Dopamine on D2-like receptors “reboosts” dopamine D1-like receptor-mediated behavioural activation in rats licking for sucrose

These results are consistent with the hypothesis that the level of activation of the responses to the reward-associated cues depends on dopamine D1-like receptor stimulation, and is updated, or “reboosted”, on the basis of a dopamine D2-like receptor-mediated evaluation process occurring during the consummatory transaction with the reward.