Figure 6:

Simulation 1a: Dissociable time courses of learning-induced changes to CS- and US-onset phasic bursting. (a) Population dopamine cell activity during early learning (top) and fully trained (bottom), adapted from Ljungberg et al.'s, (1992), Figure 13 with permission from The American Physiological Society: Journal of Neurophysiology, copyright 1992. Note robust firing after both CS- (left vertical line) and US-onset (right vertical line) early in training (top). (b,c) Activity in key model components during initial early learning (b); and, after full training (c). KEY: solid black - VTAp activity (dopamine cells); dashed red - CEmPos activity (central amygdalar nucleus, medial segment - positive coding); zipper orange - VSPatchPosD1 activity (ventral striatum patch cells).