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. 2018 Jul 17;34(4):679–690. doi: 10.1007/s12264-018-0257-z

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 1 — The GUI and the paradigm of the experiment. A square area was set and four brightly-colored ball buttons were arranged at the edge of the square in four locations. A trial was started with “+” and a ball in the middle of the GUI moved to guide the patient to the new target location that was chosen randomly from the four directions. When the ball overlapped with the target button, the four buttons flashed randomly. The stimulation contained 10 repetitions of the flash.