“…Second, when a perturbation in action goal occurred, participants were more likely to modify their grasp postures during C. M. L. Hughes & C. Seegelke unimanual object manipulations, compared to when two objects were manipulated (i.e., bimanual object manipulation). The decrease in end-state comfort compliance in nonperturbed trials, as well as the reduced ability to modify grasp posture plans to comply with end-state comfort in perturbed trials during bimanual (relative to unimanual) object manipulation, are consistent with previous behavioral (Hughes & Franz, 2007, 2008Kunde & Weigelt, 2005) and neuroimaging studies (Debaere et al, 2001;Sadato, Yonekura, Waki, Yamada, & Ishii, 1997;Toyokura, Muro, Komiya, & Obara, 2002) demonstrating that planning and executing simultaneous bimanual movements require greater cognitive resources than unimanual actions.…”