Scala vestibuli

(anatomy) The uppermost channel of the cochlea; filled with perilymph.

Scala vestibuli
The cochlea and vestibule, viewed from above.
Cross section of the cochlea.
Gray's	subject #232 1050

Scala vestibuli is a perilymph filled cavity inside the cochlea of the inner ear.

It is separated from the scala media by Reissner's membrane and extends from the oval window to the helicotrema where it joins scala tympani.

Additional images

Transverse section of the cochlear duct of a fetal cat.

Interior of right osseous labyrinth.

Diagrammatic longitudinal section of the cochlea.

External links

• Slide from University of Kansas
• Diagram at IUPUI
• Image at University of New England, Maine

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v • d • e Sensory system: Auditory and Vestibular systems (TA A15.3, GA 10.1029) Auditory Outer ear Pinna (Helix, Antihelix, Tragus, Antitragus, Earlobe) • Ear canal Middle ear Eardrum (Umbo) • Ossicles (Malleus, Incus & Stapes) • muscles (Stapedius, Tensor tympani) • Eustachian tube (Torus tubarius) Inner ear/Labyrinth Vestibule • Membranous labyrinth Oval window → Scala vestibuli / Reissner's/vestibular membrane, Helicotrema and Scala tympani / Basilar membrane (Perilymph) → Round window Cochlea: Modiolus • Cochlear duct / scala media (Endolymph, Stria vascularis, Spiral ligament), Olivocochlear system Organ of Corti: Stereocilia • Tectorial membrane • Sulcus spiralis (externus, internus) • Limbus spiralis To brain Hair cells → Spiral ganglion → Cochlear nerve VIII → Cochlear nuclei → Trapezoid body → Superior olivary nuclei → Lateral lemniscus → Inferior colliculi → Medial geniculate nuclei → Acoustic radiation → Primary auditory cortex Vestibular Inner ear/Labyrinth Static/translations: Utricle (Macula) · Saccule (Macula, Endolymphatic sac, Endolymphatic duct) · Kinocilium · Otolith Kinetic/rotations: Semicircular canals (Superior, Posterior, Horizontal) • Cupula • Ampullae (Crista ampullaris) To brain Vestibular nerve VIII → Vestibular nuclei, Flocculonodular lobe Vestibular nuclei → Vestibulospinal tract, Ventral posterolateral nucleus → Vestibular cortex ear navs: anat/physio/dev, noncongen/congen, eponymous signs, proc

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