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. 2016 Jun 7;10:225. doi: 10.3389/fnins.2016.00225

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Copyright © 2016 Ladstein, Evensmoen, Håberg, Kristoffersen and Goa.

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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Mean correlation coefficients between the nuisance regressors and time course of the expected BOLD signal change for each contrast. (A) Correlation with contrast Learning and (B) correlation with contrast Cross fixation. Mean value and 95 % confidence interval is indicated. Nuisance regressors cc1–cs2 are the RETROICOR type cardiac regressors, rc1–rs2 are the RETROICOR type respiratory regressors, hr is the heart rate regressor, rvt is the respiratory volume per time regressor and m1–m6 are the motion regressors.