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. 2015 May 8;9:257. doi: 10.3389/fnhum.2015.00257

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Copyright © 2015 Vosskuhl, Huster and Herrmann.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and 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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Typical output of the phase-amplitude coupling (PAC) analysis via envelope-to-signal correlation (Onslow et al., 2011) from two subjects (A,B). The rectangles are drawn to surround a local maximum in the theta and gamma band. Thereby PAC maxima in other frequency bands that smear into the theta and gamma bands can be avoided. PAC values are normalized to each subject’s maximal PAC strength and are displayed color coded with warm colors indicating stronger PAC. The cross marks the maximum within the frequency area of interest.