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. 2018 Jan 26;8:1710. doi: 10.1038/s41598-018-20051-7

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Task design and recordings. (a) Illustration of a monkey in the experimental setup. The cues were presented via LEDs above the handle. (b) Delayed grasping task with two grip types (top: precision grip, bottom: power grip), five orientations of the grasping handle, and grasped with either the left or right hand. Grips and orientation were cued using LEDs and handle illumination, while hand was cued by two auditory tones. Trials were presented in pseudorandom order in darkness. c-d, Recording locations for monkey P (c) and S (d) overlaid on a structural MRI. The illuminated oval marks the outline of the recording chamber. Recordings were made in F5 on the bank of the arcuate sulcus (AS) and in AIP toward the lateral end of the intraparietal sulcus (IPS). The cross shows medial (M), lateral (L), anterior (A), and posterior (P) directions. Note that monkey S was implanted in the left hemisphere and monkey P in the right hemisphere.