Figure 6. ACC neurons tend to fire similarly for reward and shock.

A-B) Distributions of counts for neurons selective for shock- or reward-self and other during the outcome epoch, based on calculated index scores. Index scores were obtained as the normalized difference between reward (B) or shock (A) and neutral firing rates (i.e., shock index = shock − neutral/ shock + neutral; reward index: reward − neutral/ reward + neutral) during self-outcome trials. Counts of cells firing significantly greater than or less than neutral trials are represented by black bars (Wilcoxon; p < 0.05). Data was combined across R/R and R/N trial blocks. Wilcoxon tests report significant shifts in distributions and chi-squared tests report significant differences between greater and lesser counts of neurons. C) Correlation between reward and shock trials during self-trials.