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. 2022 Sep 30;270(1):13–31. doi: 10.1007/s00415-022-11398-z

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© The Author(s) 2022

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. 2 — Gray matter regions that present statistically significant changes between patients with persistent headache after COVID-19 resolution (COV) and healthy controls (HC). After false discovery rate correction, COV patients showed lower gray matter volume (GMV) and cortical thickness (CT) than HC. L left, R right. These results were also statistically significant after correcting for age and sex. Additional results after this correction are not shown