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. 2019 Sep 20;13:982. doi: 10.3389/fnins.2019.00982

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Copyright © 2019 di Fronso, Fiedler, Tamburro, Haueisen, Bertollo and Comani.

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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iAPF results for both electrode types: (A) individual results in Phase II (pre-cycling condition) and Phase V (passive recovery condition) for all volunteers with alpha activity exceeding the threshold criterion; (B) grand average mean and STD calculated over all volunteers in Phases II (pre-cycling condition), IV (active recovery), and V (passive recovery). Asterisks in panel (B) indicate significant differences between the iAPF values in the different paradigm phases (^∗p < 0.05; ^∗∗p < 0.001).