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. 2015 Mar 5;9:109. doi: 10.3389/fnhum.2015.00109

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Copyright © 2015 Yin, Lou, Fan, Wang and Hu.

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) or licensor 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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Brain regions (left hemisphere) recruited in the recall phase (p < 0.001, uncorrected, k >100) were displayed on a standard inflated brain. The direct comparisons between 2-digit and letter conditions of C.L. as well as the controls were displayed on the right panel (axial plane). The FP, DLPFC, premotor cortex, and SPL were more engaged in the 2-digit condition than in the letter condition of C.L. The interactions were displayed at the bottom panel. Abbreviations: FP, frontal pole; DLPFC, dorsolateral prefrontal cortex; SPL, superior parietal lobule; IPS, intraparietal sulcus; M/IFG, middle/inferior frontal gyri.