Cognitive training may provide a new intervention for reducing cognitive complaints and delaying the onset of mild cognitive impairment (MCI) or PD-D. This intervention has been widely studied in other diseases (Cicerone et al., 2011; Olazaran et al., 2010). Moreover, studies have provided evidence not only for behavioral influences, but also for brain connectivity and activity effects of cognitive training (Chapman et al., 2015; Castellanos et al., 2010; Subramaniam et al., 2012; Subramaniam et al., 2014; Belleville et al., 2011; Rosen, Sugiura, Kramer, Whitfield-Gabrieli, & Gabrieli, 2011). This suggests a restorative effect of cognitive training on disrupted brain networks.