Distribution of spiking neurons after presenting four figures to the model.

<p><b>A</b>: The lines of small white circles denote an entire column of neurons of an NxN matrix. We used N-16 to clearly illustrate the distribution of the spiking of neurons. Arrows point to the spiking pattern. The light-dark squares in the centre column represent the NxN matrices of neurons of the model. The coloring is as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0010705#pone-0010705-g005" target="_blank">figure 5</a>. Dotted line demarcates the stimulus. <b>B</b>: The neurons from (A) are here plotted on the <i>y</i>-axis (small, white circles). Each black and grey dot represents a spike from the corresponding neuron on the <i>y</i>-axis. Spikes from neurons from feature map 1 are in black and spikes from feature map 2 neurons in grey.