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  Binaural Interaction in the Nucleus Laminaris of the Barn Owl : A Quantitative Model

Grün, S., Wagner, H., Carr, C., & Aertsen, A.(1991). Binaural Interaction in the Nucleus Laminaris of the Barn Owl: A Quantitative Model (1991-01).

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-95F7-B Version Permalink: http://hdl.handle.net/21.11116/0000-0006-95F8-A
Genre: Report

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Research-Report-BrainWorks-1991-Gruen.pdf (Any fulltext), 800KB
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Research-Report-BrainWorks-1991-Gruen.pdf
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 Creators:
Grün, S1, 2, Author              
Wagner, H1, 2, Author              
Carr, C, Author
Aertsen, A2, 3, Author              
Affiliations:
1Former Department Comparative Neurobiology, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497800              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              
3Former Department Structure and Function of Natural Nerve-Net , Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497803              

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 Abstract: A quantitative, neuronal model is proposed for the computation of interaural time difference (ITD) in the auditory system of the barn owl. The model uses a general, probabilistic approach, and is composed of two stages, the characteristics of which are based on anatomical and physiological evidence. Excitatory inputs from both ears, phase-locked to the waveform of tonal stimuli, together with phase-independent inhibitory inputs are summated linearly. The result is transformed into a probability of spike generation by a sigmoid nonlinearity, constituting a stochastic, ’soft’ threshold with saturation. The model incorporates inhibition as a control parameter on the nonlinearity, and includes the usual crosscorrelation-type models as a special case. It has a minimum number of parameters, the values of which can be estimated from physiological data in a straightforward manner. This simple, general model accounts for the binaural response properties of physiologically recorded neurons. In particular, it explains the experimentally observed ITD-tuning and the increase of phase-locking from input to output neurons. The model predicts that a decrease in inhibition causes a non-monotonic change in sensitivity to ITD.

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 Dates: 1991-07
 Publication Status: Published in print
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 Identifiers: Report Nr.: 1991-01
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Title: Albert-Ludwigs-Universität: Institute for Biology 3, Neurobiology & Biophysics
Place of Event: Freiburg i.Br., Germany
Start-/End Date: 1991-07-05

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Title: Research Report BrainWorks
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Publ. Info: 01
Pages: - Volume / Issue: 1991 Sequence Number: - Start / End Page: 1 - 11 Identifier: ISSN: 1615-2042