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Changing Roles for Temporal Representation of Odorant During the Oscillatory Response of the Olfactory Bulb.

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Title: Changing Roles for Temporal Representation of Odorant During the Oscillatory Response of the Olfactory Bulb.
Authors: Soyoun Kim, Singer, Benjamin H., Zochowski, Michal
Source: Neural Computation. Apr2006, Vol. 18 Issue 4, p794-816. 23p. 2 Charts, 3 Graphs.
Subjects: Brain, Oscillations, Olfactory nerve, Feedback oscillators, Feedback control systems, Biological neural networks
Abstract: It has been hypothesized that the brain uses combinatorial as well as temporal coding strategies to represent stimulus properties. The mechanisms and properties of the temporal coding remain undetermined, although it has been postulated that oscillations can mediate formation of this type of code. Here we use a generic model of the vertebrate olfactory bulb to explore the possible role of oscillatory behavior in temporal coding. We show that three mechanisms—synaptic inhibition, slow self-inhibition and input properties—mediate formation of a temporal sequence of simultaneous activations of glomerular modules associated with specific odorants within the oscillatory response. The sequence formed depends on the relative properties of odorant features and thus may mediate discrimination of odorants activating overlapping sets of glomeruli. We suggest that period-doubling transitions may be driven through excitatory feedback from a portion of the olfactory network acting as a coincidence modulator. Furthermore, we hypothesize that the period-doubling transition transforms the temporal code from a roster of odorant components to a signal of odorant identity and facilitates discrimination of individual odorants within mixtures. [ABSTRACT FROM AUTHOR]
Copyright of Neural Computation is the property of MIT Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Changing Roles for Temporal Representation of Odorant During the Oscillatory Response of the Olfactory Bulb.
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  Data: <searchLink fieldCode="AR" term="%22Soyoun+Kim%22">Soyoun Kim</searchLink><br /><searchLink fieldCode="AR" term="%22Singer%2C+Benjamin+H%2E%22">Singer, Benjamin H.</searchLink><br /><searchLink fieldCode="AR" term="%22Zochowski%2C+Michal%22">Zochowski, Michal</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Neural+Computation%22">Neural Computation</searchLink>. Apr2006, Vol. 18 Issue 4, p794-816. 23p. 2 Charts, 3 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Brain%22">Brain</searchLink><br /><searchLink fieldCode="DE" term="%22Oscillations%22">Oscillations</searchLink><br /><searchLink fieldCode="DE" term="%22Olfactory+nerve%22">Olfactory nerve</searchLink><br /><searchLink fieldCode="DE" term="%22Feedback+oscillators%22">Feedback oscillators</searchLink><br /><searchLink fieldCode="DE" term="%22Feedback+control+systems%22">Feedback control systems</searchLink><br /><searchLink fieldCode="DE" term="%22Biological+neural+networks%22">Biological neural networks</searchLink>
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  Label: Abstract
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  Data: It has been hypothesized that the brain uses combinatorial as well as temporal coding strategies to represent stimulus properties. The mechanisms and properties of the temporal coding remain undetermined, although it has been postulated that oscillations can mediate formation of this type of code. Here we use a generic model of the vertebrate olfactory bulb to explore the possible role of oscillatory behavior in temporal coding. We show that three mechanisms—synaptic inhibition, slow self-inhibition and input properties—mediate formation of a temporal sequence of simultaneous activations of glomerular modules associated with specific odorants within the oscillatory response. The sequence formed depends on the relative properties of odorant features and thus may mediate discrimination of odorants activating overlapping sets of glomeruli. We suggest that period-doubling transitions may be driven through excitatory feedback from a portion of the olfactory network acting as a coincidence modulator. Furthermore, we hypothesize that the period-doubling transition transforms the temporal code from a roster of odorant components to a signal of odorant identity and facilitates discrimination of individual odorants within mixtures. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Neural Computation is the property of MIT Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1162/neco.2006.18.4.794
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Oscillations
        Type: general
      – SubjectFull: Olfactory nerve
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      – SubjectFull: Feedback oscillators
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      – SubjectFull: Feedback control systems
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      – SubjectFull: Biological neural networks
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      – TitleFull: Changing Roles for Temporal Representation of Odorant During the Oscillatory Response of the Olfactory Bulb.
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              Text: Apr2006
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