Figure 7. Analysis of the fundamental (first harmonic) responses of a magnocellular (MC) cell to luminance modulation, and of a koniocellular (KC) blue-on cell to short-wavelength-sensitive (SWS) cone-isolating modulation.

A and C, post-stimulus histograms and raster plots of responses to gratings at contrast of 1.0. The upper panels in B and D show amplitude of mean first harmonic response |z₁(C) | (eqn (2)) as a function of contrast C. Error bars represent 95% confidence limits, as calculated by T²_circ (Victor & Mast, 1991). The lower panels show variability of the first harmonic response, plotted as , at each contrast C. Error bars represent 95% confidence limits, as calculated by an F statistic (see Appendix 1).