University of Oulu

Huotari N, Tuunanen J, Raitamaa L, Raatikainen V, Kananen J, Helakari H, Tuovinen T, Järvelä M, Kiviniemi V and Korhonen V (2022) Cardiovascular Pulsatility Increases in Visual Cortex Before Blood Oxygen Level Dependent Response During Stimulus. Front. Neurosci. 16:836378. doi: 10.3389/fnins.2022.836378

Cardiovascular pulsatility increases in visual cortex before blood oxygen level dependent response during stimulus

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Author: Huotari, Niko1,2; Tuunanen, Johanna1,2; Raitamaa, Lauri1,2;
Organizations: 1Oulu Functional Neuro Imaging Group, Research Unit of Medical Imaging Physics and Technology (MIPT), University of Oulu, Oulu, Finland
2Department of Diagnostic Radiology, Medical Research Center (MRC), Oulu University Hospital, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 5 MB)
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Language: English
Published: Frontiers Media, 2022
Publish Date: 2022-05-20


The physiological pulsations that drive tissue fluid homeostasis are not well characterized during brain activation. Therefore, we used fast magnetic resonance encephalography (MREG) fMRI to measure full band (0–5 Hz) blood oxygen level-dependent (BOLDFB) signals during a dynamic visual task in 23 subjects. This revealed brain activity in the very low frequency (BOLDVLF) as well as in cardiac and respiratory bands. The cardiovascular hemodynamic envelope (CHe) signal correlated significantly with the visual BOLDVLF response, considered as an independent signal source in the V1-V2 visual cortices. The CHe preceded the canonical BOLDVLF response by an average of 1.3 (± 2.2) s. Physiologically, the observed CHe signal could mark increased regional cardiovascular pulsatility following vasodilation.

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Series: Frontiers in neuroscience
ISSN: 1662-4548
ISSN-E: 1662-453X
ISSN-L: 1662-4548
Volume: 16
Article number: 836378
DOI: 10.3389/fnins.2022.836378
Type of Publication: A1 Journal article – refereed
Field of Science: 3126 Surgery, anesthesiology, intensive care, radiology
3112 Neurosciences
Funding: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This study was supported by Academy of Finland/Aivosäätiö TERVA 1-2, Grant/Award Numbers: 275342, 314497, 335720; Instrumentariumin Tiedesäätiö; Jane ja Aatos Erkon Säätiö. Maire Taposen Säätiö; Medical Research Center Oulu; Pohjois-Suomen Terveydenhuollon Tukisäätiö; Suomen Aivosäätiö; Suomen Lääketieteen Säätiö; The University of Oulu Scholarship Foundation; VTR grants from Oulu University Hospital.
Academy of Finland Grant Number: 314497
Detailed Information: 314497 (Academy of Finland Funding decision)
335720 (Academy of Finland Funding decision)
Copyright information: © 2022 Huotari, Tuunanen, Raitamaa, Raatikainen, Kananen, Helakari, Tuovinen, Järvelä, Kiviniemi and Korhonen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.