“…For instance, several studies have demonstrated that brief abstinence from nicotine alters patterns of brain activation during the performance of effortful cognitive tasks (Froeliger, Modlin, Kozink, Wang, & McClernon, 2012;Kozink, Kollins, & McClernon, 2010;Kozink, Lutz, Rose, Froeliger, & McClernon, 2010;Sweet et al, 2010;Xu et al, 2005;Xu et al, 2006), and that these effects are moderated by age (Falcone et al, 2013), genotype (Loughead et al, 2009), and individual differences in performance (Nichols, Gates, Molenaar, & Wilson, 2013). More recently, fMRI has been used to characterize the mechanisms through which nicotine replacement therapy (Beaver et al, 2011;Cole et al, 2010) and other medications for the treatment of tobacco dependence (e.g., varenicline; Loughead et al, 2010) remediate withdrawal-related cognitive deficits.…”