Figure 7. Neuronal spike counts, R_test(θ,f,Δφ,Δx_enc), elicited by a single presentation of a single test image, with stimulus disparity (Δx_stim, Δy_stim) = (−2, +2).

As in Figure 6, only neurons with zero phase disparity are shown, Δφ = 0. The different panels each show 126 neurons tuned to different spatial frequencies f, while 21 preferred horizontal disparity tunings Δx_enc and 6 orientations θ are shown by the horizontal and vertical axes, respectively. In each panel, an arrow marks the neurons tuned to the horizontal disparity of the stimulus. The colorscale is the same in all panels. The average response of the population to all Gaussian-noise stimuli with this disparity was shown in Figure 6B (note different colorscale). This mean response differs from the single-stimulus response shown here because the latter is affected by stimulus-dependent variation, reflecting the properties of this particular image, and Poissonian noise on neuronal spiking. Matlab code: This figure was generated by Protocol S6.