Fig. 5
From: Previous cocaine self-administration disrupts reward expectancy encoding in ventral striatum
Firing on error trials. a Normalized average firing rates across neurons for correct and incorrect trials in the sucrose control group (n = 195; 6 rats). Firing is aligned to fluid-well entry in order to encompass activity immediately upon entry in the fluid well at the start of each delay before reward delivery. Reward delivery on correct trials is marked by the gray dashed line for short-delay, large-reward and small-reward trials. Figure includes forced-choice trials only. b Normalized average firing rates across neurons for correct and incorrect trials in the cocaine self-administration group (n = 103; 4 rats). c–f Distribution of error indices for short-delay (c), long-delay (d), large-reward (e), and small-reward (f) trials for the sucrose control group. Error index = correct−error/correct + error during the last 250 ms of the 500 ms delay that followed fluid-well entry. Distributions included forced-choice trials only. Black bars represent neurons that showed significant difference between correct and error trials (Wilcoxon, p < 0.05). g–j Same c–f except for rats that had self-administered cocaine
