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. 2011 Feb 22;12(3):141–151. doi: 10.1007/s11154-011-9166-4

Fig. 2.

Fig. 2

Central ghrelin signalling is required for the incentive motivation (“wanting”) for sweet rewards in rats. Operant responding (lever-pressing) for a sucrose reward is a increased by peripheral administration of ghrelin to satiated rats and b decreased by peripheral administration of a GHS-R1A (ghrelin receptor) antagonist to hungry rats. Reproduced with permission from Addiction Biology (122)