Vestibular aqueduct
| 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. 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.