Figure 2.

Increasing the duration for running plus visual exposure did not further increase response enhancement. Animals were placed on the spherical floating treadmill daily for 2 h (n = 4) or for 4 h (n = 4) while viewing a vertically oriented bar drifting horizontally. Responses in V1 were measured using intrinsic signal imaging and were normalized to baseline value (day 0). Error bars represent the mean ± SD. Data for 1 h were from Figure 1C (n = 6). Changes after 5 d and 10 d of running plus visual exposure were not significantly different among three groups (two-way ANOVA).