Figure 6.

Receptive fields containing multiple peaks. A, B, Two RFs that appeared to contain multiple peaks. RFs were fitted with multiple Gaussians, and the contour of each individual Gaussian at 2× SD was superimposed (black). Inset, Polar plot of the cell's responses to drifting gratings. C, D, Thresholded RFs (see Materials and Methods for details) and the integrated intensity along each row (blue circle). Each individual Gaussian (green dotted line) and the summated fitting curve (black) were plotted. Scale bars, 10°.