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Tympanic duct
Inner ear, with tympanic duct labeled near bottom.
Cross section of the cochlea (scala tympani labeled at bottom)
Details
Identifiers
Latin
scala tympani
MeSH
D012533
TA98
A15.3.03.045
TA2
6970
FMA
61272
Anatomical terminology
[edit on Wikidata]
The tympanic duct or scala tympani is one of the perilymph-filled cavities in the inner ear of humans. It is separated from the cochlear duct by the basilar membrane, and it extends from the round window to the helicotrema, where it continues as vestibular duct.
The purpose of the perilymph-filled tympanic duct and vestibular duct is to transduce the movement of air that causes the tympanic membrane and the ossicles to vibrate, to movement of liquid and the basilar membrane. This movement is conveyed to the organ of Corti inside the cochlear duct, composed of hair cells attached to the basilar membrane and their stereocilia embedded in the tectorial membrane. The movement of the basilar membrane compared to the tectorial membrane causes the stereocilia to bend. They then depolarise and send impulses to the brain via the cochlear nerve. This produces the sensation of sound.
The tympanicduct or scala tympani is one of the perilymph-filled cavities in the inner ear of humans. It is separated from the cochlear duct by the basilar...
cochlear duct (a.k.a. the scala media) is an endolymph filled cavity inside the cochlea, located between the tympanicduct and the vestibular duct, separated...
the cochlear duct by Reissner's membrane and extends from the vestibule of the ear to the helicotrema where it joins the tympanicduct. The cochlea and...
vestibular duct or scala vestibuli (containing perilymph), which lies superior to the cochlear duct and abuts the oval window the tympanicduct or scala...
consists of three fluid-filled spaces: the vestibular duct, the cochlear duct, and the tympanicduct. Hair cells responsible for transduction—changing mechanical...
duct. At one end of each of the semicircular ducts is a dilated sac called an membranous ampulla, which is more than twice the diameter of the ducts....
media of the cochlea of the inner ear between the vestibular duct and the tympanicduct and is composed of mechanosensory cells, known as hair cells....
the endolymph (scala media, +80 mV) and the perilymph (vestibular and tympanicducts, 0 mV). EP is highest in the basal turn of the cochlea (95 mV in mice)...
bulges in.[citation needed] Vestibular and tympanicducts are filled with perilymph, and the smaller cochlear duct between them is filled with endolymph,...
to be analogous to the vestibular duct, whereas the posterior part is analogous to the recess for the tympanicduct. "Glossary". Palaeos. Retrieved 25...
glossopharyngeal nerve (CN IX), then pass in the tympanic nerve to the tympanic plexus, then from the tympanic plexus in the lesser petrosal nerve to the otic...
well-preserved DNA. The base is fused with the internal surfaces of the squamous, tympanic, and mastoid parts. The apex, which is rough and uneven, is received into...
mechanical vibrations by the three auditory ossicles. Pressure waves move the tympanic membrane which in turns moves the malleus, the first bone of the middle...
the same from top to bottom, and about 3 mm across. In its lateral or tympanic wall is the oval window, closed, in the fresh state, by the base of the...
aggressive surgical interventions such as Stensen’s duct ligation, superficial or total parotidectomy, and tympanic neurectomy. Nowadays, the disease is managed...
is drained Inferior tympanic canaliculus, the passage for the tympanic branch of the glossopharyngeal nerve and inferior tympanic artery Foramen petrosum...
most of the tympanic cavity of the middle ear, and all of the Eustachian or auditory tube. The narrow auditory tube connects the tympanic cavity to the...
skin on her face, and her eyelashes and nose hair remained intact. The tympanic membrane of her left ear was also intact, and her finger and toe prints...
needed] Availability of less invasive temperature-taking methods including tympanic (ear) and forehead thermometers has facilitated reduced use of this method...
the immediate post op period Vomiting Perilymph gush Floating foot plate Tympanic membrane tear Dead labyrinth Perilymph fistula Labyrinthitis Granuloma...
deep layer was described as attaching superiorly to the mandible, and the tympanic plate, styloid process and mastoid process of the temporal bone. The parotid...
of the bony part of the external acoustic meatus in the vicinity of the tympanic membrane. It is normally closed in adults. In 1829 Huschke described the...
(cranial nerve VII and IX), ottic in inner ear space (cranial nerve IX) tympanic nerve of VII with C9, C10, C5 (cranial nerves VII, XI, X, V) in promontory...
The rest of the outer ear has bent canals that lead to the eardrum or tympanic membrane. The middle ear, separated by the outer eardrum in the back of...
Global Information
