Fig. S4.

The time course of saliency representations in V1 and SC (overlapping vs. nonoverlapping RFs). Comparison of VROL and SROL when RFs were overlapping or nonoverlapping between brain areas. As described in Materials and Methods, V1 RFs were clustered in the lower left visual field at 5° to 10° eccentricity from the fovea, whereas SCs RFs were sampled widely across the visual field, with little direct RF overlap as our V1 sample. To examine potential differences between overlapping and nonoverlapping RFs between brain areas, we compared our V1 sample with a subset of SCs neurons with RFs that were within the same eccentricity and lower visual field as V1 (overlapping condition) and a subset of SCs neurons with RFs that were outside this range (nonoverlapping). (A–D) Cumulative distributions of VROLs (solid traces) and SROLs (dotted traces) for overlapping (A and C) and nonoverlapping (B and D) RFs. Median latencies indicated by the vertical lines with arrows. ns, Not significant. *P < 0.05, rank sum test.