Fig. 8.

Ensemble averages for texture-only cells (plotted as in Fig. 4) grouped according to their discharge pattern and the series of surfaces employed (left, series P1a/b; right, series P2). Only cells showing an increase in discharge with SP are included here. A: graded cells showed an increase across all 4 SPs. B and C: partially graded cells showed an increase across 3 (B; surfaces 1, 2, and 3, Fig. 1A) or 2 (C; surfaces 1 and 2) of the surfaces. Data are aligned on the onset of drum rotation and normalized to the duration of the stimulation period (60–120 trials per cell).