Ghrelin, a peptide hormone associated with appetite, is also linked to increased reward
seeking behaviors, including food, sex, and drug seeking behaviors through the stimulation
of the mesolimbic dopaminergic system. Moreover, plasma ghrelin concentrations are
increased by cues that predict rewards, suggesting that cues could facilitate cravings and
ultimately relapse. In this project we examined the effects of an overnight fast, a
manipulation known to increase ghrelin concentrations, on gambling behaviors. We also …