外耳道
WordNet
- the flesh of animals (including fishes and birds and snails) used as food
- a natural body passageway
- a nonresident doctor or medical student; connected with a hospital but not living there (同)medical extern
PrepTutorEJDIC
- (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』》
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/02/12 10:27:46」(JST)
[Wiki en表示]
| External acoustic meatus |
|
Anatomy of the human ear.
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| Details |
| Latin |
meatus acusticus externus |
| Precursor |
groove (cleft) of the first branchial arch.[1] |
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Artery
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anterior part: superficial temporal artery
posterior part: posterior auricular artery |
|
Vein
|
superficial temporal veins, external jugular vein, pterygoid plexus |
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Nerve
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auriculotemporal nerve, great auricular nerve, auricular branch of vagus nerve |
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Lymph
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superficial cervical lymph nodes, deep cervical lymph nodes |
| Identifiers |
| Gray's |
p.1036 |
Dorlands
/Elsevier |
m_06/12518132 |
| Anatomical terminology |
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 2.5 centimetres (1 in) in length and 0.7 centimetres (0.3 in) 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 elastic cartilage 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 2.5 centimetres (1 in) long and 0.7 centimetres (0.28 in) in diameter.[2] 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
Due to its relative exposure to the outside world, the ear canal is susceptible to diseases and other disorders. Some disorders include:
- Atresia of the ear canal
- Bone exposure, caused by the wearing away of skin in the canal
- Cholesteatoma
- Contact dermatitis of the ear canal
- Ear fungus
- Ear mites in animals
- Ear myiasis, an extremely rare infestation of maggots
- Foreign body in ear
- Granuloma, a scar usually caused by tympanostomy tubes
- Otitis externa (swimmer's ear), bacteria-caused inflammation of the ear canal
- Stenosis, a gradual closing of the canal
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, causing conductive hearing loss.
Additional images
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Base of skull. Inferior surface.
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Left infratemporal fossa.
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External and middle ear, opened from the front. Right side.
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Horizontal section through left ear; upper half of section.
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Lateral head anatomy detail.Facial nerve dissection.
See also
- List of specialized glands within the human integumentary system
References
- ^ hednk-022 — Embryo Images at University of North Carolina
- ^ Faddis, B. T. (2008). "Structural and functional anatomy of the outer and middle ear". In W. Clark & K. Ohlemiller (Eds.), Anatomy and physiology of hearing for audiologists (pp. 93–108). Thomson Delmar Learning.
External links
- Veterans Health Administration web site
- OSHA web site
- Continuing Medical Education Ear Photographs
- Otoscopy Tutorial w/ Images
- Anatomy diagram: 34257.000-1 at Roche Lexicon - illustrated navigator, Elsevier
|
Anatomy of hearing and balance
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|
| Outer ear |
- Auricle (Helix, Antihelix, Tragus, Antitragus, Incisura anterior auris, Earlobe)
- Ear canal
- Auricular muscles
- Eardrum
|
|
| Middle ear |
|
Tympanic cavity
|
- Medial structures
- Oval window
- Round window
- Secondary tympanic membrane
- Prominence of facial canal
- Promontory of tympanic cavity
- Posterior structures
- Mastoid cells
- Aditus to mastoid antrum
- Pyramidal eminence
|
|
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Ossicles
|
- Malleus
- superior ligament
- lateral ligament
- anterior ligament
- Incus
- Superior ligament
- Posterior ligament
- Stapes
- Muscles
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|
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Eustachian tube
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|
|
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Inner ear/
(membranous labyrinth,
bony labyrinth) |
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Auditory system
Cochlear labyrinth
|
|
General cochlea
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- Vestibular duct
- Helicotrema
- Tympanic duct
- Modiolus
- Cochlear cupula
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|
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Perilymphatic space
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- Perilymph
- Cochlear aqueduct
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|
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Cochlear duct /
scala media
|
- Reissner's/vestibular membrane
- Basilar membrane
- Reticular membrane
- Endolymph
- Stria vascularis
- Spiral ligament
- Organ of Corti: Stereocilia, Tip links
- Tectorial membrane
- Sulcus spiralis (externus, internus)
- Spiral limbus
|
|
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Cells
|
- Claudius cell
- Boettcher cell
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|
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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)
|
|
|
|
|
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| Description |
- Anatomy
- Physiology
- Development
|
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| Disease |
- Congenital
- Other
- Symptoms and signs
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| Treatment |
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UpToDate Contents
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English Journal
- Functional results after Bonebridge implantation in adults and children with conductive and mixed hearing loss.
- Rahne T1, Seiwerth I2, Götze G2, Heider C2, Radetzki F3, Herzog M2, Plontke SK2.
- 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 Nov;272(11):3263-9. doi: 10.1007/s00405-014-3403-x. Epub 2014 Nov 26.
- In patients with conductive hearing loss caused by middle ear disorders or atresia of the ear canal, a Bonebridge implantation can improve hearing by providing vibratory input to the temporal bone. The expected results are improved puretone thresholds and speech recognition. In the European Union, a
- PMID 25425039
- The utility of minimally invasive transcanal endoscopic approach for removal of residual/recurrent cholesteatoma: preliminary results.
- Migirov L1, Yakirevitch A2, Wolf M2.
- 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 Nov;272(11):3241-6. doi: 10.1007/s00405-014-3402-y. Epub 2014 Nov 21.
- To investigate the feasibility of applying the transcanal endoscopic approach (TEA) for surgical treatment of residual/recurrent cholesteatoma and present the preliminary results of 17 revision procedures that were carried out with this minimally invasive approach. The records of 17 patients (aged 5
- PMID 25413019
- Vestibular-evoked myogenic potentials and subjective visual vertical testing in patients with vitamin D deficiency/insufficiency.
- Sanyelbhaa H1, Sanyelbhaa A2.
- 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 Nov;272(11):3233-9. doi: 10.1007/s00405-014-3395-6. Epub 2014 Nov 20.
- Otolith function in subjects with vitamin D deficiency/insufficiency is investigated through vestibular-evoked myogenic potentials (VEMP) and subjective visual vertical (SVV) testing. The study group included 62 patients with vitamin D deficiency/insufficiency (30 females, 32 males), with age range
- PMID 25411075
Japanese Journal
- ニホンカモシカ(Capricornis crispus)の骨格に関する研究-4-頭蓋(頭蓋骨・顔面骨)について
- 松尾 信一,森下 芳臣
- 信州大学農学部紀要 22(2), p99-138, 1985-12
- … petrous part, mastoid process, tympanic bulla, external acoustic meatus, foramen lacerum, temporal crest, zygomatic process, mandibula fossa. … foramen lacerum, meatus temporalis, foramen retroarticulare, porus acusticus externus, porus acusticus internus, canalis musculotubarius, foramen stylomastoideum, canalis facialis, canaliculus tympanicus. …
- NAID 120005459972
- 動物園諸動物の病理解剖学的所見 : (I) Sus scrofa bucomystax (いのしし)の半頭蓋畸型児の二例
- 高野 義臣,森友 忠生,浦郷 篤史,金子 義郎
- 九州齒科學會雜誌 : Kyushu-Shika-Gakkai-zasshi 12(2), 147-150, 1958-09-30
- … Patho-anatomical findings were, a) aplasia of facial portion, b) aplasia of os lacrimale, os nasale, c) hypoplasia of mandibular and maxilla, d) aplasia of meatns acusticus externus, e) aplasia of eyes, nose and mouth, f) trace of right auricula, g) splenomegalia, h) Adhesion of entrails, i) fibromatous nodules in pylorus. …
- NAID 110003008952
- 竹久 正己
- 京都府立医科大学雑誌 36(1/2/3/4), 569-629, 1942
- … facialis, Sulcus sigmoides, Fossa cranii media und Meatus acusticus externus. …
- NAID 110007120377
Related Links
- 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 ...
- Definition of Meatus acusticus externus in the Online Dictionary. Meaning of Meatus acusticus externus. Pronunciation of Meatus acusticus externus. Translations of Meatus acusticus externus. Meatus acusticus externus synonyms, Meatus ...
★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
[★]
道
- 関
- canal、duct、ductal、ductus、pipe、street、tubal、tube、vas
[★]
- 関
- flesh