Cross-Frequency Coupling Between Brain and Body Biosignals: A Systemic Physiology Augmented Functional Near-Infrared Spectroscopy Hyperscanning Study.

Guglielmini, S; Bopp, G; Marcar, V L; Scholkmann, Felix; Wolf, M (2022). Cross-Frequency Coupling Between Brain and Body Biosignals: A Systemic Physiology Augmented Functional Near-Infrared Spectroscopy Hyperscanning Study. In: Oxygen Transport to Tissue XLIII. Advances in Experimental Medicine and Biology: Vol. 1395 (pp. 171-176). New York: Springer 10.1007/978-3-031-14190-4_29

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BACKGROUND

Understanding the brain and body processes during interaction or cooperation between two or more subjects is an important topic in current neuroscientific research. In a previous study, we introduced a novel approach that enables investigation of the coupling of biosignals (brain and systemic physiology, SP) from two subjects: systemic physiology augmented functional near-infrared spectroscopy (SPA-fNIRS) hyperscanning.

AIM

The aim was to extend our signal analysis approach by the cross-frequency time-dependent wavelet transform coherence (WTC) of the fNIRS and SP biosignals to gain new insights into the nature and cause of functional hyperconnectivity.

SUBJECTS AND METHODS

24 pairs of adults took part in a closed-eye versus prolonged eye-contact task of 10 min each. Brain and body activity was measured continuously by SPA-fNIRS hyperscanning. We calculated the time-dependent WTC of the biosignals for four different frequency bands: very low-frequency band (VLF, 0.002-0.08 Hz), low-frequency band 1 (LF1, 0.015-0.15 Hz), low-frequency band 2 (LF2, 0.08-0.15 Hz) and heart rate band (HR, 1-2 Hz). We then performed the cross-frequency correlated-coherence coupling analysis.

RESULTS

A stronger cross-frequency coupling during the eye-contact condition (between 99 pairs of biosignals) was found than during the eye-closed condition (between 50 pairs of biosignals). Prolonged eye contact led to entrainment of the brain and body between different frequency bands and two subjects. The strongest hyperconnectivity was between the LF1-VLF frequency band.

DISCUSSION AND CONCLUSION

With this exploratory study, we reveal further benefits of the SPA-fNIRS approach for future hyperscanning studies.

Item Type:

Book Section (Book Chapter)

Division/Institute:

04 Faculty of Medicine > Medical Education > Institute of Complementary and Integrative Medicine (IKIM)

UniBE Contributor:

Scholkmann, Felix Vishnu

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0065-2598

Series:

Advances in Experimental Medicine and Biology

Publisher:

Springer

Language:

English

Submitter:

Pubmed Import

Date Deposited:

20 Dec 2022 12:29

Last Modified:

02 Mar 2023 23:37

Publisher DOI:

10.1007/978-3-031-14190-4_29

PubMed ID:

36527633

Uncontrolled Keywords:

Cross-frequency time-dependent wavelet transform coherence Eye contact SPA-fNIRS hyperscanning Social interactions

BORIS DOI:

10.48350/176030

URI:

https://boris.unibe.ch/id/eprint/176030

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