Fig. 12.

(a) Confocal images of frog retina; each illustrated frame was the average over 20 ms. Epochs of 40 ms (prestimulus) and 80 ms (poststimulus) are shown. The green rectangle in the third frame of column (a) indicates the size and location of the stimulus pattern. (b) The spatial IOS image sequence before filtering blood dynamics. (c) The spatial IOS image sequence after filtering blood dynamics. (d) The IOS strength distribution image sequence after filtering blood dynamics. Scale bars (in white) represent $50\mu \mathrm{m}$. Reprinted with permission from Ref. 71.