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. 2016 Oct 31;7:13208. doi: 10.1038/ncomms13208

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Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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We model a small local field of rodent V1 cortex, in which all cells have similar retinotopy. Input images (17 × 17 pixels in size) are first processed through an ON-centre and an OFF-centre surround filter, generating a total of 17 × 17 × 2 inputs (each of which emulates an ON-centre or OFF-centre retinal ganglion cell). Each principal neuron (E) receives one excitatory connection from each retinal input, as well as one excitatory connection from every other principal neuron. In addition, principal neurons send excitatory connections to a population of inhibitory interneurons (I). Inhibitory neurons send inhibitory connections to principal neurons and to each other. Feedforward and E-E connections are plastic; E-I, I-I and I-E connections are fixed. See Methods for a full description of the model.