caa a22 4500 445354291 CHVBK 20180317142854.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s00221-010-2487-9 doi (NATIONALLICENCE)springer-10.1007/s00221-010-2487-9 Suboptimal online control of aiming movements in virtual contexts [Elektronische Daten] [Louis-Nicolas Veilleux, Luc Proteau] We determined whether uncertainty about the location of one's hand in virtual environments limits the efficacy of online control processes. In the Non-aligned and Aligned conditions, the participant's hand was represented by a cursor on a vertical or horizontal display, respectively. In the Natural condition, participants saw their hand. During an acquisition phase, visual feedback was either permitted or not during movement execution. To test the hypothesis (Norris et al. 2001) that reliance on visual feedback increases as the task becomes less natural (Natural<Aligned<Non-aligned), following acquisition, participants performed a transfer phase without visual feedback. During acquisition in both visual feedback conditions, movement endpoint variability increased as the task became less natural. This suggests that the orientation of the display and the representation of one's hand by a cursor introduced uncertainty about its location, which limits the efficacy of online control processes. In contradiction with the hypothesis of Norris et al. (2001), withdrawing visual feedback in transfer had a larger deleterious effect on movement accuracy as the task became less natural. This suggests that the CNS increases the weight attributed to the input that can be processed without first having to be transformed. Springer-Verlag, 2010 Online control nationallicence Movement control nationallicence Reaching nationallicence Proprioception nationallicence Internal model nationallicence Veilleux Louis-Nicolas Département de kinésiologie, Université de Montréal, C.P. 6128, Succursale Centre Ville, H3C 3J7, Montréal, QC, Canada aut Proteau Luc Département de kinésiologie, Université de Montréal, C.P. 6128, Succursale Centre Ville, H3C 3J7, Montréal, QC, Canada aut Experimental Brain Research Springer-Verlag 208/3(2011-02-01), 345-358 0014-4819 208:3<345 2011 208 221 https://doi.org/10.1007/s00221-010-2487-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-010-2487-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Veilleux Louis-Nicolas Département de kinésiologie, Université de Montréal, C.P. 6128, Succursale Centre Ville, H3C 3J7, Montréal, QC, Canada aut NATIONALLICENCE 700 1- Proteau Luc Département de kinésiologie, Université de Montréal, C.P. 6128, Succursale Centre Ville, H3C 3J7, Montréal, QC, Canada aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 208/3(2011-02-01), 345-358 0014-4819 208:3<345 2011 208 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer