Longitudinal Vibrations in the Organ of Corti are Limited to Its Core.

ABSTRACT:

Purpose

The goal of this research was to determine where in the organ of Corti (ooC) sound-induced, longitudinal vibrations occur, and how they depend on the health of the cochlea.

Methods

Sound-evoked vibrations of the ooC in the cochlea's middle turn of adult anesthetized gerbils were measured using optical coherence tomography (OCT). Vibratory responses, evoked with acoustic tone complexes, were recorded at multiple, closely spaced (20 μm), tonotopic locations which changed the "viewing angle" of the vertical OCT beam re. the longitudinal motion. After spatial alignment of the responses, within-ooC regions exhibiting sound-induced longitudinal motion were identified from a conspicuous 180° phase flip.

Results

Longitudinal motion was restricted to the outer hair cel

SUBMITTER: Meenderink SWF 

PROVIDER: S-EPMC12698914 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature