FIG. 4.
Direction and magnitude of cochleotopic gradients in fields A1 (blue), R (red), MM (green), and RM (orange). A–C: polar plots of correlation coefficient of the best (center) frequency with a rotated axis (see methods for details) for “on” (A), “sustained” (B), and “off” (C) response. On each plot, 3 lines in the same color show data from PT, 1/3-octave BPN, and 1-octave BPN. D: angles of gradients for each field and stimulus. Within each stimulus column, the left-hand markers show data from monkey L; the right-hand markers show data from monkey S. Dark-filled squares, “on” response; light-filled circles, “sustained” response; open diamonds, “off” response. For detailed r, P, and angle values, see Table 1.