Volume 12 Supplement 1

Twentieth Annual Computational Neuroscience Meeting: CNS*2011

Open Access

General conditions for spiking neurons and plasticity rules to perform independent component analysis

BMC Neuroscience201112(Suppl 1):P124

DOI: 10.1186/1471-2202-12-S1-P124

Published: 18 July 2011

Given the many different proposed spiking neuron and plasticity models, it is hard to assess what functional roles their behavior may entail. One possible purpose may be to implement independent component analysis (ICA), which directly relates to sparse coding and finding relevant projections in the input space. Based on the theory of ICA [1], we show how different possible implementations of spiking neurons and spike timing dependent plasticity (STDP) can give similar results. We demonstrate how, given a neuron’s characteristics such as activation rule, STDP model and homeostatic mechanisms, one can assess whether a feedforward two-layer network is able to perform ICA. In particular, we study the behavior of exponential integrate-and-fire neurons with voltage-dependent STDP, a non-linear Hebbian rule [2] that can be related to the BCM theory. Both firing rate and spike-time correlation codes can be used as input, illustrating the flexibility of the plasticity rule in terms of neural coding. When applied to natural image patches, we investigate the capacity of generating Gabor-like receptive fields, as found in the primary visual cortex [3], suggesting a biological implementation of ICA in the brain.

Declarations

Acknowledgements

The work presented is supported by the European Union – project # FP7-237955 (FACETS-ITN).

Authors’ Affiliations

(1)
School of Computer and Communications Sciences and Brain-Mind Institute, Ecole Polytechnique Federale de Lausanne (EPFL)

References

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Copyright

© Brito and Gerstner; licensee BioMed Central Ltd. 2011

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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