Figure 8.

Distribution of water-selective versus cocaine-selective neurons during acquisition of self-administration during the water-cocaine multiple schedule. Percentage of phasic cells is plotted as a function of cell type classification across the three components (initial, reliable, stable) of self-administration training during the multiple schedule. Wat, Neurons that exhibited one of three types of patterned discharges relative only to water-reinforced responding; Coc, neurons that exhibited one of four types of patterned discharges relative only to cocaine-reinforced responding; Both, neurons exhibiting similar, overlapping neuronal firing patterns across the two reinforcer (water and cocaine) conditions.