoyed the solemn externals of religion"
- coming from the outside; "extraneous light in the camera spoiled the photograph"; "relying upon an extraneous income"; "disdaining outside pressure groups" (同)extraneous, outside
- from or between other countries; "external commerce"; "international trade"; "developing nations need outside help" (同)international, outside
- happening or arising or located outside or beyond some limits or especially surface; "the external auditory canal"; "external pressures"
- provide (a city) with a canal (同)canalize, canalise
- long and narrow strip of water made for boats or for irrigation
- (astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion
- a qualified accountant who inspects the accounting records and practices of a business or other organization
- a student who attends a course but does not take it for credit
- of or relating to the process of hearing; "auditory processing"; "an audile person" (同)audile, auditive
PrepTutorEJDIC
- 《能力》『…することができる』 《可能性・推量》 《平叙文で》『…であり得る』 し得る,かもしれない 《否定文で》…のはずがない,ではあり得ない 《疑問文で》いったい…だろうか 《話》《許可・軽い命令》『…してもよい』 …してあげよう;《疑問文で》…してくれませんか
- 『かん』(取っ手・ふた・口のついた金属・プラスチック製容器・コップなど) / 《米》(かん詰めの)『かん』,かん詰め(《英》 tin) / かん1杯(の…)《+『of』+『名』》 / …'を'かん詰めにする(また《英》 『tin』) / 《米俗》…'を'くびにする
- canceled / cancellation / canon / canto
- 『外側の』,外部の / (作用・動作などが)『外側からの』,外部からの / 表面上の,見せかけの / 体外の;体外用の / 外国の(foreign) / (…の)外観,外形《+『of』+『名』》
- 『運河』 / (食道・気菅などの)導菅 / (火星の苗面に見える)運河状の地形
- 《まれ》聞き手,傍聴人 / 会計検査官,監査役 / 《米》(大学で単位を取らない)聴講生
- 耳の,聴覚の
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2012/11/01 15:26:37」(JST)
[Wiki en表示]
External acoustic meatus |
|
Anatomy of the human ear. |
Latin |
meatus acusticus externus |
Gray's |
subject #229 1036 |
Artery |
anterior part: superficial temporal artery
posterior part: posterior auricular artery |
Vein |
superficial temporal veins, external jugular vein, pterygoid plexus |
Nerve |
auriculotemporal nerve, great auricular nerve, auricular branch of vagus nerve |
Lymph |
superficial cervical lymph nodes, deep cervical lymph nodes |
Precursor |
groove (cleft) of the first branchial arch.[1] |
The ear canal (external auditory meatus, external acoustic meatus, EAM) (Latin: meatus acusticus externus), is a tube running from the outer ear to the middle ear. The adult human ear canal extends from the pinna to the eardrum and is about 35 mm in length and 5 to 10 mm in diameter.
Contents
- 1 Structure
- 2 Disorders
- 3 Earwax
- 4 Additional images
- 5 See also
- 6 References
- 7 External links
|
Structure
The human ear canal is divided into two parts. The fibrocartilaginous part forms the outer third of the canal, Its anterior and lower wall are cartilaginous, whereas its superior and back wall are fibrous. The cartilage is the continuation of the cartilage framework of pinna. The bony part forms the inner two thirds. The bony part is much shorter in children and is only a ring (annulus tympanicus) in the newborn.
Size and shape of the canal vary among individuals. The canal is approximately 35 mm long and 5 to 10 mm in diameter. It has a sigmoid form and runs from behind and above downward and forward. On the cross-section, it is of oval shape. These are important factors to consider when fitting earplugs.
Disorders
The ear canal, because of its relative exposure to the outside world, is a common victim of diseases and other disorders. Some disorders include:
- Atresia of the ear canal
- Otitis externa (swimmer's ear), bacteria-caused inflammation of the ear canal
- Contact dermatitis of the ear canal
- Ear fungus
- Ear myiasis, an extremely rare infestation of maggots
- Bone exposure, caused by the wearing away of skin in the canal
- Granuloma, a scar usually caused by tympanostomy tubes
- Stenosis, a gradual closing of the canal
- Foreign body in ear
- Cholesteatoma
- Ear mites in animals.
Earwax
Main article: Earwax
Earwax, also known as cerumen, is a yellowish, waxy substance secreted in the ear canals. It plays an important role in the human ear canal, assisting in cleaning and lubrication, and also provides some protection from bacteria, fungi, and insects. Excess or impacted cerumen can press against the eardrum and/or occlude the external auditory canal and impair hearing.
Additional images
-
Base of skull. Inferior surface.
-
Left infratemporal fossa.
-
External and middle ear, opened from the front. Right side.
-
Horizontal section through left ear; upper half of section.
See also
- List of specialized glands within the human integumentary system
References
- ^ hednk-022 — Embryo Images at University of North Carolina
External links
- Veterans Health Administration web site
- OSHA web site
- Continuing Medical Education Ear Photographs
- Otoscopy Tutorial w/ Images
- Roche Lexicon - illustrated navigator, at Elsevier 34257.000-1
Sensory system: Auditory and Vestibular systems (TA A15.3, TH 3.11.09, GA 10.1029)
|
|
Outer ear |
- Pinna (Helix, Antihelix, Tragus, Antitragus, Incisura anterior auris, Earlobe)
- Ear canal
- Auricular muscles
- Eardrum (Umbo
- Pars flaccida)
|
|
Middle ear |
Tympanic cavity
|
- Labyrinthine wall/medial: Oval window
- Round window
- Secondary tympanic membrane
- Prominence of facial canal
- Promontory of tympanic cavity
- Mastoid wall/posterior: Mastoid cells
- Aditus to mastoid antrum
- Pyramidal eminence
- Tegmental wall/roof: Epitympanic recess
|
|
Ossicles
|
- Malleus (Neck of malleus, Superior ligament of malleus, Lateral ligament of malleus, Anterior ligament of malleus)
- Incus (Superior ligament of incus, Posterior ligament of incus)
- Stapes (Anular ligament of stapes)
|
|
Muscles
|
|
|
Eustachian tube
|
- Bony part of pharyngotympanic tube
- Cartilage of pharyngotympanic tube (Torus tubarius)
|
|
|
Inner ear/
(membranous labyrinth,
bony labyrinth) |
Auditory system
Cochlear labyrinth
|
General cochlea
|
- Scala vestibuli
- Helicotrema
- Scala tympani
- Modiolus
- Cochlear cupula
|
|
Perilymphatic space
|
- Perilymph
- Cochlear aqueduct
|
|
Cochlear duct /
scala media
|
- Reissner's/vestibular membrane
- Basilar membrane
- Endolymph
- Stria vascularis
- Spiral ligament
- Organ of Corti: Stereocilia
- Tectorial membrane
- Sulcus spiralis (externus, internus)
- Spiral limbus
|
|
Cells
|
- Claudius cell
- Boettcher cell
|
|
|
Vestibular system/
Vestibular labyrinth
|
- Static/translations/vestibule/endolymphatic duct: Utricle (Macula)
- Saccule (Macula, Endolymphatic sac)
- Kinocilium
- Otolith
- Vestibular aqueduct
- Canalis reuniens
- Kinetic/rotations: Semicircular canals (Superior, Posterior, Horizontal)
- Ampullary cupula
- Ampullae (Crista ampullaris)
|
|
|
|
|
UpToDate Contents
全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.
English Journal
- Silicone impression material foreign body in the middle ear: Two case reports and literature review.
- Suzuki N1, Okamura K1, Yano T1, Moteki H1, Kitoh R1, Takumi Y1, Usami S2.
- Auris, nasus, larynx.Auris Nasus Larynx.2015 Oct;42(5):419-23. doi: 10.1016/j.anl.2015.03.010. Epub 2015 May 5.
- We report two cases of impression material foreign body in the middle ear. The first case had been affected with chronic otitis media. The silicone flowed into the middle ear through a tympanic membrane perforation during the process of making an ear mold. About 4 years and 8 months after, the patie
- PMID 25956272
- Anthropometry of external auditory canal by non-contactable measurement.
- Yu JF1, Lee KC2, Wang RH3, Chen YS3, Fan CC3, Peng YC4, Tu TH5, Chen CI6, Lin KY7.
- Applied ergonomics.Appl Ergon.2015 Sep;50:50-5. doi: 10.1016/j.apergo.2015.01.008. Epub 2015 Mar 16.
- Human ear canals cannot be measured directly with existing general measurement tools. Furthermore, general non-contact optical methods can only conduct simple peripheral measurements of the auricle and cannot obtain the internal ear canal shape-related measurement data. Therefore, this study uses th
- PMID 25959317
- Jugular bulb abnormalities in patients with Meniere's disease using high-resolution computed tomography.
- Park JJ1, Shen A, Keil S, Kuhl C, Westhofen M.
- European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery.Eur Arch Otorhinolaryngol.2015 Aug;272(8):1879-84. doi: 10.1007/s00405-014-2996-4. Epub 2014 Mar 20.
- Temporal bone abnormalities such as hypoplasia of the vestibular aqueduct or hypopneumatization of the mastoid have been described in Meniere's disease (MD). Jugular bulb abnormalities (JBA) are one of the most common temporal bone abnormalities. The aim of this study was to evaluate the frequency o
- PMID 24647494
Japanese Journal
- 外耳道疾患の画像診断 (特集 脳神経・頭頸部の診断と治療update)
- 前田 恭世,崎谷 恵理,吉原 俊雄
- 頭頸部外科 25(1), 67-71, 2015
- 今回われわれは第1鰓溝由来の鰓性瘻孔再発例を経験したので報告する。症例は2歳女児。出生時より右下顎の陥凹を認め,同部位の腫脹と感染を繰り返し,某病院形成外科で手術施行。耳側に向かう瘻管を認めたため,腫脹部のみの切除とデブリドマンで終了となり,その後も感染を繰り返していた。当科紹介され手術施行。瘻管は顔面神経内側を走行,外耳道軟骨に付着し盲端となっていた。病理では重層扁平上皮とともに皮膚付属器(毛包 …
- NAID 130005091169
- Moist wound healing に基づいて術式改良した鼓膜形成術(接着法)
- 堀 龍介,庄司 和彦,児嶋 剛,岡上 雄介,藤村 真太郎,奥山 英晃,小林 徹郎
- 天理医学紀要 18(1), 30-35, 2015
- 鼓膜穿孔閉鎖を目的とした鼓膜形成術は,湯浅らが報告した接着法が広く普及しているが,その穿孔閉鎖率は従来法の鼓膜形成術と比べると劣っている.穿孔が閉鎖しない原因は,術後の移植片のずれ・脱落による穿孔残存と,乾燥させることによる鼓膜上皮の創傷治癒遅延であると考えられる.褥瘡・皮膚潰瘍の治療において,最近まで乾かして治すという考えが一般的であったが,近年は湿らせて治すというmoist wound he …
- NAID 130005085463
Related Links
- External auditory canal, also called external auditory meatus, or external acoustic meatus, passageway that leads from the outside of the head to the tympanic membrane, or eardrum membrane, of each ear. The structure of the ...
- :the auditory canal leading from the opening of the external ear to the eardrum—called also external acoustic meatus, external auditory meatus ... Seen and Heard What made you want to look up external auditory canal? Please tell ...
Related Pictures
★リンクテーブル★
[★]
- 英
- external auditory meatus, external acoustic meatus (KH,HT), external auditory canal
- ラ
- meatus acusticus externus
- 同
- 外耳孔
- 関
- 内耳
[★]
外耳道
- 関
- external acoustic meatus、external auditory canal、external canal
[★]
外耳道
- 関
- ear canal、external acoustic meatus、external auditory canal
[★]
- (過去could)
- (可能)~できる、~しようと思えばできる、~する能力がある。
- (推量)~する可能性がある、~することがあり得る、~する/になることがある、~しない/にならないとも限らない。
- (許可)~してもよい、~しても差し支えない。
- 関
- able、feasible、possible
[★]
- 関
- exo、exterior、externally、extra、lateral、laterale、lateralis、laterally、outer、outside
[★]
- 関
- conduit、duct、ductal、ductus、meatus、pipe、tubal、tube、vas、vessel
[★]
- 関
- acoustic