Summary
International Symposium on Nonlinear Theory and Its Applications
2015
Session Number:C2L-E
Session:
Number:C2L-E-2
Fractal Dimension Analysis of NIRS Time-Series Data During a Mental Arithmetic Task
Kengo Hayami, Masaharu Adachi,
pp.848-851
Publication Date:2015/12/1
Online ISSN:2188-5079
Summary:
Near-infrared spectroscopy (NIRS) is a method that uses the near-infrared band of the electromagnetic spectrum. Currently, brain-computer interfaces (BCIs) using NIRS are being actively studied. Classifying NIRS time-series data according to mental concentration or relaxation is useful for BCI systems. In this study, we used NIRS to measure changes in oxygenated hemoglobin concentration during a mental arithmetic task. We then estimated the correlation dimension and the Higuchi fractal dimension from the NIRS time-series data. As a result, the correlation dimension and the Higuchi fractal dimension during a mental arithmetic task were found to be higher than those during relaxation in most of the NIRS measurement channels.