Exemplar LFP signal and its extracted phase.
Rewarded (A) and unrewarded (B) stimuli.
Time course of the difference in average synchrony between rewarded and unrewarded stimuli (vertical axis) in the Utah array of monkey 1 (A) and monkey 2 (B) as a function of time (in days) (horizontal axis). Gray strips (yellow in color) indicate training days; white strips indicate no recordings; vertical thick line (red line in color) indicates the reward reversal moment.
(A, C) Temporal evolution in the difference in average synchrony between rewarded and unrewarded stimuli after stimulus onset (vertical axes in milliseconds) for each day of training (horizontal axes) for the first (A) and second (C) monkey. The two curves in the panels trace the peaks in the absolute difference in average synchrony for two different time intervals (see text). The blue curve is for the early interval; the pink line for the late interval. The black line indicates the reversal moment; the dashed lines the breaks in training (no recording). (B, D) Time courses of the difference in average synchrony corresponding to the two curves of panels (A) and (C), respectively (in corresponding colors). Same convention as in Fig. 3 .
(A, C) Changes in the direction of wave propagation in the Utah array for the first monkey during presentation of the rewarded (A) and the unrewarded (C) stimuli as a function of time after stimulus onset (in milliseconds) (vertical axis) and as a function of training days (horizontal axis). White and black indicate the two propagation directions (forward and back). (B, D) Indicates when the propagation directions are significant (white and black as in panels A and C) and nonsignificant (gray) for the rewarded (B) and unrewarded (D) stimuli. The vertical thick line (red line in color) indicates the reward reversal moment.
(A, B) Wave propagation in the Utah array for the first monkey, during the first day of training, using LFP phases centered at 70 ms after the onset of the rewarded stimulus (A), and during the last day of training (day 37), also centered at 70 ms after the onset of the rewarded stimulus (B). (C, D) Same but for the first day of training, and using LFP phases centered at 160 ms after the onset of the rewarded stimulus (C), and for the last day of training (day 37), also centered at 160 ms (D). Grayscales indicate delays in milliseconds of wave propagation; the scale is shown right to each panel (note the differences in range). Crosses indicate wireless electrodes.
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