Figure 1.

Behavior was similar for common segment lever presses in different sequence blocks. a) Values of the behavioral variables for matched pairs of common-segments lever presses. Common-segments involved presses on the same two levers occurring as part of two different sequence blocks (black vs. gray). Each column represents a different physical lever while the 4 rows display the animal’s x-coordinate, y-coordinate, lever approach angle and lever approach velocity in the 6 bins surrounding each lever press (the lever press occurred at time 0 in each panel). The two lines in each panel correspond to the value of each of these variables in one of the two sequence blocks. During these intervals, the animals’ location and movement were highly similar across sequence blocks but were quite different across the three physical levers. Error bars indicate s.e.m. b) Distributions of the percentage of firing rate variance accounted for when the behavioral variables shown in (a) were used as factors in a multiple linear regression analysis, performed on all ACC neurons (left panel) or all DS neurons (right panel). The residual matrices represent the iFR values that remained after the impact of these behavioral variables has been removed. These matrices will be used in the analyses shown in subsequent figures.