Trainability of hemodynamic parameters: A near-infrared spectroscopy based neurofeedback study

Silvia Erika Kober, Vanessa Hinterleitner, Günther Bauernfeind, Christa Neuper, Guilherme Wood

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We investigated the trainability of the hemodynamic response as assessed with near-infrared spectroscopy (NIRS) during one neurofeedback (NF) session. Forty-eight participants were randomly assigned to four different groups that tried to either increase or decrease oxygenated (oxy-Hb) or deoxygenated hemoglobin (deoxy-Hb) over the inferior frontal gyrus during imagery of swallowing movements. Deoxy-Hb could be successfully up-regulated while oxy-Hb could be successfully down-regulated during NF. Participants were not able to down-regulate deoxy-Hb or to up-regulate oxy-Hb. These results show that the natural course of oxy- and deoxy-Hb during movement imagery can be reinforced by providing real-time feedback of the corresponding NIRS parameter since deoxy-Hb generally increases and oxy-Hb decreases during imagery of swallowing. Furthermore, signal-to-noise ratio of deoxy-Hb but not of oxy-Hb improved during training. Our results provide new insights into the trainability of the hemodynamic response as assessed with NIRS and have an impact on the application of NIRS-based real-time feedback.

Original languageEnglish
Pages (from-to)168-180
Number of pages13
JournalBiological Psychology
Volume136
DOIs
Publication statusPublished - 1 Jul 2018

Keywords

  • Dysphagia
  • Motor imagery
  • Neurofeedback
  • NIRS
  • Swallowing

ASJC Scopus subject areas

  • Neuroscience(all)
  • Neuropsychology and Physiological Psychology

Cooperations

  • BioTechMed-Graz

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