caa a22 4500 44535299X CHVBK 20180317142850.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00221-011-2564-8 doi (NATIONALLICENCE)springer-10.1007/s00221-011-2564-8 Adaptation to rotated visual feedback depends on the number and spread of target directions [Elektronische Daten] [Otmar Bock, Gerd Schmitz] It has been proposed in the past that adaptation to rotated visual feedback is based on directionally tuned modules. Here, we investigate whether adaptation depends on the number of modules that are concurrently activated. To disambiguate the number of modules and their spatial overlap, we decided to vary the number of target directions and their spacing independently. In light of recent work on the existence of fast and slow adaptive processes, we analyzed the role of target number and spacing separately for the first eight movements under rotated visual feedback and for later movements. We found that during the first eight movements, adaptation progressed three times faster when targets were spaced across a 42° rather than across a 360° range, irrespective of their number. During the subsequent movements, adaptation progressed 1.66 times faster with two than with eight targets, irrespective of their spacing. This differential dependence of early and late adaptation on target metrics confirms the existence of adaptive processes with different time scales and suggests that those processes differ not only by their clocking speed, but also by their functional properties. Specifically, the speed of fast processes seems to be constrained by the directional tuning width of adaptive modules, and the speed of slow processes by the number of presentations per target direction. Springer-Verlag, 2011 Motor learning nationallicence Timescales nationallicence Recalibration nationallicence Direction nationallicence Tuning curves nationallicence Bock Otmar Institute of Physiology and Anatomy, German Sport University, 50927, Cologne, Germany aut Schmitz Gerd Leibniz Universität Hannover Institut für Sportwissenschaft, Am Moritzwinkel 6, 30167, Hannover, Germany aut Experimental Brain Research Springer-Verlag 209/3(2011-03-01), 409-413 0014-4819 209:3<409 2011 209 221 https://doi.org/10.1007/s00221-011-2564-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00221-011-2564-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bock Otmar Institute of Physiology and Anatomy, German Sport University, 50927, Cologne, Germany aut NATIONALLICENCE 700 1- Schmitz Gerd Leibniz Universität Hannover Institut für Sportwissenschaft, Am Moritzwinkel 6, 30167, Hannover, Germany aut NATIONALLICENCE 773 0- Experimental Brain Research Springer-Verlag 209/3(2011-03-01), 409-413 0014-4819 209:3<409 2011 209 221 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer