caa a22 4500 445352892 CHVBK 20180317142850.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00221-010-2525-7 doi (NATIONALLICENCE)springer-10.1007/s00221-010-2525-7 Vector inversion diminishes the online control of antisaccades [Elektronische Daten] [Matthew Heath, Jeffrey Weiler, Kendall Marriott, Timothy Welsh] Antisaccades require the suppression of a stimulus-driven response (i.e., response suppression) and the computation of a movement plan mirror-symmetrical to the location of a target (i.e., vector inversion). The goal of the present study was to determine whether response suppression, vector inversion or both contribute to previously reported differences in the online control of pro- and antisaccades (Heath in Exp Brain Res 203:743-752, 2010a). Pro- and antisaccades were completed in separate blocks (i.e., blocked schedule) and a block wherein the spatial relation between stimulus and response was provided at response cuing (i.e., random schedule). Notably, the random schedule provides a relative means for equating response suppression across pro- and antisaccades. To examine online trajectory amendments, we computed the proportion of variance (R 2 values) explained by the spatial location of the eye at early, middle and late stages of saccade trajectories relative to the saccade's ultimate endpoint. The basis for this analysis is that between-task differences in R 2 magnitudes reflect differences in the use of feedback for online trajectory amendments: small R 2 values represent a trajectory supported via online control whereas larger R 2 values reflect a reduction in online control. Results show that antisaccades yielded larger R 2 values than prosaccades from early to late stages of saccade trajectories, and this finding was observed regardless of whether or not tasks were equated for response suppression. Thus, we propose that the intentional nature of vector inversion disrupts the normally online control of saccades and renders a mode of control that is not optimized to support error-reducing trajectory amendments. Springer-Verlag, 2011 Antisaccade nationallicence Online nationallicence Prosaccade nationallicence Response suppression nationallicence Vector inversion nationallicence Heath Matthew School of Kinesiology, The University of Western Ontario, N6A 3K7, London, ON, Canada aut Weiler Jeffrey School of Kinesiology, The University of Western Ontario, N6A 3K7, London, ON, Canada aut Marriott Kendall School of Kinesiology, The University of Western Ontario, N6A 3K7, London, ON, Canada aut Welsh Timothy Faculty of Physical Education and Health, University of Toronto, Toronto, ON, Canada aut Experimental Brain Research Springer-Verlag 209/1(2011-03-01), 117-127 0014-4819 209:1<117 2011 209 221 https://doi.org/10.1007/s00221-010-2525-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-010-2525-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Heath Matthew School of Kinesiology, The University of Western Ontario, N6A 3K7, London, ON, Canada aut NATIONALLICENCE 700 1- Weiler Jeffrey School of Kinesiology, The University of Western Ontario, N6A 3K7, London, ON, Canada aut NATIONALLICENCE 700 1- Marriott Kendall School of Kinesiology, The University of Western Ontario, N6A 3K7, London, ON, Canada aut NATIONALLICENCE 700 1- Welsh Timothy Faculty of Physical Education and Health, University of Toronto, Toronto, ON, Canada aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 209/1(2011-03-01), 117-127 0014-4819 209:1<117 2011 209 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer