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. 2014 Apr 2;34(14):4905–4913. doi: 10.1523/JNEUROSCI.4404-13.2014

Figure 5.

Figure 5.

Intra-VTA orexin-A, but not ghrelin, potentiates phasic NAc dopamine evoked during pellet retrieval. A, Average dopamine concentration evoked during pellet retrieval before (gray) and after (black) intra-VTA aCSF infusion (n = 4). B, Average dopamine concentration evoked during pellet retrieval before (gray) and after (red) intra-VTA ghrelin infusion (n = 5). C, Average dopamine concentration evoked during pellet retrieval before (gray) and after (green) intra-VTA orexin-A infusion (n = 5). D, Peak dopamine evoked during pellet retrieval before and after intra-VTA infusion of aCSF, ghrelin, or orexin-A. E, Intra-VTA ghrelin and orexin-A significantly increased postsession chow intake, relative to vehicle. F, Coronal brain sections modified from Paxinos and Watson (2007). Colored squares indicate approximate locations of cannula tips from all rats used in VTA infusion experiments (black, aCSF; red, ghrelin; green, orexin-A). Numbers at left indicate approximate distance from bregma in millimeters. G, Representative coronal brain slice with VTA cannula stained for TH. Error bars indicate mean ± SEM; *p < 0.05, **p < 0.01.