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. 2022 Oct 10;7(6):e1040. doi: 10.1097/PR9.0000000000001040

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Copyright © 2022 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of The International Association for the Study of Pain.

This is an open access article distributed under the Creative Commons Attribution License 4.0 (CCBY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 5. — Relationships between power changes and chronic pain relief. Spearman rank correlations were run between changes in power spectra and pain intensity after the nerve block procedure. Correlations were assessed for the statistically significant power spectra effects (theta power increase at the F3 and Fz electrodes; delta and alpha power increase at the Fz electrode). Significance thresholds were set at P ≤ 0.05. Significant correlations between pain relief and theta power change at the Fz electrode were depicted by red color; y-axis, and x-axis, changes in power spectra and pain intensity following nerve block, respectively.