Activity in neuronal array.
White pixels represent spiking cells.
At this time, most of the activity is in regions with preferred orientation of about . External input is modeled independently for each cell as a Poisson process of excitatory voltage pulses of size , arriving at a mean rate which depends on the phase difference between the stimulus orientation and the cell's preferred orientation. A simulation with 2 stimuli of different orientations. All cells in the left half plane received a stimulus with a specific orientation, while cells in the right half plane received a stimulus with an orthogonal orientation. All curves are averaged over populations of neurons.