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. 2014 Jul 24;9(7):e98424. doi: 10.1371/journal.pone.0098424

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© 2014 Azzopardi et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Spatial frequency tuning curves as a function of contrast obtained by two CORF model cells; (a) with no inhibition (, ) and (b) with push-pull inhibition (, ). The dependence of spatial frequency tuning and contrast changes is achieved only when the model LGN cells are processed by a sigmoid function.

Inline graphic — Spatial frequency tuning curves as a function of contrast obtained by two CORF model cells; (a) with no inhibition (, ) and (b) with push-pull inhibition (, ). The dependence of spatial frequency tuning and contrast changes is achieved only when the model LGN cells are processed by a sigmoid function.