Physiological Fluctuations Show Frequency-Specific Networks in fNIRS Signals During Resting State

Raul FERNANDEZ ROJAS, Xu HUANG, Jesus Hernandez Juare, Keng Liang Ou

Research output: A Conference proceeding or a Chapter in BookConference contribution

4 Citations (Scopus)

Abstract

Physiological fluctuations are commonly present in functional studies of hemodynamic response such as functional magnetic resonance imaging (fMRI) and functional near-infrared spectroscopy (fNIRS). However, the effects of these signals in neural mechanisms are not fully understood. Thus, the aim of this study is to propose that frequency-specific networks exist in the somatosensory region within the frequency range of physiological fluctuations. We used a wavelet coherence approach to identify functional connectivity between cortical regions. Based on the spectral response, four frequency bands were identified: cardiac (0.8-1.5 Hz), respiration (0.16-0.6 Hz), low frequency oscillations (LFO) (0.04-0.15 Hz), and very low frequency oscillations (VLFO) (0.0130.04 Hz). Eight cortical networks were revealed after ipsilateral and contralateral analysis to evaluate connectivity in each frequency band. The ANOVA analysis proved the adequacy of the connectivity map for all frequencies bands. Finally, these findings suggest possible frequency-specific organizations within the frequency bands of physiological fluctuations in the resting human brain.

Original languageEnglish
Title of host publication39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages2550-2553
Number of pages4
ISBN (Electronic)9781509028092
DOIs
Publication statusPublished - 11 Jul 2017
Event39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) -
Duration: 1 May 2017 → …

Publication series

NameProceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
ISSN (Print)1557-170X

Conference

Conference39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
Period1/05/17 → …

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FERNANDEZ ROJAS, R., HUANG, X., Juare, J. H., & Ou, K. L. (2017). Physiological Fluctuations Show Frequency-Specific Networks in fNIRS Signals During Resting State. In 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (pp. 2550-2553). [8037377] (Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS). IEEE, Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/EMBC.2017.8037377