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. 2020 Apr 1;238(5):1177–1189. doi: 10.1007/s00221-020-05782-2

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© The Author(s) 2020

Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — Group results for time-averaged (global) wavelet power and ITPC spectra of the obtained COP signals. Blue lines indicate mean across subjects with shaded areas representing standard error. Orange transparent lines show mean upper 95% confidence boundary of the bootstrapped background. Black vertical bars indicate frequency of visual stimulation. a Global wavelet power for visual stimulation at 0.2 Hz. b Global wavelet power of stimulation at 1.5 Hz. c Global ITPC for stimulation at 0.2 Hz. d Global ITPC for stimulation at 1.5 Hz. All spectra show a significant response at the respective stimulus frequency. For stimulation at 1.5 Hz, ITPC reveals an additional significant phase coupling at around triple the frequency, the black dotted line indicates the frequency value of 4.5 Hz