Basilar membrane nonlinearity and its influence on auditory nerve rate-intensity functions☆
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A simplified physiological model of rate-level functions of auditory-nerve fibers
2021, Hearing ResearchCitation Excerpt :Fig. 2C shows the driven rate (the difference between the mean rate and the spontaneous rate) for the rate-level functions in Fig. 2A and B. At low stimulus levels (here, less than approximately 20 or 30 dB SPL), the driven rate grows with the square of the stimulus amplitude (i.e., by 2 dB/dB) irrespective of spontaneous rate, consistent with the rate-additivity model with an exponent of α = 2 (e.g., Yates et al., 1990; Yates, 1990; Müller et al., 1991). However, at higher stimulus levels, the driven rate grows more steeply for functions with low spontaneous rates, consistent with observations of Eatock et al. (1991) and Heil et al. (2011).
Nelson's notch in the rate-level functions of auditory-nerve fibers might be caused by PIEZO2-mediated reverse-polarity currents in hair cells
2019, Hearing ResearchCitation Excerpt :The location matches that suggested earlier (Kim et al., 2013; Marcotti et al., 2014; Beurg et al., 2016) for the channels mediating the reverse-polarity current. Indeed, Wu et al. (2017) showed that PIEZO2 is required for the reverse-polarity current, as such currents were undetectable in the vast majority of hair cells in Piezo2-cko and Piezo1/2-dcko mice. Notably, the PIEZO2-mediated reverse-polarity current is suppressed by elevating the intracellular Ca2+ concentration.
Compression in the Auditory System
2023, Neuroscience and Behavioral PhysiologyCochlear aging disrupts the correlation between spontaneous rate and sound-level coding in auditory nerve fibers
2023, Journal of NeurophysiologyRepresentations of fricatives in subcortical model responses: Comparisons with human consonant perceptiona)
2023, Journal of the Acoustical Society of America
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Portions of this work were reported at the Boden Research Conference, Thredbo, New South Wales, Australia, February 1–3, 1989.