Impact of Changes in Systemic Physiology on fNIRS/NIRS Signals: Analysis Based on Oblique Subspace Projections Decomposition

Nasseri, Nassim; Caicedo, Alexander; Scholkmann, Felix; Zohdi, Hamoon; Wolf, Ursula (2018). Impact of Changes in Systemic Physiology on fNIRS/NIRS Signals: Analysis Based on Oblique Subspace Projections Decomposition. Advances in experimental medicine and biology, 1072, pp. 119-125. Springer 10.1007/978-3-319-91287-5_19

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Measurements of cerebral and muscle oxygenation (StO2) and perfusion ([tHb]) with functional near-infrared spectroscopy (fNIRS) and near infrared spectroscopy (NIRS), respectively, can be influenced by changes in systemic physiology. The aim of our study was to apply the oblique subspace projections signal decomposition (OSPSD) to find the contribution from systemic physiology, i.e. heart rate (HR), electrocardiography (ECG)-derived respiration (EDR) and partial pressure of carbon dioxide (pCO2) to StO2 and [tHb] signals measured on the prefrontal cortex (PFC) and calf muscle. OSPSD was applied to two datasets (n1 = 42, n2 = 79 measurements) from two fNIRS/NIRS speech studies. We found that (i) all StO2 and [tHb] signals contained components related to changes in systemic physiology, (ii) the contribution from systemic physiology varied strongly between subjects, and (iii) changes in systemic physiology generally influenced fNIRS signals on the left and right PFC to a similar degree.

Item Type:

Journal Article (Original Article)

Division/Institute:

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

Graduate School:

Graduate School for Health Sciences (GHS)

UniBE Contributor:

Nasseri, Nassim; Scholkmann, Felix; Zohdi, Hamoon and Wolf, Ursula

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

0065-2598

Publisher:

Springer

Language:

English

Submitter:

Hamoon Zohdi

Date Deposited:

21 Jan 2019 14:59

Last Modified:

18 Dec 2019 04:34

Publisher DOI:

10.1007/978-3-319-91287-5_19

PubMed ID:

30178333

BORIS DOI:

10.7892/boris.123770

URI:

https://boris.unibe.ch/id/eprint/123770

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