Model-based estimation of the frequency tuning of the inner-hair-cell stereocilia from neural tuning curves

Alessandro Altoè, Ville Pulkki, Sarah Verhulst

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
170 Downloads (Pure)

Abstract

This study proposes that the frequency tuning of the inner-hair-cell (IHC) stereocilia in the intact organ of Corti can be derived from the responses of the auditory fibers (AFs) using computational tools. The frequency-dependent relationship between the AF threshold and the amplitude of the stereocilia vibration is estimated using a model of the IHC-mediated mechanical to neural transduction. Depending on the response properties of the considered AF, the amplitude of stereocilia deflection required to drive the simulated AF above threshold is 1.4 to 9.2 dB smaller at low frequencies (≤500 Hz) than at high frequencies (≥4 kHz). The estimated frequency-dependent relationship between ciliary deflection and neural threshold is employed to derive constant-stereocilia-deflection contours from previously published AF recordings from the chinchilla cochlea. This analysis shows that the transduction process partially accounts for the observed differences between the tuning of the basilar membrane and that of the AFs.

Original languageEnglish
Pages (from-to)4438-4451
Number of pages14
JournalJournal of the Acoustical Society of America
Volume141
Issue number6
DOIs
Publication statusPublished - 1 Jun 2017
MoE publication typeA1 Journal article-refereed

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