The cochlear aqueduct is a narrow bony channel connecting the perilymph of the scala tympani near the round window to the subarachnoid space at the base of the skull.
| Location | Petrous temporal bone, from the basal turn of the cochlea to near the jugular foramen |
|---|---|
| Parts |
|
| Nerve Supply | None of importance |
| Blood Supply | Vein of the cochlear aqueduct; Labyrinthine artery branches |
Connects perilymph with cerebrospinal fluid, helping balance pressure.
A wide aqueduct may allow pressure changes from the skull to reach the inner ear, and is relevant to perilymph gushers during cochlear implant or stapes surgery. Meningitis can spread to the cochlea along it, causing hearing loss.
Inner ear damage from meningitis, sometimes with bony obliteration of the cochlea.
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