Wiener-Kernel analysis of responses to noise of chinchilla auditory-nerve fibers

Alberto Recio-Spinoso, Andrei N. Temchin, Pim Van Dijk, Yun Hui Fan, Mario Alfredo Ruggero*

*Corresponding author for this work

Research output: Contribution to journalArticle

87 Scopus citations

Abstract

Responses to broadband Gaussian white noise were recorded in auditory-nerve fibers of deeply anesthetized chinchillas and analyzed by computation of zeroth-, first-, and second-order Wiener kernels. The first-order kernels (similar to reverse correlations or "revcors") of fibers with characteristic frequency (CF) <2 kHz consisted of lightly damped transient oscillations with frequency equal to CF. Because of the decay of phase locking strength as a function of frequency, the signal-to-noise ratio of first-order kernels of fibers with CFs >2 kHz decreased with increasing CF at a rate of about -18 dB per octave. However, residual first-order kernels could be detected in fibers with CF as high as 12 kHz. Second-order kernels, 2-dimensional matrices, reveal prominent periodicity at the CF frequency, regardless of CF. Thus onset delays, frequency glides, and near-CF group delays could be estimated for auditory-nerve fibers innervating the entire length of the chinchilla cochlea.

Original languageEnglish (US)
Pages (from-to)3615-3634
Number of pages20
JournalJournal of neurophysiology
Volume93
Issue number6
DOIs
StatePublished - Jun 1 2005

ASJC Scopus subject areas

  • Neuroscience(all)
  • Physiology

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