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. 2019 Feb 22;13:63. doi: 10.3389/fnhum.2019.00063

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Copyright © 2019 Kim, Yoshimura and Koike.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Experimental design. A target appeared at one of four positions distributed 4 cm from the center in the horizontal and vertical directions. Each trial consists of three phases. When a trial started, nothing appeared on the screen (Standby), and subjects waited for the next phase. Next, a cursor and target appeared on the screen, and subjects prepared for movement execution (Premovement). When the color of the markers changed to black, subjects moved the cursor from the center to the target using the touchpad (Execution). Three windows from the premovement phase were used for analysis (F: window starting at onset of the premovement phase, M: window starting 1 s after onset of the premovement phase, B: window before the execution phase). Four sizes were used for each window (0.5 s, 1.0 s, 1.5 s, and 2.0 s).