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Abnormal white matter microstructure along the thalamus fiber pathways in women with primary dysmenorrhea

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Abstract

Primary dysmenorrhea (PDM) is a cyclic menstrual pain in the absence of pelvic anomalies, and women with PDM have an increased sensitivity to pain than the internal and external areas associated with menstrual pain. However, the brain abnormality in the ascending pain pathways in dysmenorrhea remains largely unclear. As the thalamus plays a significant role in transmission of nociceptive input, we examined whether white matter microstructure of the thalamus-related fiber tracts obtained by DTI in women with PDM (n = 47) differs from healthy controls. A novel tractography atlas-based analysis method that detects tract integrity and altered microstructural properties along selected fibers was employed. The fiber bundles of interest contained the thalamus- primary somatosensory cortex (SI), thalamus- dorsal anterior cingulate cortex (dACC)/supplementary motor area (SMA), thalamus-insula, and thalamus-ACC. As compared with controls, abnormal white matter microstructures were found along the thalamus-related white matter fiber tracts. Additionally, the intensity of menstrual pain was significantly associated with diffusion measures of thalamus-SI fiber connections. Our study suggested that the thalamus-related pain processing pathways had altered white matter integrity that persisted beyond the time of menstruation, and the white matter microstructure of the thalamus-SI pathways was closely related to menstrual pain in the intensity by women with PDM.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant Nos. 81901723, 81871331, and 81871330), the National Natural Science Foundation of Shaanxi Province (Grant No. 2018JM7127), the Fundamental Research Funds for Central Universities (Grant No. xjj2018261) and the Institutional Science Foundation of First Affiliated Hospital of Xi’an Jiaotong University (Grant No. 2017QN-24).

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Correspondence to Jixin Liu or Hongjuan Liu.

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Juan He, Wanghuan Dun, Fang Han, Ke Wang, Jing Yang, Shaohui Ma and Ming Zhang critically reviewed the content and approved the final version for publication. They declared no conflict of interest.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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He, J., Dun, W., Han, F. et al. Abnormal white matter microstructure along the thalamus fiber pathways in women with primary dysmenorrhea. Brain Imaging and Behavior 15, 2061–2068 (2021). https://doi.org/10.1007/s11682-020-00400-9

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  • DOI: https://doi.org/10.1007/s11682-020-00400-9

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