Figure 3.

Response of a poorly selective, nonlinear putative inhibitory unit. A, Response to drifting bars of various orientations demonstrates minimal orientation selectivity. B, Orientation tuning curve from rasters in A, with fit to sum of Gaussians (dashed line). C, Response to drifting gratings shows continuous, rather than periodic, response, with minimal orientation tuning. D, Orientation tuning curve for drifting gratings. E, Spatial frequency tuning curve, with fit to difference of Gaussians (dashed line).