Nonlinear temporal receptive fields of neurons in the dorsal cochlear nucleus

Sharba Bandyopadhyay, Eric D. Young

Research output: Contribution to journalArticle

Abstract

Studies of the dorsal cochlear nucleus (DCN) have focused on spectral processing because of the complex spectral receptive fields of the DCN. However, temporal fluctuations in natural signals convey important information, including information about moving sound sources or movements of the external ear in animals like cats. Here, we investigate the temporal filtering properties of DCN principal neurons through the use of temporal weighting functions that allow flexible analysis of nonlinearities and time variation in temporal response properties. First-order temporal receptive fields derived from the neurons are sufficient to characterize their response properties to low-contrast (3-dB standard deviation) stimuli. Larger contrasts require the second-order terms. Allowing temporal variation of the parameters of the first-order model or adding a component representing refractoriness improves predictions by the model by relatively small amounts. The importance of second-order components of the model is shown through simulations of nonlinear envelope synchronization behavior across sound level. The temporal model can be combined with a spectral model to predict tuning to the speed and direction of moving sounds.

Original languageEnglish (US)
Pages (from-to)2414-2425
Number of pages12
JournalJournal of neurophysiology
Volume110
Issue number10
DOIs
StatePublished - Nov 15 2013

Keywords

  • Dorsal cochlear nucleus
  • Envelope processing
  • Moving sounds
  • Receptive field
  • Spectral notches
  • Synchronization
  • Temporal contrast
  • Temporal model

ASJC Scopus subject areas

  • Neuroscience(all)
  • Physiology

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