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. 2020 Jan 21;238(2):259–272. doi: 10.1007/s00221-020-05727-9

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© The Author(s) 2020

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Fig. 2 — Gray matter increase in the right intraparietal sulcus (a), superior temporal sulcus (b), and SII (c) of macaque after training to use a rake to retrieve food that could not be reached otherwise. From (Quallo et al. 2009)