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Journal of Computational Neuroscience

Erschienen in:

01.02.2014

A single functional model of drivers and modulators in cortex

verfasst von: M. W. Spratling

Erschienen in: Journal of Computational Neuroscience | Ausgabe 1/2014

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Abstract

A distinction is commonly made between synaptic connections capable of evoking a response (“drivers”) and those that can alter ongoing activity but not initiate it (“modulators”). Here it is proposed that, in cortex, both drivers and modulators are an emergent property of the perceptual inference performed by cortical circuits. Hence, it is proposed that there is a single underlying computational explanation for both forms of synaptic connection. This idea is illustrated using a predictive coding model of cortical perceptual inference. In this model all synaptic inputs are treated identically. However, functionally, certain synaptic inputs drive neural responses while others have a modulatory influence. This model is shown to account for driving and modulatory influences in bottom-up, lateral, and top-down pathways, and is used to simulate a wide range of neurophysiological phenomena including surround suppression, contour integration, gain modulation, spatio-temporal prediction, and attention. The proposed computational model thus provides a single functional explanation for drivers and modulators and a unified account of a diverse range of neurophysiological data.

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Titel: A single functional model of drivers and modulators in cortex
verfasst von: M. W. Spratling
Publikationsdatum: 01.02.2014
Verlag: Springer US
Erschienen in: Journal of Computational Neuroscience / Ausgabe 1/2014
Print ISSN: 0929-5313
Elektronische ISSN: 1573-6873
DOI: https://doi.org/10.1007/s10827-013-0471-7

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