“…Further, balance impairment is strongly associated with cognitive impairment in older adults with (Allcock et al, 2009;Mak, Wong, & Pang, 2014;McKay, Lang, Ting, & Hackney, 2018) and without (Camicioli & Majumdar, 2010;Gleason, Gangnon, Fischer, & Mahoney, 2009;Herman et al, 2010;Mirelman et al, 2012) Parkinson's disease, and rehabilitation interventions that simultaneously target cognitive engagement show greater improvement in motor function in healthy aging (Kraft, 2012;Wu, Chan, & Yan, 2016) and in Parkinson's disease (McKay, Ting, & Hackney, 2016;Petzinger et al, 2013) than interventions that target motor function alone. Collaboration across fields could provide new insight into these synergistic benefits of combined interventions and may help explain counterintuitive findings that balance training can ameliorate anxiety disorders (Bart et al, 2009) or that cognitive training can improve balance and gait (Smith-Ray et al, 2015), leading to the development of more integrated treatment strategies for comorbid motor, cognitive, and psychiatric disorders.…”