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. 2020 Aug 28;14:922. doi: 10.3389/fnins.2020.00922

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Copyright © 2020 Pfurtscheller, Schwerdtfeger, Rassler, Andrade, Schwarz and Klimesch.

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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RRI peak-triggered slow BOLD waves (mean ± SE) from 116 ROIs during rest. Respiratory artifacts of comparably large amplitude are prevalent in ROI 36 (right cingulum, supplied by anterior cerebral artery), ROIs 95, 96 (pons/brain stem, supplied by basilar artery) and ROIs 109–116 (vermis cerebelli, also supplied by basilar artery). The majority of ROIs exhibits artifact-free signals. Surprisingly, even a few ROIs in pons/brain stem (e.g., ROI 91 and 93) are of satisfying signal quality.