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Cochlear and Neural Delays for Coincidence Detection in Owls

Peña, José Luis and Viete, Svenja and Funabiki, Kazuo and Saberi, Kourosh and Konishi, Masakazu (2001) Cochlear and Neural Delays for Coincidence Detection in Owls. Journal of Neuroscience, 21 (23). pp. 9455-9459. ISSN 0270-6474. PMCID PMC6763915. doi:10.1523/JNEUROSCI.21-23-09455.2001.

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The auditory system uses delay lines and coincidence detection to measure the interaural time difference (ITD). Both axons and the cochlea could provide such delays. The stereausis theory assumes that differences in wave propagation time along the basilar membrane can provide the necessary delays, if the coincidence detectors receive input from fibers innervating different loci on the left and right basilar membranes. If this hypothesis were true, the left and right inputs to coincidence detectors should differ in their frequency tuning. The owl's nucleus laminaris contains coincidence detector neurons that receive input from the left and right cochlear nuclei. Monaural frequency-tuning curves of nucleus laminaris neurons showed small interaural differences. In addition, their preferred ITDs were not correlated with the interaural frequency mismatches. Instead, the preferred ITD of the neuron agrees with that predicted from the distribution of axonal delays. Thus, there is no need to invoke mechanisms other than neural delays to explain the detection of ITDs by the barn owl's laminaris neurons.

Item Type:Article
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Additional Information:© 2001 Society for Neuroscience. For the first six months after publication SfN’s license will be exclusive. Beginning six months after publication the Work will be made freely available to the public on SfN’s website to copy, distribute, or display under a Creative Commons Attribution 4.0 International (CC BY 4.0) license ( Received Jan. 4, 2001; revised Sept. 7, 2001; accepted Sept. 13, 2001. This work was supported by National Institute of Neurological Disorders and Stroke Grant DC-00134 and by postdoctoral fellowships from the Deutsche Forschungsgemeinschaft (S.V.) and the Pew Latin American Fellows Program (J.L.P.). We thank Christine Köppl for generously sharing data with us; Yehuda Albeck, Jamie Mazer, Chris Malek, and Ben Arthur for their help with computer programming; Catherine Carr for reviewing an early draft of the manuscript; and Mario Ruggero for discussion about cochlear mechanisms.
Funding AgencyGrant Number
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Pew Latin American Fellows ProgramUNSPECIFIED
Subject Keywords:owl; nucleus laminaris; frequency tuning; coincidence detection; delay lines; sound localization; stereausis
Issue or Number:23
PubMed Central ID:PMC6763915
Record Number:CaltechAUTHORS:20151201-101518661
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Official Citation:Cochlear and Neural Delays for Coincidence Detection in Owls José Luis Peña, Svenja Viete, Kazuo Funabiki, Kourosh Saberi, and Masakazu Konishi The Journal of Neuroscience, 1 December 2001, 21(23):9455-9459
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62493
Deposited By: Ruth Sustaita
Deposited On:01 Dec 2015 18:54
Last Modified:10 Nov 2021 23:03

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