Figure 6.

Relationship between symmetry phase and envelope offset. A, The offset was correlated with the symmetry in the V1 population. The symmetry phase was reflected at ±π/2, so that odd-symmetry increased monotonically towards the ends of the abscissa. The offset of the envelope was normalized by the width. The shape of the symbols indicates monkey identity. The filled symbols represent cells with significant envelope offsets (Bootstrap resampling, p<0.05). Labeled arrows indicate the example cells shown in Figure 3. B, The offset was strongly correlated with the symmetry in the V2 population. All the cells with significant offsets lay in the correct quadrant predicted by the 2SU model. Labeled arrows indicate the example cells shown in Figure 5.