et al., 2010) for the optimization of goal-directed behavior (Frank et al., 2005; Hester et al., 2008; Magno et al., 2006). Performance decrements on measures of cognitive control in drug addicted individuals (Franken et al., 2010; Hester & Garavan, 2004; Hester et al., 2009; Hester et al., 2007) are associated with reduced functional engagement (Hester & Garavan, 2004; Hester et al., 2009; Li et al., 2008) and structural integrity across these regions (Yuan et al., 2010; Yuan et al., 2009; Nakama et al., 2011; Barrós-Loscertales et al., 2011).
