Scala vestibuli
Sensory (eye & ear)OrgansHeadLeft and right
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- What it is
- The upper perilymph-filled channel of the cochlea, running from the oval window to the apex above the cochlear duct, from which it is separated by the very thin Reissner's (vestibular) membrane.
- Function
- Carries the pressure wave from the stapes footplate toward the apex.
- Size
- Follows all 2.5 turns; joins the scala tympani through the helicotrema at the apex.
- Clinical note
- Perilymph resembles cerebrospinal fluid (sodium-rich) and communicates with the subarachnoid space through the cochlear aqueduct.