Figure 6.

Predicted spatial conflict during antisaccade trials

(A–D) Traces show expected cue-driven (brown) and saccade-related responses (purple) obtained by assuming that their magnitudes and latencies will be the same as in the ODR task but that they will overlap in time depending on the interval between cue onset and saccade onset (i.e., the rPT). For the young monkeys (A and B), the expected presaccadic responses are the same as the presaccadic response in Figure 5A (right side, magenta trace aligned to saccade onset), whereas the cue-driven responses are the same as the activity evoked by the cue in Figure 5A (left side, magenta trace aligned to cue onset) but shifted in time. The graphs show the two responses superimposed when the cue onset occurs 140 ms (A, dotted line) or 230 ms (B, dotted line) before the saccade. For the adult monkeys (C and D), the expected responses were constructed in the same way but based on the corresponding ODR activity recorded in the adult sample (Figure 5B, magenta trace).

(E) Expected spatial bias as a function of the time separation between cue onset and saccade onset (i.e., rPT). Values on the y axis correspond to the average difference between superimposed cue-driven and saccade-related responses calculated in a 50 ms presaccadic window (gray shades in A–D). Positive (negative) values indicate a cue-driven response that is stronger (weaker) than the saccade-related activity. The four highlighted data points correspond to the examples in panels A–D.