FIG. 2.

Probability of SCR occurrence across all sessions as a function of trial progress during the image viewing task. A: in monkey T (▵), the largest number of SCRs occurred during the 3-s image viewing period. Bin size = 200 ms. In monkey H (•), the greatest probability of SCR production occurred just prior to and immediately after image onset. B: skin conductance responses mark the transition between epochs of closed and open eyes within the rest period. Histograms of SCR occurrence in monkeys H and T (top and bottom, respectively) centered on the closing and opening of the eyes. Bin size = 1 s. n = 213 and 225 transitions for monkeys T and H, respectively (all sessions).