Position of the Internal Aperture of Vestibular Aqueduct in Patients With Enlarged Vestibular Aqueduct

Abstract

The common crus is shorter in EVA patients than in control subjects. The internal aperture of the vestibular aqueduct opens solely into the common crus in control subjects. It opens simultaneously into the common crus and vestibule in almost half of the EVA patients. The EVA patients whose internal apertures of vestibular aqueducts open solely into the common crus may have better hearing than those whose internal apertures open simultaneously into the common crus and vestibule.

Genetic Determinants of Non-Syndromic Enlarged Vestibular Aqueduct: A Review

“…The vestibular aqueduct (VA) is a bony canal located within the human temporal bone and contains parts of the endolymphatic duct (ED)—the isthmus and the rugose portion, which are part of the membranous labyrinth of the inner ear ( Figure 1 ) [ 16 ]. The medial, internal aperture opens into the common crus of the posterior and superior (anterior) semicircular canals [ 17 ], close to the vestibule. From this aperture, the canal runs latero-posteriorly in a J-shaped manner up to its external aperture, also referred to as operculum , towards the posterior cranial fossa on the backside of the temporal bone.…”