Figure 10.

Peripheral stimulation evokes patches of increased fluorescence and parasagittal bands of decreased fluorescence. A, Surface stimulation evokes an on-beam response and three off-beam bands (b1–b3). B, Ipsilateral vibrissal pad stimulation evokes two patches (p1, p2) of increased fluorescence and two parasagittal bands (b2, b3) of decreased fluorescence. C, The contours of the peripheral responses in B (patches in red and bands in blue) were superimposed on a grayscale image of the response to surface stimulation in A. The bands evoked by peripheral stimulation overlap the bands generated by surface stimulation. D, Time courses of the increases in fluorescence (thick lines) from p1 and p2 and the decreases in fluorescence (thin lines) from b2 and b3 of B.