Factors that influence rate-versus-intensity relations in single cochlear nerve fibers of the gerbil

Kevin K. Ohlemiller, Stephen M. Echteler, Jonathan H. Siegel

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The relationship between characteristic frequency (CF) and rate-intensity curve shape was examined in 144 cochlear nerve fibers obtained from 39 Mongolian gerbils. Quasi-steady-state firing rates were measured in response to tone bursts at the CF. From each intensity curve, estimates of slope, firing rate at saturation, and dynamic range were derived using nonlinear curve fitting. Saturation firing rate was depressed for stimuli with a high duty cycle, especially for units with low rates of spontaneous discharge. The distributions of slope and saturation firing rate differed for fibers with CFs above and below 3 to 4 kHz. The interrelation of slope, dynamic range, maximum driven rate, and spontaneous firing rate was also different for fibers with CFs above and below this band. This mid-CF transition is discussed in terms of possible longitudinal changes in the function of the gerbil cochlea.

Original languageEnglish
Pages (from-to)274-287
Number of pages14
JournalJournal of the Acoustical Society of America
Volume90
Issue number1
DOIs
StatePublished - Jul 1991

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