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NIRS Studies Show Reduced Interhemispheric Functional Connectivity in Individuals with Multiple Sclerosis That Exhibit Cortical Hypoxia

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Oxygen Transport to Tissue XLIII

Part of the book series: Advances in Experimental Medicine and Biology ((AEMB,volume 1395))

Abstract

Many with multiple sclerosis (MS) have low cortical microvascular oxygen levels (hypoxia), which have been previously proposed to exacerbate inflammation in MS. We do not know if hypoxia impacts or relates to brain function. We hypothesise that within the MS population, those who have hypoxia may show reduced brain functional connectivity (FC). We recruited 20 MS participants and grouped them into normoxic and hypoxic groups (n = 10 in each group) using frequency-domain near-infrared spectroscopy (fdNIRS). Functional coherence of the haemodynamic signal, quantified with functional near-infrared spectroscopy (fNIRS) was used as a marker of brain function and was carried out during resting-state, finger-tapping, and while completing two neurocognitive tasks. Reduced FC was detected in the hypoxic MS group. fNIRS measures of haemodynamic coherence in MS could be a biomarker of functional impairment and/or disease progression.

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Acknowledgments

We would like to thank all the participants who took part in this research. This research was supported by the Canadian Institutes of Health Research and the National Multiple Sclerosis Society of the USA.

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Authors and Affiliations

  1. Hotchkiss Brain Institute (HBI), University of Calgary, Calgary, Canada

    Ateyeh Soroush, Damilola D. Adingupu, Taelor Evans, Lenora Brown & Jeff F. Dunn

  2. Department of Radiology, University of Calgary, Calgary, Canada

    Ateyeh Soroush, Damilola D. Adingupu, Taelor Evans, Scott Jarvis & Jeff F. Dunn

  3. Department of Clinical Neurosciences, University of Calgary, Calgary, Canada

    Ateyeh Soroush, Damilola D. Adingupu, Taelor Evans, Scott Jarvis, Lenora Brown & Jeff F. Dunn

  4. Experimental Imaging Center (EIC), Cumming school of Medicine, University of Calgary, Calgary, Canada

    Ateyeh Soroush, Damilola D. Adingupu, Taelor Evans & Jeff F. Dunn

Authors
  1. Ateyeh Soroush
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  2. Damilola D. Adingupu
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  3. Taelor Evans
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  4. Scott Jarvis
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  5. Lenora Brown
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  6. Jeff F. Dunn
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Corresponding author

Correspondence to Jeff F. Dunn .

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Editors and Affiliations

  1. Institute of Complementary and Integrative Medicine, University of Bern, Bern, Switzerland

    Felix Scholkmann

  2. Department of Physiology & Biophysics, Case Western Reserve University, Cleveland, OH, USA

    Joseph LaManna

  3. Institute of Complementary and Integrative Medicine, University of Bern, Bern, Switzerland

    Ursula Wolf

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Soroush, A., Adingupu, D.D., Evans, T., Jarvis, S., Brown, L., Dunn, J.F. (2022). NIRS Studies Show Reduced Interhemispheric Functional Connectivity in Individuals with Multiple Sclerosis That Exhibit Cortical Hypoxia. In: Scholkmann, F., LaManna, J., Wolf, U. (eds) Oxygen Transport to Tissue XLIII. Advances in Experimental Medicine and Biology, vol 1395. Springer, Cham. https://doi.org/10.1007/978-3-031-14190-4_25

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