Volume 11 Supplement 1

Nineteenth Annual Computational Neuroscience Meeting: CNS*2010

Open Access

Sparse coding models demonstrate some non-classical receptive field effects

BMC Neuroscience201011(Suppl 1):O21

DOI: 10.1186/1471-2202-11-S1-O21

Published: 20 July 2010

Non-classical receptive field (nCRF) effects include several response properties in V1 neurons not explained by a linear-nonlinear (LN) receptive field model, but instead requiring significant interactions between V1 neurons. Using a sparse coding model [1, 2] and bar and grating stimuli, simulated physiology experiments were carried out that replicated several nCRF phenomena reported previously in neurophysiology experiments. These include: end-stopping [3] (Fig. 1), contrast invariance of orientation tuning [4] (Fig. 2), radius, orientation, and contrast tunings of surround suppression [5, 6] (Fig. 3, 4, 5). The results suggest that a sparse coding model can explain many of the nonlinear effects in V1 cells, and is therefore a reasonable candidate for a functional model of striate cortex.
https://static-content.springer.com/image/art%3A10.1186%2F1471-2202-11-S1-O21/MediaObjects/12868_2010_Article_1706_Fig1_HTML.jpg
Figure 1

End-stopping. Comparison with a LN model.

https://static-content.springer.com/image/art%3A10.1186%2F1471-2202-11-S1-O21/MediaObjects/12868_2010_Article_1706_Fig2_HTML.jpg
Figure 2

Contrast invariance of orientation tuning.

https://static-content.springer.com/image/art%3A10.1186%2F1471-2202-11-S1-O21/MediaObjects/12868_2010_Article_1706_Fig3_HTML.jpg
Figure 3

Surround suppression at different contrasts.

https://static-content.springer.com/image/art%3A10.1186%2F1471-2202-11-S1-O21/MediaObjects/12868_2010_Article_1706_Fig4_HTML.jpg
Figure 4

Orientation tuning of surround suppression.

https://static-content.springer.com/image/art%3A10.1186%2F1471-2202-11-S1-O21/MediaObjects/12868_2010_Article_1706_Fig5_HTML.jpg
Figure 5

Surround orientation influences contrast tuning.

Authors’ Affiliations

(1)
Department of Biomedical Engineering, Georgia Institute of Technology
(2)
Department of Electrical and Computer Engineering, Georgia Institute of Technology

References

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Copyright

© Zhu and Rozell; licensee BioMed Central Ltd. 2010

This article is published under license to BioMed Central Ltd.

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