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. 2010 Jul 8;6(7):e1000846. doi: 10.1371/journal.pcbi.1000846

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Benayoun 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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A, schematic of connection strengths between excitatory, , and inhibitory, , populations, where an arrow indicates a synaptic input. B, schematic of functionally feedforward connectivity, where one mode of network excitation, , excites another mode , but does not directly affect . C, network dynamics visualized. If there are excitatory and inhibitory neurons active, another excitatory neuron may become active, and network state moves rightwards one spot, at net rate , where is the total synaptic input to an excitatory neuron. The rates for other transitions are shown with solid arrows and discussed in the population dynamics section of the results. Dashed arrows represent transitions into the state from adjacent states.

Inline graphic — A, schematic of connection strengths between excitatory, , and inhibitory, , populations, where an arrow indicates a synaptic input. B, schematic of functionally feedforward connectivity, where one mode of network excitation, , excites another mode , but does not directly affect . C, network dynamics visualized. If there are excitatory and inhibitory neurons active, another excitatory neuron may become active, and network state moves rightwards one spot, at net rate , where is the total synaptic input to an excitatory neuron. The rates for other transitions are shown with solid arrows and discussed in the population dynamics section of the results. Dashed arrows represent transitions into the state from adjacent states.