The scala vestibuli is the upper perilymph-filled channel of the cochlea. It begins at the vestibule, near the oval window, and spirals up to the helicotrema. It is separated from the cochlear duct below by the thin vestibular (Reissner) membrane.
| Location | Upper channel of the cochlea, above the vestibular membrane |
|---|---|
| Parts |
|
| Nerve Supply | None directly |
| Blood Supply | Cochlear branches of the labyrinthine artery |
Carries sound-induced pressure waves from the oval window toward the cochlear apex.
Pressure waves from the stapes enter the cochlea through the scala vestibuli. It is sometimes used as an alternative route for cochlear implant electrode insertion when the scala tympani is blocked by new bone after meningitis.
New bone forming inside the cochlear scalae after meningitis, which can block the usual scala tympani route for implants.
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