| Vestibular aqueduct | |
|---|---|
 Interior of right osseous labyrinth. | |
 The cochlea and vestibule, viewed from above. (Aquaeductus vestibuli labeled at bottom right.) | |
| Details | |
| Identifiers | |
| Latin | aquaeductus vestibuli |
| MeSH | D014723 |
| TA98 | A15.3.03.057 |
| TA2 | 6940 |
| FMA | 77821 |
| Anatomical terminology | |
At the posterior lateral wall of the temporal bone is the vestibular aqueduct, which extends to the posterior surface of the petrous portion of the temporal bone.[1] The vestibular aqueduct parallels the petrous apex, in contrast to the cochlear aqueduct, which lies perpendicular to the petrous apex.
It transmits a small vein, and contains a tubular prolongation of the membranous labyrinth, the ductus endolymphaticus, which ends in a cul-de-sac, the endolymphatic sac, between the layers of the dura mater within the cranial cavity.