Bundled-Optode Method in Functional Near-Infrared Spectroscopy

Hoang-Dung Nguyen, Keum-Shik Hong and Yong-Il Shin

PLOS ONE, 2016, vol. 11, issue 10, 1-23

Abstract: In this paper, a theory for detection of the absolute concentrations of oxy-hemoglobin (HbO) and deoxy-hemoglobin (HbR) from hemodynamic responses using a bundled-optode configuration in functional near-infrared spectroscopy (fNIRS) is proposed. The proposed method is then applied to the identification of two fingers (i.e., little and thumb) during their flexion and extension. This experiment involves a continuous-wave-type dual-wavelength (760 and 830 nm) fNIRS and five healthy male subjects. The active brain locations of two finger movements are identified based on the analysis of the t- and p-values of the averaged HbOs, which are quite distinctive. Our experimental results, furthermore, revealed that the hemodynamic responses of two-finger movements are different: The mean, peak, and time-to-peak of little finger movements are higher than those of thumb movements. It is noteworthy that the developed method can be extended to 3-dimensional fNIRS imaging.

Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0165146

DOI: 10.1371/journal.pone.0165146

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