Fig. 8. Receptive-field locations and preferred-disparity distributions among 973 disparity-sensitive neurons from macaque V1.

(A) Receptive-field location of each neuron. The left and right subplots show neurons for which preferred horizontal disparity and preferred vertical disparity were measured, respectively. The colors represent the study from which each neuron came. Most neurons had receptive fields in the lower visual field. Very few were in the upper right quadrant. (B) Distributions of preferred horizontal disparity grouped by upper and lower visual field. The histograms represent the number of cells observed with each preferred disparity. The curves represent those histograms normalized to constant area. The preferred disparities of neurons from the upper visual field (blue) are biased toward uncrossed disparities, whereas the preferences of neurons from the lower visual field (red) are biased toward crossed disparities. (C) Distributions of preferred vertical disparities grouped by quadrants with the same expected sign of vertical disparity. Again, the histograms represent the actual cell counts, and the curves represent those histograms normalized for constant area. (D) Joint distribution of preferred horizontal and vertical disparities from the sampled neurons. Darker color represents more frequent observations. The marginal distributions for horizontal and vertical disparities are shown on the top and right, respectively.