frequency electroencephalographic (EEG) activity (Edenberg et al., 2004, Lydall et al., 2011), increased activation of the insular cortex during reward anticipation (Villafuerte et al., 2012), differences in activation of the medial frontal cortex and ventral tegmental area by alcohol cues (Kareken et al., 2010) and increased activation of the nucleus accumbens in reward anticipation paradigms (Heitzeg et al., 2014).