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• W2331690169 abstract "The spatio-temporal pattern of auditory nerve (AN) activity, representing the relative timing of spikes across the tonotopic axis, contains cues to perceptual features of sounds such as pitch, loudness, timbre, and spatial location. These spatio-temporal cues may be extracted by neurons in the cochlear nucleus (CN) that are sensitive to relative timing of inputs from AN fibers innervating different cochlear regions. One possible mechanism for this extraction is “cross-frequency” coincidence detection (CD), in which a central neuron converts the degree of coincidence across the tonotopic axis into a rate code by preferentially firing when its AN inputs discharge in synchrony. We used Huffman stimuli (Carney LH. J Neurophysiol 64: 437–456, 1990), which have a flat power spectrum but differ in their phase spectra, to systematically manipulate relative timing of spikes across tonotopically neighboring AN fibers without changing overall firing rates. We compared responses of CN units to Huffman stimuli with responses of model CD cells operating on spatio-temporal patterns of AN activity derived from measured responses of AN fibers with the principle of cochlear scaling invariance. We used the maximum likelihood method to determine the CD model cell parameters most likely to produce the measured CN unit responses, and thereby could distinguish units behaving like cross-frequency CD cells from those consistent with same-frequency CD (in which all inputs would originate from the same tonotopic location). We find that certain CN unit types, especially those associated with globular bushy cells, have responses consistent with cross-frequency CD cells. A possible functional role of a cross-frequency CD mechanism in these CN units is to increase the dynamic range of binaural neurons that process cues for sound localization." @default.
• W2331690169 created "2016-06-24" @default.
• W2331690169 creator A5001136846 @default.
• W2331690169 creator A5013150142 @default.
• W2331690169 date "2012-12-15" @default.
• W2331690169 modified "2023-09-26" @default.
• W2331690169 title "Sensitivity of cochlear nucleus neurons to spatio-temporal changes in auditory nerve activity" @default.
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• W2331690169 doi "https://doi.org/10.1152/jn.00160.2012" @default.
• W2331690169 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3544887" @default.
• W2331690169 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22972956" @default.
• W2331690169 hasPublicationYear "2012" @default.
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