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. 2016 Nov;23(11):595–606. doi: 10.1101/lm.043026.116

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© 2016 Singer et al.; Published by Cold Spring Harbor Laboratory Press

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Figure 8. — Peak [DA] responses vary as a function of lever visibility. The differential ability of the CS versus the US to elicit a DA response (peak CS minus US-evoked DA release; [DA]_CS–US) is quantified for STs (A), INs (B), and GTs (C). When the lever was visible, [DA]_CS–US for STs was significantly greater than [DA]_CS–US for either GTs ((*) P < 0.05) or INs ((^#) P < 0.05; food cup contact trials). In contrast, when the lever was covered (black bars), [DA]_CS–US did not differ between rats. Means are shown as ±SEM.