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Estimation of Skin Blood Flow Artefacts in NIRS Signals During a Verbal Fluency Task

  • Akitoshi SeiyamaEmail author
  • Kotona Higaki
  • Nao Takeuchi
  • Masahiro Uehara
  • Naoko Takayama
Conference paper
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 876)

Abstract

The aim of this study was to clarify effects of skin (scalp) blood flow on functional near infrared spectroscopy (fNIRS) during a verbal fluency task. In the present study, to estimate the influence of skin blood flow on fNIRS signals, we conducted examinations on 19 healthy volunteers (39.9 ± 13.1 years, 11 male and 8 female subjects). We simultaneously measured the fNIRS signals, skin blood flow (i.e., flow, velocity, and number of red blood cells [RBC]), and pulse wave rates using a multimodal fNIRS system. We found that the effects of skin blood flow, measured by the degree of interference of the flow, velocity, and number of RBCs, and pulse wave rates, on NIRS signals varied considerably across subjects. Further, by using the above physiological parameters, we evaluated application of the independent component analysis algorithm proposed by Molgedey and Schuster (MS-ICA) to remove skin blood flow artefacts from fNIRS signals.

Keywords

Functional near infrared spectroscopy Verbal fluency task Independent component analysis Pearson’s correlation coefficient Coefficient of spatial uniformity 

Notes

Acknowledgments

This study was supported in part by grants-in-aid from the Ministry of Education, Science and Culture of Japan.

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Copyright information

© Springer Science+Business Media, New York 2016

Authors and Affiliations

  • Akitoshi Seiyama
    • 1
    Email author
  • Kotona Higaki
    • 1
    • 2
  • Nao Takeuchi
    • 1
    • 2
  • Masahiro Uehara
    • 1
  • Naoko Takayama
    • 2
  1. 1.Division of Medical Devices for Diagnoses, Human Health Sciences, Graduate School of MedicineKyoto UniversityKyotoJapan
  2. 2.Laboratory of Clinical Examination, Takayama Medical Clinic, Medical Corporation TaihoukaiTakayamaJapan

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