Jump to content

Main menu Navigation ●Main page ●Contents ●Current events ●Random article ●About Wikipedia ●Contact us ●Donate Contribute ●Help ●Learn to edit ●Community portal ●Recent changes ●Upload file

●Create account ●Log in ●Create account ● Log in Pages for logged out editors learn more ●Contributions ●Talk

(Top) 1 Structure 2 Function 3 References 4 External links

Stria vascularis of cochlear duct

●Deutsch ●Македонски Edit links ●Article ●Talk ●Read ●Edit ●View history Tools Actions ●Read ●Edit ●View history General ●What links here ●Related changes ●Upload file ●Special pages ●Permanent link ●Page information ●Cite this page ●Get shortened URL ●Download QR code ●Wikidata item Print/export ●Download as PDF ●Printable version Appearance From Wikipedia, the free encyclopedia

Stria vascularis of cochlear duct
Cross section of the cochlea.
Details
System	Cochlea
Identifiers
Latin	stria vascularis ductus cochlearis
MeSH	D013316
NeuroLexID	birnlex_2525
TA98	A15.3.03.096
TA2	7028
FMA	77832
Anatomical terminology [edit on Wikidata]

The stria vascularis of the cochlear duct is a capillary loop in the upper portion of the spiral ligament (the outer wall of the cochlear duct or scala media). It produces endolymph for the scala media in the cochlea.

Structure[edit]

The stria vascularis is part of the lateral wall of the cochlear duct.^[1] It is a somewhat stratified epithelium containing primarily three cell types:

marginal cells,^[1] which are involved in K⁺ transport, and line the endolymphatic space of the scala media.
intermediate cells,^[1] which are pigment-containing cells scattered among capillaries.
basal cells,^[1] which separate the stria vascularis from the underlying spiral ligament.^[2] They are connected to basal cells with gap junctions.^[1]

The stria vascularis also contains pericytes, melanocytes, and endothelial cells.^[3]^: 2380 It also contains intraepithelial capillaries - it is the only epithelial tissue that is not avascular (completely lacking blood vessels and lymphatic vessels).^{[citation needed]}

Function[edit]

The stria vascularis produces endolymph for the scala media, one of the three fluid-filled compartments of the cochlea.^[4] This maintains the ion balance of the endolymph that surround inner hair cells and outer hair cells of the organ of Corti.^[4] It secretes lots of K⁺,^[1]^[4] and may also secrete H⁺.^[1]

References[edit]

This article incorporates text in the public domain from page 1055 of the 20th edition of Gray's Anatomy (1918)

^ ^a ^b ^c ^d ^e ^f ^g Marcus, Daniel C. (2012). "37 - Acoustic Transduction". Cell Physiology Source Book (4th ed.). Academic Press. pp. 649–668. doi:10.1016/B978-0-12-387738-3.00037-8. ISBN 978-0-12-387738-3.

^ Ross, Michael H. Histology : a text and atlas / Michael H. Ross, Wojech Pawlina., -6th ed. p 940.

^ Laiwani, Anil K.; Qian, Z. Jason (2021). "Chapter 150: Pharmacologic and Molecular Therapies of the Cochlear and Vestibular Labirynths". In Flint, Paul W.; Francis, Howard W.; Haughey, Bruce H.; Lesperance, Marci M.; Lund, Valerie J.; Robbins, K. Thomas; Thomas, J. Regan (eds.). Cummings Otolaryngology: Head and Neck Surgery (Seventh ed.). pp. 2380–2395.e5. ISBN 978-0-323-61179-4.