Figure 7.

Single-condition maps, 605 nm reflection; first 4.5 s of the response. A, Series of single-condition (vertical vs blank) reflection images. B, Series of the “orthogonal” single-condition maps (horizontal vs blank). The grayscale of the maps in A and B was centered on the mean value of each image as in Figure 6 and stretched to ±1.5 SD. The baseline pattern (the average image from -0.8 s until stimulus onset) was subtracted from all images. In all images, the red and green crosses correspond to the location of the black and white functional patches, as obtained from the differential map in Figure 8A.