Testing for nonlinearity in functional near-infrared spectroscopy of brain activities by surrogate data methods

The Journal of Physiological Sciences : JPS
Truong Q D KhoaMasahiro Nakagawa

Abstract

Methods of contemporary physics are increasingly important for biomedical research. For a multitude of diverse reasons there exists a gap between the practitioners of biomedicine and modern physics methodologies. In this work, the technique of surrogate data has been used as a method to test for the linearity or nonlinearity of biomedical functional near-infrared spectroscopy (fNIRS) signals observing brain activities. Throughout three different surrogate tests, the third-order autocovariance, the asymmetry resulting from time reversal, and the delay vector variance, the dynamic response of brain activities through fNIRS biomedical signals is very likely to be a nonlinear system.

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Citations

Jun 24, 2011·PloS One·Vítor Lopes-dos-SantosAdriano B L Tort
Sep 13, 2018·Journal of Neural Engineering·Zhenhu LiangYunjie Tong

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