Figure 4

Spatial characteristics of the two groups of hexadirectional modulation. (A) All types of periodic rotation symmetries of the GoodPerf group are not significant in the space boundary region and the central region (t test, p > 0.05). (B) The BadPerf group shows no obvious directional modulation in the boundary region, but displays significant six-directional modulation in the central region (t test, p = 0.005).